PUMP

Linde HRR130 hydraulic pump D8N bulldozer

The HRR130 Linde hydraulic main pump installed in the Caterpillar D8N bulldozer is a high-pressure axial piston pump designed for industrial earthmoving applications. Its displacement is 130 cc per revolution, and it can generate pressures up to 350 bar. The pump’s housing is made from hardened steel, while pistons, swash plate, and valve components are precision-machined to minimize internal leakage below 2%. Recommended operating temperature is between -20°C and 95°C, and ISO VG46 hydraulic oil ensures optimal lubrication and performance. The pump features a black protective coating to prevent corrosion in harsh working conditions.

Common causes of HRR130 pump failure include contaminated hydraulic fluid, cavitation due to low suction pressure, piston and cylinder block wear, and valve sticking. High operating temperatures accelerate seal degradation, while improper installation can lead to misalignment and premature bearing failure. Internal leakage reduces flow efficiency, causing the bulldozer’s blade or attachments to operate slower than specified. Vibration and noise often indicate shaft or swash plate wear that requires immediate inspection.

Repairing the HRR130 pump involves complete disassembly, inspection, and measurement of all components. Damaged pistons,

SAUER DANFOSS roller M44 hydraulic pump

The test and repair process of the M44 and M46 main pumps from Sauer-Danfoss is conducted with precise engineering and numerical evaluation. Initially, the pump is removed from the hydraulic system, and a **preliminary inspection for leakage and pressure** is performed. System pressures are measured numerically using a digital pressure gauge for example, the standard inlet pressure is 6–8 bar, while the operating outlet pressure is checked up to 350 bar for the M44 and 400 bar for the M46. Pump flow at 1,500 RPM is measured between 150–165 liters per minute. The **input shaft torque** is evaluated with a torque meter up to 450–500 Nm to ensure proper power transmission.

In the second stage, internal components including the cylinder block, pistons, and swash plate are inspected with precision tools such as digital micrometers and wear gauges. The **maximum allowable deviation for piston diameter and cylinder bore is 0.02 mm**, and any component beyond this tolerance is replaced. O-rings and seals are replaced according to operating pressures of 350–400 bar and flow rates of 150–165 L/min. The drive shaft is tested for torque resistance and wear to ensure stable operation and prevent abnormal vibrations.

The final stage involves pump assembly and **numerical perfor

hyundai excavator 210 swing pump M2X146

The swing pump of the Hyundai 210 excavator, Kawasaki M2X146 model, is an axial piston motor with a swash plate design, engineered for the rotational movement of the excavator’s swing arm. This pump has a displacement of 145.7 cm³ per revolution, a nominal operating pressure of 30 MPa, and a maximum pressure of 37 MPa. Its maximum flow rate reaches 210 liters per minute, and rotational speed is up to 1650 rpm. These specifications enable the pump to deliver a torque of 12,800 Nm while ensuring precise control of the swing movement. The swash plate design and precise pressure and flow control maintain hydraulic system efficiency even under heavy operating conditions.

During repair, the pump is first removed from the hydraulic system and thoroughly cleaned to eliminate any suspended particles or contaminants. The cylinder block, drive shaft, swash plate, pressure plates, and springs are inspected using precision tools such as micrometers and gauges. O-rings, seals, and other consumable components are replaced, and friction surfaces are carefully refurbished. Pump pressure and flow are tested after repair to ensure performance meets factory standards, with no leakage or power loss.

After replacing and repairing damaged components, the pump is reassembled with precise torque

concrete mixer pump PV21

The PV21 and PV23 hydraulic pumps, manufactured by Sundstrand, are axial piston pumps designed for high-reliability operation in concrete mixer hydraulic systems. They can be used in both open and closed circuit systems, providing sufficient flow and pressure for heavy-duty concrete mixing. The PV21 has a displacement of 21 cm³ per revolution, while the PV23 displaces 23 cm³ per revolution. Maximum operating pressures reach 350 bar for PV21 and 360 bar for PV23, with maximum flows of 120 and 130 liters per minute, respectively. Each pump weighs approximately 55–60 kg, and the required input power at operational speed is around 100 kW.

The repair process begins with removing the pump from the hydraulic system and inspecting the housing and external connections for leaks or cracks. The cylinder block, pistons, swash plate, and drive shaft are measured using precision tools such as micrometers and gauges. Worn or damaged components are replaced to restore hydraulic performance and flow to factory specifications. All auxiliary components, including seals and O-rings, are also replaced to minimize leakage and prevent future failures.

After reassembly, the pump undergoes comprehensive performance testing. Operating pressure, output flow, input torque, and noise levels are mea

chopper combine pump repair

The hydraulic pump of a chopper combine is typically an axial piston or vane type, designed with a flow capacity between 80 and 120 liters per minute. It operates within a working pressure range of 200 to 250 bar and is responsible for supplying hydraulic oil to systems such as lift cylinders, steering, and the feeding mechanism of the cutter. Proper pump type selection and attention to flow capacity are critical to prevent efficiency loss and overheating of the hydraulic oil during harvesting operations.

The installation location of the chopper combine hydraulic pump is usually at the front of the engine, aligned with the power transmission shaft. The connection is often made through direct coupling or flange mounting to ensure mechanical power transfer without energy loss. At this position, high-pressure hoses and return lines to the hydraulic reservoir are attached, requiring precise sealing to prevent leakage and pressure drops. Any shaft misalignment can lead to increased vibration and significantly reduce pump lifespan.

The repair process of the chopper hydraulic pump includes disassembling all components, thoroughly cleaning them, inspecting piston and vane wear, and checking bearing tolerances with 0.01-millimeter accuracy. If scratches or dimensional changes greate

hyundai 912 pump A8VO55

The main hydraulic pump A8VO55, manufactured by Rexroth, is an axial piston pump with a dual design, used in open-circuit hydrostatic systems. It is applied in Hyundai 912 excavators and Liebherr machinery with the following specifications:

* **Displacement:** 2 × 54.8 cm³ per revolution
* **Maximum operating pressure:** 350 bar
* **Peak pressure:** 400 bar
* **Maximum flow:** 2 × 137 liters per minute
* **Input power at maximum speed:** 160 kW
* **Maximum input torque:** 611 Nm
* **Approximate weight:** 82 kg

These specifications demonstrate the pump’s high capacity to provide the necessary pressure and flow for optimal hydraulic system performance in heavy machinery.

During repair of the A8VO55 pump, it is first removed from the hydraulic system, and all external connections and components are inspected. Precision tools such as micrometers and gauges are used to assess the dimensions and condition of internal parts including pistons, swash plate, cylinder block, and drive shaft. Any worn or damaged components are replaced. After component replacement, the pump is carefully reassembled and subjected to performance testing to ensure pressure, flow, and torque meet factory specifications.

Finally, once proper performance is confirmed, the pump is reinstalled

PVH98 vickers hydraulic pump grader 120

The Eaton Vickers PVH98 hydraulic pump used in Caterpillar 120 graders is a variable displacement axial piston pump designed for high-pressure applications up to 280 bar. Its displacement ranges from 98 to 105 cc/rev depending on the swash plate angle, ensuring precise flow control between 120 and 180 liters per minute. The pump housing is made of high-strength alloy steel to withstand mechanical stress, while pistons and valves are precision-machined to maintain internal leakage below 2%. The PVH98 pump supports operating temperatures between -20°C and 90°C, and it requires ISO VG46 hydraulic oil for optimal performance.

During the repair process, the pump is removed and disassembled, with all components inspected for wear, scoring, or corrosion. Pistons, cylinder blocks, swash plates, and seals are replaced using OEM-certified parts. The shaft and rotor are balanced using dynamic testing to minimize vibration. Pressure and flow control valves are calibrated with high-precision gauges to ensure consistent hydraulic output within ±5% of factory specifications.

After reassembly, the pump undergoes bench testing under simulated load conditions. Flow and pressure are measured at various swash plate angles and temperatures to confirm adherence to technical specifications. Pr

N44 sauer danfoss bobcat pump repair

The repair process of the Bobcat M44 Sauer Danfoss hydraulic travel pump requires precise diagnostic analysis, as the pump operates at pressures up to 350 bar and flow rates near 90 liters per minute. Mechanical wear of pistons, valve plates, or bearings can reduce volumetric efficiency by more than 15 percent, leading to significant loss of travel power. Early symptoms often include unusual vibration, high oil temperature exceeding 85°C, and reduced response time in forward or reverse drive cycles.

Common causes of hydraulic pump failure in the Bobcat M44 include oil contamination above ISO 18/16/13 levels, cavitation due to improper suction line sizing, and overheating caused by insufficient cooling. Even a 10 µm particle entering the pump chamber can damage the swash plate surface, reducing service life by over 30 percent. Preventive maintenance such as oil filtration checks, seal inspection, and pressure relief valve calibration is critical for extending operational hours.

Repair costs for a Bobcat M44 Sauer Danfoss travel pump vary from 1,200 to 2,500 depending on the extent of component replacement, labor, and testing procedures. A full rebuild may require up to 12 working hours, including disassembly, precision lapping of valve plates, piston shoe replacement, and

forklift hydraulic pump rexroth repair

The Rexroth A10VSO hydraulic pump is an axial piston pump with variable displacement, commonly used in open-circuit hydraulic systems such as forklifts. These pumps are available in displacement ranges from 18 to 140 cm³/rev, providing flow rates between 59 and 252 liters per minute with a maximum operating pressure of 280 bar. Depending on the model, the pump speed ranges from 1,800 to 3,300 rpm. The swash plate design and compact construction ensure low noise operation and long service life, making it suitable for heavy-duty, high-frequency applications.

Repairing the A10VSO pump requires precision and technical expertise. The process typically begins with initial inspection, identifying issues such as pressure drop, unusual noise, vibration, or oil leakage. The pump is then disassembled following safety protocols, and internal components including pistons, swash plate, bearings, shaft, and O-rings are carefully inspected for wear or damage. Cleaning of all components and replacement of worn parts with original or equivalent-quality components is critical for restoring performance.

Finally, the pump is reassembled with precise adjustments, including setting the swash plate angle. A comprehensive performance test is conducted to verify flow rate, pressure output, and smoo

john deere 955 combine pump repair

Repairing the hydraulic pump of the John Deere 955 combine requires a precise inspection of the mounting position and its connection to the main hydraulic system. The pump is usually located on the engine’s side, near the high-pressure hose lines, and supplies hydraulic oil for the lifting cylinders and steering system. Its mechanical connection is often made using a flange or direct coupling to ensure smooth power transfer without vibrations. During the repair process, it is critical to make sure no leakage remains around O-rings and hose joints.

Reputable brands that provide spare parts for the John Deere combine hydraulic pump include Sauer Danfoss, Bosch Rexroth, and Parker, all known for producing components with tight tolerances. During overhaul, it is recommended to use original repair kits and bearings designed to withstand pressures up to 250 bar. In addition, wear on vanes or pistons should be checked with a digital caliper and micrometer to guarantee precision and maintain proper pump efficiency.

A key stage in the John Deere 955 pump repair process is the final pressure and flow test after reassembly. This test is typically carried out with a hydraulic test bench capable of simulating operating pressures up to 300 bar. The flow rate should remain within the ra

Ferguson tractor hydraulic pump repair

Repairing the hydraulic pump of a Massey Ferguson 285 tractor is a highly specialized process that requires mechanical knowledge and precise tools. The pump is responsible for transmitting hydraulic oil pressure to the system, and any malfunction can reduce the efficiency of lifting arms and agricultural implements. Common failure symptoms include oil leakage, sudden pressure loss, and unusual noise during operation. Identifying these signs early and performing timely repairs prevents further damage to other hydraulic components.

During the repair of the Massey Ferguson 285 hydraulic pump, the internal parts such as gears, O-rings, and valves must be carefully inspected. Cleaning the components from oil residues and metallic deposits is essential, as contamination can cause wear and shorten the pump’s service life. Using high quality hydraulic oil that complies with the specifications of the Massey Ferguson tractor ensures reliable performance, especially under demanding working conditions.

After replacing or repairing the worn components of the Massey Ferguson 285 hydraulic pump, the system must be properly bled. Air bleeding prevents the formation of bubbles in the hydraulic circuit, ensuring smooth cylinder operation. A final performance test, including measuring the o

New holland combine hydraulic pump repair

The hydraulic pump of a New Holland combine is typically an axial piston type with a swash plate design or, in some models, a vane type with a flow capacity between 90 and 130 liters per minute. This pump can generate an operating pressure range of 220 to 260 bar and is mainly responsible for powering the steering system, cutting cylinders, and feeding mechanisms. Correct pump type selection and monitoring of output flow under heavy working conditions are crucial to prevent efficiency loss and hydraulic oil overheating.

The mounting location of the New Holland combine hydraulic pump is usually on the engine’s side, close to the main gearbox. This placement allows the pump to receive direct mechanical power from the drive shaft, and the connection is commonly made via a flange coupling. At this point, high-pressure lines and return hoses to the hydraulic reservoir are installed, which must be sealed with O-rings designed to withstand pressures up to 250 bar to avoid leakage.

Repairing the New Holland combine hydraulic pump involves disassembling internal components, inspecting pistons, valves, and bearings, and measuring tolerances precisely with a digital micrometer. If wear greater than 0.05 millimeters or cracks in the housing are detected, the affected parts must be re

KOMATSU excavator pc300 swing pump

The swing pump of the Komatsu PC300-7 excavator is a precision hydraulic unit responsible for supplying oil to the swing motor of the upper structure. This pump is a gear-type design with a volumetric capacity of approximately 45 to 55 liters per minute and an operating pressure of 280 bar. The housing is made of alloy steel with a hardness of 210 to 230 Brinell, ensuring excellent wear and fatigue resistance. Its drive shaft is supported by rolling bearings with a diameter of 45 millimeters for stability and durability.

In terms of type, the Komatsu PC300-7 swing pump operates as an internal gear hydraulic unit that directs oil into the swing motor circuit through the rotation of its driving gear. Heat-resistant O-rings capable of withstanding up to 120 degrees Celsius prevent leakage under high pressure. The pump achieves a volumetric efficiency greater than 92 percent under standard conditions, which ensures smooth and precise swing system performance during heavy-duty excavation tasks.

The repair process of the swing pump involves complete disassembly of the housing, inspection of the gears for wear or micro-cracks, and measurement of radial clearance with a feeler gauge. If the clearance exceeds 0.08 millimeters, gear replacement becomes necessary. Bearings and seals m

Concrete machine hydraulic pump repair

The REXROTH A4VG concrete mixer boom hydraulic pump is an axial piston variable displacement type, capable of adjusting flow according to load requirements. Its nominal power reaches up to 75 kW, and flow rate ranges between 50 and 180 liters per minute. Maximum operating pressure is 350 bar, and oil temperature is controlled between 40 and 70 degrees Celsius under standard conditions. This pump supplies hydraulic force to lift cylinders and mixer rotation and requires precise monitoring of pressure, flow, and operating temperature.

The repair process includes complete disassembly of the pump body, inspection of the shaft and bearings, and checking pistons and gears. O-rings, seals, and gaskets are commonly replaced. Internal and external leakage tests, volumetric flow measurement, and output pressure verification are performed before and after repair. Adjusting the swashplate angle for accurate flow is essential. Using precision tools and hydraulic test equipment reduces repair errors to less than 2 percent.

Consumable parts include pistons, swashplate, shaft bearings, O-rings, and high-pressure washers. Repair costs depend on part condition and usually range between 25 and 40 percent of the new pump price. After reassembly, the pump is tested at standard pressures of 250�

Casappa hydraulic pump repair

The hydraulic pump of the backhoe loader brand CASAPPA is one of the key components of the hydraulic system, responsible for supplying the required flow and pressure of hydraulic oil. These pumps are usually gear or piston type, with flow capacities ranging from 60 to 120 liters per minute and operating pressures between 180 and 250 bar, providing high efficiency in energy transmission. The precise gear design and optimized sealing system significantly improve performance, reduce leakage, and increase the overall service life of mechanical components.

The main reasons for CASAPPA hydraulic pump failure are oil contamination, cavitation, overload, or high operating temperatures. Early signs of malfunction include pressure drops, unusual noise, and reduced cylinder movement speed. Continued operation with a damaged pump can lead to severe issues in valves and control systems, which drastically increase the overall repair costs. Timely maintenance and oil monitoring are essential to minimize these risks.

Repairing a CASAPPA hydraulic pump typically involves disassembly, inspection of internal wear surfaces, checking seals, and replacing O-rings and bearings. In cases of major damage to gears or pistons, replacement of main components becomes necessary. Repair costs usually ran

Komatsu PC400-6 travel pump repair

The travel hydraulic pump of the Komatsu PC400-6 excavator is an axial piston pump with variable displacement, specifically designed to supply the required traction force. Its operating pressure is approximately 320 bar, and the flow rate ranges between 180 to 220 liters per minute. The drive shaft, with a diameter of 50 millimeters, is supported by rolling bearings, while the pump body is constructed from high-strength alloy steel with superior wear resistance. Precision-engineered oil channels and internal valve plates minimize internal leakage and maintain volumetric efficiency above 90 percent.

Pump performance is highly influenced by operating pressure and hydraulic oil condition. A flow rate drop below 160 liters per minute or a pressure loss exceeding 15 percent indicates piston wear, bearing damage, or valve plate issues. Excessive oil temperature above 85 degrees Celsius can damage O-rings and cause internal leakage. Unusual vibration and knocking noise during movement are also key indicators of travel pump malfunction.

The repair process involves complete disassembly, careful inspection of pistons, valve plates, and bearings, and replacement of worn or damaged components. After cleaning and reassembly, bolts are tightened to specified torque values, and the pump i

john deere 1055 combine pump repair

The hydraulic pump of the John Deere 1055 combine is typically a vane or piston type with a flow capacity of around 70 to 90 liters per minute. This pump can generate an operating pressure of up to 220 bar and is responsible for supplying hydraulic oil to the lifting cylinders, steering system, and auxiliary mechanisms. Proper selection of pump type and maintaining the required flow rate are essential to prevent efficiency loss and excessive system temperature rise.

The mounting location of the John Deere 1055 hydraulic pump is usually at the front section of the engine, aligned with the power transmission coupling. This placement allows direct mechanical power transfer from the engine and is connected via a flange or flexible coupling to the output shaft. High-pressure hoses and return lines to the hydraulic reservoir are also attached here, making accurate sealing of all joints critical to reliable operation.

The repair process of the John Deere 1055 hydraulic pump involves disassembling the unit, inspecting vane or piston wear, and checking bearings using precision tools such as micrometers. If scratches or tolerance deviations greater than 0.05 millimeters are detected, the component must be replaced. After reassembly, a pressure test on a hydraulic test bench is perfor

Komatsu PC400-7 main pump repair

The main hydraulic pump of the Komatsu PC400-7 excavator is a variable displacement axial piston pump, commonly identified by part numbers such as 708-2H-00027, 708-2H-00026, and 708-2H-00022. This pump is designed to deliver high volumetric flow rates and operate under high-pressure conditions, ensuring efficient power transmission for the excavators hydraulic system.

In terms of specifications, the pump typically operates at a maximum pressure of approximately 370 bar 5,365 psi and provides a flow rate around 690 liters per minute L/min. These parameters are crucial for the optimal performance of the excavators functions, including arm, boom, and swing operations.

The repair process for this hydraulic pump involves several critical steps to ensure its proper functioning:

Disassembly: Carefully remove the pump from the excavator, taking precautions to avoid damage to connected components.

Inspection: Thoroughly examine the pump for signs of wear, corrosion, or damage, focusing on components such as pistons, cylinder block, and swashplate.

Cleaning: Clean all parts using appropriate solvents to remove any contaminants that could affect performance.

Component Replacement: Replace any worn or damaged components with OEM parts to maintain the pumps integrity and pe

PVH131 Vickers pump repair

The Vickers PVH131 hydraulic pump used in the Caterpillar 140G grader is an axial piston variable displacement pump designed for operating pressures up to 300 bar. The pump flow ranges between 131 and 145 cc per revolution, providing hydraulic output with ±5% accuracy. Its housing is made from high-strength steel, and pistons, swash plate, and valves are precision-machined to ensure internal leakage below 2%. The recommended operating temperature range is -20 to 90°C, and ISO VG46 hydraulic oil is advised for optimal performance.

Common failures in PVH131 pumps arise from piston wear, cylinder block scoring, swash plate degradation, or valve clogging. Contaminated fluid or delayed oil replacement can reduce flow, increase internal pressure, and damage rings and O-rings. Shaft or bearing failure is another frequent cause of reduced performance and severe vibration in the 140G grader hydraulic system.

During specialized repair, the pump is fully disassembled, and all components are inspected for wear, corrosion, or damage. Damaged parts are replaced with OEM components, and the shaft and rotor are dynamically balanced. Pressure and flow control valves are recalibrated, and the pump is tested under simulated load conditions. Flow, pressure, and temperature measurements confi

A4SO and A10VSO rexroth pump repair

The Rexroth A4SO and A10VSO hydraulic pumps used in industrial press machines are axial piston pumps with variable displacement. They operate at pressures of 250 to 320 bar and flow rates from 20 to 350 liters per minute. The housing is made of hardened steel, and internal components are precision-machined to reduce wear and leakage. Seal rings and O-rings ensure stable performance at temperatures between 30°C and 90°C. The design allows for rapid replacement of internal components, minimizing downtime and ensuring consistent machine operation.

The main causes of failure include wear of pistons and cylinders, damaged O-rings, contamination of hydraulic oil, and operation under excessive pressure. Internal leakage reduces efficiency and output flow. Using hydraulic oil with incorrect viscosity or contaminated oil shortens pump lifespan. Malfunctioning control valves and pressure relief valves can also disrupt industrial press operation, necessitating specialized repair.

The repair process involves disassembling the pump, inspecting, and replacing pistons, cylinders, and O-rings. After component replacement, pressure and flow tests are conducted to ensure optimal performance. In severe cases, the housing may be rebuilt or shafts and bearings replaced. All replacement parts

KAWASAKI M5X130 pump repair

Hydraulic travel pumps for the Hyundai 210 excavator, Kawasaki models M5X180 and M5X130, are axial piston motors with swash plate design. These motors are engineered for precise and stable rotational performance in excavators. The M5X180 model has a displacement of 180.1 cm³ per revolution, nominal pressure of 32.4 MPa, maximum pressure of 39.2 MPa, maximum speed of 1680 rpm, maximum flow of 240 liters per minute, and maximum torque of 16,500 Nm. The M5X130 model has a displacement of 129.2 cm³ per revolution, similar nominal and maximum pressures, maximum speed of 1850 rpm, maximum flow of 240 liters per minute, and maximum torque of 13,400 Nm.

During repair, the pump must first be removed from the system and all components carefully inspected. Parts such as the cylinder block, swash plate, drive shaft, spring plate, pressure plate, separator plate, friction plate, and O-ring kit should be examined and replaced if necessary. Using original or high-quality components is essential to maintain motor performance and longevity.

When reassembling, all components must be installed with precision using accurate measurement and adjustment tools. After assembly, the motor should undergo performance testing to ensure that technical specifications such as pressure, flow, and torque

Concrete pump accumulator

The accumulator used in concrete pumps is typically of the bladder type, designed to withstand working pressures between 250 and 350 bar. Its body is made of high-strength carbon steel with a tensile resistance above 950 MPa and is coated with anti-corrosion protection. The working volume is selected based on the pump’s capacity, usually ranging from 4 to 20 liters. The nitrogen pre-charge pressure is generally set between 90 and 120 bar to maintain hydraulic system efficiency.

The installation location of the accumulator in a concrete pump is on the main hydraulic line, close to the hydraulic pump, where it can absorb pressure surges and flow fluctuations. It is typically mounted near the control valve or directly on the hydraulic manifold, preferably in a vertical position. This installation ensures stable operation during sudden load changes and helps reduce wear on system components.

The capacity of the accumulator is determined by the hydraulic motor power and the pump’s output flow rate. For example, in concrete pumps with a delivery capacity of 60 to 80 cubic meters per hour, a 10-liter accumulator is commonly used. In larger models with outputs above 100 cubic meters per hour, 15- to 20-liter accumulators are applied. Proper capacity selection ensures sufficient

CAT12G grader hydraulic pump

The CAT12G G120 grader hydraulic pump is a radial piston variable displacement pump with an operating pressure typically between 280 and 320 bar. The pump consists of a rotor, pistons, control valves, and pressure relief components, accurately regulating oil flow within ±5%. Under normal operation, the pump flow ranges from 140 to 180 liters per minute, and oil temperature should not exceed 90°C. Repairs require specialized hydraulic tools and flow/pressure calibration equipment to maintain the manufacturer’s technical specifications.

During the repair process, the pump is removed from the grader, and all components are inspected for wear, scoring, and corrosion. Pistons, rings, and seals are replaced with OEM-standard parts to reduce internal leakage below 2%. The shaft and rotor undergo vibration and balance testing to minimize noise and vibration. Control and pressure valves are tested with precise gauges to ensure smooth, stable flow.

After reassembly, the pump is tested under real pressure and flow conditions. Flow measurements at 75–85°C must stay within ±5 bar of the factory specification. Proper repair extends service life up to 8,000 hours and reduces oil consumption and hydraulic system wear. Routine maintenance every 500 operating hours, including pressur

Roquet hydraulic pump repair

The Roquet hydraulic pump in backhoe loaders is usually of the gear or piston type, with a nominal flow rate of 60 to 120 liters per minute and a working pressure of 250 to 320 bar. These pumps are made of wear-resistant steel alloys and cast iron housings, which enhance service life and minimize deformation under cyclic loads. The internal design includes hardened gears or precisely machined pistons, assembled with tolerances of less than 5 microns.

In terms of mechanical performance, the Roquet pump can deliver stable power to the boom and bucket cylinders, achieving a volumetric efficiency above 92 percent. Ball bearings with a hardness of 60 HRC and seals made of NBR O-rings resistant to temperatures up to 120°C are used. Vibration levels under full load remain below 1.5 mm/s, reflecting the precision of the pump’s engineering.

Maintenance of Roquet hydraulic pumps in backhoe loaders involves checking gear or piston wear, controlling internal leakage, and replacing worn O-rings. If output flow decreases to less than 80 percent of the rated capacity, a 280-bar pressure test is required to determine efficiency loss. To extend pump life, it is recommended to replace the hydraulic filter every 2000 working hours and use standard ISO VG 46 oil. Employing original Roquet s

Danfoss diesel pump model BFP21L5

The Danfoss diesel pump model BFP21L5 is an advanced and efficient fuel supply unit designed for oil burners, widely used in industrial and commercial heating systems. This single-stage gear pump features a left-hand rotation and is built with corrosion-resistant alloys and hardened steel components to ensure durability and long-term reliability. Its design allows it to withstand high operating pressures while improving the overall efficiency of the heating system. With a quiet operation, easy-to-service structure, and integrated safety features, the BFP21L5 is engineered for dependable performance in demanding environments.

From a technical standpoint, the BFP21L5 pump can generate a working pressure of up to 25 bar and offers an adjustable flow rate to match the needs of the system. It includes a built-in solenoid valve that enables precise control of diesel flow, preventing overfeeding or irregularities in fuel delivery. The internal filter is designed to block fine particles from entering and damaging sensitive components of the pump. Another key advantage of this model is its compatibility with electronic burner controllers, enhancing system synchronization and operational safety. Due to its high durability, energy efficiency, and solid engineering, the BFP21L5 is a smart

D155 Komatsu hydraulic pump repair

The hydraulic pumps in Komatsu bulldozer models D65, D85, and D155 are critical components that convert mechanical engine power into hydraulic energy, enabling efficient operation of the dozers blade, steering, and other functions. These pumps are typically piston-type, offering high efficiency and durability under demanding conditions.
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For instance, the Komatsu D65PX-18 model is equipped with a piston-type hydraulic pump delivering a discharge flow of 248 liters per minute 65.5 U.S. gallons per minute at rated engine RPM. The relief valve setting is calibrated to 27.9 MPa approximately 4,050 psi, ensuring optimal pressure regulation within the hydraulic system. This configuration supports the Closed-Center Load Sensing System CLSS, which provides precise and responsive control for efficient simultaneous operations.
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Similarly, the Komatsu D85-18 model features a piston-type hydraulic pump with a discharge flow capacity of 331 liters per minute 87.4 U.S. gallons per minute at rated engine RPM. The relief valve is set at 22.6 MPa approximately 3,270 psi, facilitating the CLSS for enhanced operational efficiency. These specifications ensure that the hydraulic system can handle the high demands of the dozers operations, provid

Komatsu WA470 hydraulic pump repair

The hydraulic pump of the Komatsu 470 wheel loader is an axial piston type with a swash plate, capable of operating at working pressures up to 320 bar. This pump supplies hydraulic power for the lift cylinders, steering system, and auxiliary hydraulic functions. The original brands commonly used are Komatsu or Kawasaki Japan, both known for precise engineering and long service life under demanding mining and construction conditions.

The head and flow rate of the Komatsu 470 hydraulic pump range between 280 and 320 liters per minute at 1800 rpm, depending on the model. The internal flow passages and control system are designed to optimize efficiency and reduce pressure loss. This high hydraulic capacity ensures smooth steering response and fast, stable movement of the lift arms, which is critical for loading and material handling operations.

The repair process of the 470 hydraulic pump begins with complete disassembly and cleaning of all components using a moisture-free industrial solvent. Critical parts such as pistons, cylinder block, bearings, and swash plate are then inspected with micrometer precision. If wear exceeds 0.02 millimeters, replacement or re-machining is performed. Finally, the pump is reassembled and tested at 300 bar pressure and nominal flow to verify pro

komatsu forklift hydraulic pump repair

Repairing the hydraulic pump of a Komatsu forklift involves accurately diagnosing faults, disassembling the pump, and inspecting internal components. Common issues include oil leakage, pressure loss, and unusual noise. Before repair, the hydraulic system should be drained and filters replaced to prevent contamination. Using precise tools and measuring pressure and flow during post-repair testing ensures system safety and optimal performance.

Komatsu forklift hydraulic pumps are typically gear-type or variable displacement piston pumps with high capacity. Pump pressure ranges from 100 to 200 bar depending on the forklift model, and flow rate is between 40 to 80 liters per minute. These technical specifications allow the pump to generate sufficient force to lift heavy loads and operate hydraulic cylinders. Proper pump selection and accurate adjustment of pressure and flow are critical for system efficiency and longevity.

During Komatsu hydraulic pump repair, attention must be paid to worn gears, pistons, and O-rings. Using standard hydraulic oil and replacing rotors and bushings when worn restores pressure and flow to factory specifications. Inspecting internal leaks and performing functional tests after assembly ensures the forklift’s hydraulic system operates efficiently

HEPCO bulldozer hydraulic pump repair

The hydraulic pump of a HEPCO bulldozer functions as the core of the hydraulic system, responsible for supplying the required pressure to cylinders and the steering unit. These pumps are typically axial piston type with variable displacement control, operating at pressures between 280 and 320 bar and delivering a flow rate of 120 to 180 liters per minute. The precise design of the shaft and internal seals ensures longer service life and minimizes hydraulic leakage.

For repairing the HEPCO bulldozer hydraulic pump, pressure and flow tests should first be carried out to verify performance accuracy. If pressure drops more than 15% or the flow rate falls below the nominal value, a complete disassembly of the pump is required. Careful inspection of piston surfaces, valve plates, and bearings is crucial, since wear beyond 0.05 mm indicates the need for part replacement.

During the repair process, after cleaning and replacing O-rings and seals, all moving parts must be measured with calipers and micrometers for precision. Reassembly requires the use of special hydraulic assembly grease and tightening bolts to the recommended torque range of 70 to 120 Nm. Finally, leakage and pressure tests under real load conditions must be performed to ensure the proper function of the HEPCO bull

Danfoss diesel pump model BFP21L3

The Danfoss diesel pump model BFP21L3 is a powerful and reliable component designed for fuel supply systems in oil burners, widely used in industrial and commercial heating applications. This gear-type pump operates in a single-stage configuration and typically features a left-hand rotation. Its construction includes a durable shaft, precision-engineered gears, and a corrosion-resistant alloy housing that ensures long-lasting performance under harsh working conditions. The modular design of the pump allows for easy disassembly and maintenance, and its flexible configuration makes installation in a wide range of systems straightforward.

From a technical perspective, the BFP21L3 pump is capable of delivering a working pressure of up to 25 bar, making it suitable for consistent and stable fuel feed in burner systems. Its flow rate can be adjusted based on system requirements, and it features an integrated solenoid valve for precise fuel flow control. With low power consumption and a quiet operation design, this pump enhances energy efficiency while minimizing the need for frequent maintenance. An internal filter helps prevent the entry of impurities, and compatibility with burner controllers adds to its functionality—making the BFP21L3 a reliable and efficient choice for heatin

DAYTON SS304 steel pump

This stainless steel pump, manufactured as a three-phase unit with a maximum power of 2 horsepower, is used for transferring fluids with moderate corrosiveness at high volumes and flow rates. The electric motor connected to the stainless steel 304 pump by DAYTON is either of NEMA type with an IEC frame and operates on DC power at a voltage of 208-230/460 volts.

This series of stainless steel pumps has a maximum suction lift of 7.6 meters. From a fluid mechanics perspective, the maximum suction capability for the most powerful pump at sea level is 10 meters, with a maximum discharge head H of 68 feet. Since this stainless steel pump is centrifugal, the highest head is achieved at the lowest flow rate, which in this case is 24 gallons per minute GPM.

Naturally, at lower pumping heights, the volumetric capacity of the stainless steel grade 304 pump increases, reaching a flow rate of 130 GPM at the minimum head of 5 feet. Mechanical seals made of carbon or stainless steel minimize leakage in this pump series. The inlet valve is threaded and flange-free with a 1 1/2 inch size, allowing for high suction and discharge flow rates.

Due to its considerable flow rate and stainless steel construction, which minimizes chemical reactions with liquids, this pump is widely used in food

Komatsu PC300 excavator main pump

The main hydraulic pump of the Komatsu PC300 excavator is typically an axial piston pump with a variable swashplate design, capable of delivering high operating pressure. This pump provides a flow rate of approximately 2×240 liters per minute at a rated working pressure of 320 bar, supplying the necessary power for boom, arm, and swing operations. Its dual-circuit configuration increases efficiency and minimizes pressure losses in heavy-duty hydraulic systems.

The head of the PC300 main pump is generally set between 280 and 320 bar, with a maximum pressure capacity up to 350 bar. The internal design includes hardened steel pistons with a diameter of around 22 to 24 millimeters, operating at a rotational speed of 1800 to 2000 RPM. Precision sealing within the cylinder block reduces internal leakage, ensuring a volumetric efficiency greater than 90 percent.

The repair process of the PC300 hydraulic pump involves complete disassembly, inspection of pistons and the cylinder block, and replacement of worn components. Common failure signs include wear on piston shoes and sliding plates. After reconditioning or replacement, reassembly must be performed with specified torque values, followed by calibration on a hydraulic test bench at 300 bar pressure and 240 liters per minute flo

KATO crane hydraulic pump repair

The sale and repair of hydraulic pumps for KATO cranes, especially models using Uchida pumps, require high technical expertise. These pumps, such as A10VD43SR and AP2D36, are used in heavy-duty KATO cranes like the HD307 and NK1200. Sourcing these parts from reputable international suppliers such as Alibaba and Made-in-China is feasible. To ensure quality and authenticity, selecting suppliers with proven track records and positive customer reviews is recommended.

For repairing Uchida hydraulic pumps, companies like Hydraulex and Rexton Hydraulic provide specialized services. These companies use experienced technicians and advanced equipment to rebuild faulty pumps according to OEM standards. Hydraulic pump repair demands precision and technical experience to maintain optimal crane performance. If local services are unavailable, shipping the pump to these centers can be a suitable option.

For spare parts supply and repair services in the Middle East, collaborating with official KATO dealers or reputable companies in neighboring countries like the UAE and Saudi Arabia is advisable. These companies typically have access to original parts and specialized technical support. For further consultation or detailed information, contacting these authorized representatives is recommend

Komatsu WA800 hydraulic pump repair

The hydraulic pump of the Komatsu WA800 wheel loader is typically an axial piston pump with a swash plate design, capable of operating at pressures up to 350 bar. This pump supplies the required oil flow for the hydraulic system, including the boom and bucket cylinders. The original brand used in this machine is usually Komatsu or Kobe, both recognized for their high durability and performance under demanding mining conditions.

The flow capacity of the WA800 hydraulic pump varies between 750 and 900 liters per minute at the rated speed of 1800 rpm, depending on the specific model. Such a high flow rate ensures smooth and responsive operation of hydraulic components such as lift cylinders and the steering system. The optimized internal oil passages are engineered to minimize pressure losses, thereby improving overall hydraulic efficiency.

The overhaul process of the WA800 hydraulic pump includes inspection of the cylinder block, replacement of pistons, evaluation of the swash plate, and control of internal bearings. Wear tolerances in these components are generally kept below 0.02 millimeters to maintain optimal efficiency. After reassembly, a performance test at 300 bar pressure and the nominal flow rate is required to verify leakage-free operation and stable performance.

Toyota forklift hydraulic pump repair

Repairing the hydraulic pump of a Toyota forklift involves accurately diagnosing faults, disassembling the pump, and inspecting internal components such as the rotor, gears, and O-rings. Before repair, the hydraulic system should be drained and filters replaced to prevent contamination. Using pressure and flow measurement tools for numerical diagnostics ensures precise fault identification and reduces the risk of recurring pump failures.

Toyota hydraulic pumps are typically gear-type or piston-type with operating pressures between 150 and 180 bar and flow rates of 45 to 75 liters per minute. The original TOYOTA brand, whether domestic or OEM, provides high-quality materials and assembly. Key numerical specifications include pressure tolerance, volumetric efficiency, and maximum designed flow, which are critical for operating lift cylinders and hydraulic steering systems.

During the repair process, special attention must be paid to worn gears, bushings, and internal components. Using standard hydraulic oil, replacing worn parts, and testing pressure and flow after reassembly restores the pump’s performance to factory specifications. This process ensures the Toyota forklift hydraulic system operates safely and efficiently at full capacity.

construction hydraulic pump

The hydraulic pump for construction machinery is designed to generate stable pressure and accurately transfer hydraulic power within the motion systems of heavy equipment. It is an axial piston type featuring a swash plate mechanism with an automatic pressure control system. The displacement range is between 68 and 185 cubic centimeters per revolution, with a rated working pressure up to 340 bar. The housing is made of ductile cast iron GGG45 with a compressive strength of 370 MPa. The inner cylinder surface is reinforced with a 20–25 micron hard chrome layer to minimize wear. It operates reliably between -25°C and +115°C and is built for heavy-duty conditions.

Hydraulic pumps used in construction equipment achieve overall efficiency above 95 percent and utilize optimized flow channels to reduce pressure losses. The input shaft is made of 34CrNiMo6 alloy steel, heat-treated for superior fatigue and torque resistance. The sealing system includes FKM O-rings capable of withstanding high temperatures and pressures up to 400 bar. Tapered roller bearings with a 45 kN radial load capacity ensure mechanical stability and service life exceeding 14,000 hours. These features make the pump an ideal choice for loaders, excavators, and graders.

construction hydraulic pump

The construction hydraulic pump is designed to provide consistent hydraulic power for heavy-duty equipment such as excavators, loaders, and graders. It features an axial piston mechanism with a swash plate configuration and a displacement range between 50 and 185 cubic centimeters per revolution. The standard operating pressure is 300 bar, while peak pressure capacity reaches up to 420 bar. The pump housing is made of compact aluminum alloy with a 20–30 micron hard chrome coating for enhanced wear resistance. It operates reliably across temperatures from -30°C to +115°C under fluctuating thermal conditions.

Construction hydraulic pumps achieve over 94 percent volumetric efficiency with a straight-flow design that reduces energy losses. The main shaft is made from fatigue-resistant alloy steel treated by nitrocarburization for surface strength. The sealing system includes FKM O-rings capable of withstanding 380 bar pressure and 200°C temperature. Tapered roller bearings with a 45 kN radial load capacity extend operational life beyond 13,000 hours. This configuration ensures stable operation, lower energy consumption, and improved hydraulic performance in demanding construction environments.

construction hydraulic pump

The hydraulic pump for construction machinery is designed to provide a consistent flow of pressurized oil in motion and control circuits of heavy-duty equipment. It is an axial piston type featuring a swash plate design and variable flow control system. The displacement capacity ranges from 70 to 190 cubic centimeters per revolution, with a continuous working pressure up to 330 bar. The housing is made of ductile cast iron GGG40 with a compressive strength of 350 MPa. The internal cylinder is coated with 25-micron hard nickel to enhance wear resistance and extend service life. The operating temperature range is from -30°C to +120°C.

Construction hydraulic pumps are manufactured with over 94 percent volumetric efficiency and straight-flow design to minimize energy losses. The input shaft is made from alloy steel treated with a nitriding process for high fatigue resistance. The sealing system utilizes FKM O-rings capable of withstanding 380 bar pressure and 200°C temperature. Roller bearings with a 43 kN radial load capacity ensure stable performance and service life exceeding 13,000 hours. These pumps deliver reliable and durable performance in loaders, bulldozers, and excavators.

CNC hydraulic pump repair

Repairing a gear-type hydraulic pump for a CNC cutting machine involves disassembling the housing, inspecting gear and shaft wear, and replacing pressure O-rings. Common pump codes include PV2R, PVM, and GPV, which operate reliably in CNC connections under 140–210 bar pressure. ISO VG 46–68 hydraulic oil is typically used to reduce wear and maintain pump precision. Inspecting seals and gaskets prevents internal leakage and pressure drops. Adjusting gear clearance and checking bearings extends pump life up to 5000 operating hours. The pressure gauge on the outlet line should show less than a 5-bar deviation from the manufacturer’s standard.

Consumable parts include gears, shafts, O-rings, and high-pressure seals, usually made from steel with 55–60 HRC hardness. Common failures include gear wear, shaft corrosion, and seal cracking. During repair, thorough oil flushing and debris inspection are essential. Operating pressure should be 120–210 bar with a volumetric flow of 20–60 liters per minute within ±3% accuracy. Shaft vibration above 0.5 mm indicates imbalance and requires realignment. Pump operating temperature should not exceed 75°C.

hydraulic pump for construction machinery

The hydraulic pump for construction machinery is designed to provide steady flow and high pressure in the control and motion circuits of heavy-duty equipment. It is an axial piston pump with a swash plate and internal pressure compensation mechanism. The displacement per revolution ranges from 70 to 200 cubic centimeters, with continuous operating pressure up to 350 bar. The housing is made of ductile cast iron GGG50 with a tensile strength of 500 MPa. The inner cylinder surface is coated with 25-micron hard nickel to enhance wear resistance. The pump maintains stable efficiency in temperatures from -30°C to +120°C under heavy-duty conditions.

Hydraulic pumps for construction equipment are manufactured with over 94 percent volumetric efficiency and a precisely engineered lubrication system. The drive shaft is made from 42CrMo4 alloy steel with deep heat treatment for high torsional strength. The sealing system uses FKM O-rings resistant to 400 bar pressure and 200°C temperature. Tapered roller bearings with a 45 kN radial load capacity extend service life beyond 13,000 hours. These pumps deliver reliable and continuous power transmission in excavators, loaders, and graders.

hydraulic steering pump

The hydraulic steering pump is designed for a flow capacity of 80 to 120 liters per minute and an operating pressure of 120 bar. The body is made of high-strength aluminum alloy with low weight. Variable displacement is adjustable via the pressure control valve, providing volumetric efficiency above 92 percent. The pump shaft can withstand torque up to 250 Nm and features high concentricity to minimize vibration. The internal lubrication system includes gears and bearings with a minimum friction coefficient of 0.02. The pump has corrosion-resistant bolts and a heat-resistant coating up to 120 degrees Celsius.

This pump is compatible with various automotive and industrial hydraulic steering systems. Standard flange and shaft dimensions allow quick installation without structural modifications. The permissible operating temperature ranges from -30 to +90 degrees Celsius, with vibration resistance up to 15g. Hydraulic fluids with viscosity between 15 and 68 mm²/s are recommended. Overall system efficiency exceeds 88 percent, and noise levels are under 68 dB. All internal components comply with ISO 6344 and withstand a test pressure 1.5 times the working pressure.

construction hydraulic pump

The hydraulic pump for construction machinery is designed to provide the required hydraulic power for steering, lifting, and power transmission systems. It is an axial piston type with a swash plate and automatic pressure compensation mechanism. The displacement capacity ranges from 65 to 200 cubic centimeters per revolution, with a continuous operating pressure of 320 bar. The housing is made of ductile cast iron GGG50 with a tensile strength of 500 MPa. The inner cylinder surface is coated with 30-micron hard chrome to improve wear resistance. The operating temperature range is from -25°C to +115°C, and overall efficiency exceeds 93 percent.

Hydraulic pumps for construction equipment are equipped with roller bearings supporting a 45 kN radial load capacity. The input shaft is made from hardened 42CrMo4 alloy steel for superior mechanical strength. The sealing system uses FKM O-rings resistant to pressures up to 400 bar and ISO VG 46 hydraulic oils. The 30-degree angled input shaft minimizes vibration and mechanical oscillation. These pumps deliver continuous operation up to 13,000 hours and are widely used in excavators, loaders, and bulldozers.

hydraulic pump

The construction hydraulic pump is engineered to deliver precise and continuous hydraulic energy within the power systems of heavy-duty machinery. It features an axial piston design with a swash plate mechanism and a displacement range between 60 and 195 cubic centimeters per revolution. Continuous working pressure is rated at 310 bar, while peak pressure can reach 420 bar. The pump housing is made of die-cast aluminum alloy with a 25-micron hard chrome coating. It maintains stable performance under ambient temperatures from -30°C to +120°C, ensuring reliability in demanding environments.

Construction hydraulic pumps achieve over 95 percent mechanical efficiency and incorporate an advanced hydrodynamic design to minimize flow losses. The main shaft is made from hardened alloy steel treated with a nitriding process to enhance wear resistance. The sealing system uses FKM O-rings resistant to mineral oils and pressures up to 400 bar. Tapered roller bearings with a 42 kN radial load capacity extend service life to over 13,000 hours. These characteristics enhance system stability, efficiency, and energy savings in construction machinery operations.

rotor pump block

The rotor pump block is made of high-strength alloy steel and can withstand operating pressures up to 350 bar and temperatures up to 120°C. The block measures 180 millimeters in length and 95 millimeters in outer diameter, allowing precise installation on the pump shaft and connection to the rotor. The internal design includes precise lubrication channels and polished surfaces to reduce friction between components. The block has been tested to withstand internal burst pressures up to 500 bar and offers mechanical fatigue resistance exceeding 15,000 operating hours. A corrosion-resistant coating and high wear resistance increase the overall service life of the rotor pump system.

The rotor pump block can be quickly mounted on industrial hydraulic pumps and heavy machinery. It weighs 2.5 kilograms, and its millimeter-precision design facilitates easy replacement and maintenance. Accurate operating pressure prevents oil leakage and rotor damage. Lubrication channels are designed to transfer oil flow up to 180 L/min without pressure loss. Stable performance under vibration and shock maximizes the efficiency and lifespan of the hydraulic system.

Komatsu dump truck injector pump

The Komatsu dump truck injector pump is made of high-strength alloy steel and can withstand operating pressures up to 2200 bar. The pump delivers diesel fuel at a flow rate of 150 L/min with milliliter-level precision to the engine injectors. Its overall length is 320 millimeters, and the body diameter is 120 millimeters, allowing direct mounting on the engine. The internal shaft is designed to withstand a torque of 450 N·m, and the internal surfaces are precisely finished to reduce friction and extend service life. The pump has been tested to endure burst pressures up to 3000 bar and maintains stable performance in ambient temperatures from -20 to 85°C.

The injector pump is compatible with fuel systems of Komatsu heavy-duty dump truck diesel engines. It weighs 18 kilograms, and its ergonomic design allows easy installation and maintenance. Pressure and fuel flow control valves are engineered to maintain injection accuracy within 0.1 milliliters. The internal lubrication system, operating at 25 bar, prevents premature wear. Stable operation under vibration and shock maximizes engine longevity and fuel system efficiency.

ZF 4WG190 and 4WG210 transmission travel pump

The 4WG190 and 4WG210 ZF transmission travel pumps are constructed from high-precision alloy steel to withstand hydraulic pressures up to 25 MPa. The displacement volume of the 4WG190 pump is 190 cc per revolution, while the 4WG210 is 210 cc per revolution. The pumps feature wear-resistant hydraulic vanes and high-load bearing precision bearings. Maximum operating speed reaches 3000 RPM with volumetric efficiency exceeding 92 percent. The pump body and hydraulic pathways are CNC-machined to minimize vibration and operational noise.

In the design of the 4WG190 and 4WG210 travel pumps, the oil flow path is optimized for minimal pressure drop and rapid transmission response. The shaft connection with the gearbox is designed to withstand torques up to 2200 Nm and instantaneous shock loads. The sealing system, including O-rings and mechanical seals, ensures oil leakage below 0.1 percent per hour. The pump weighs approximately 28 to 32 kilograms and allows direct installation on the gearbox using standard bolts and shafts. Stable operation is guaranteed within temperatures ranging from -20 to 90 degrees Celsius.

Rexroth A10VSO hyudraulic pump repair

Repairing the Rexroth A10VSO hydraulic pump starts with complete disassembly of the housing, rotor, pistons, and control plate. Each component is measured with 0.05 mm precision to detect wear or deformation. Pistons, springs, and tappets are inspected for cracks, erosion, or fatigue. Worn seals, O-rings, and washers are replaced to ensure zero leakage. Cleaning uses hydraulic-grade solvent, followed by drying in dust-free conditions. Disassembly also involves documenting part numbers for accurate replacement and verifying all tolerances against Rexroth specifications.
During assembly, the rotor is aligned within the housing, and the rear plate is adjusted to maintain 40–50 MPa nominal operating pressure. Shaft torque and preload are carefully calibrated. Flow rate and volumetric efficiency are tested at 2200–2500 rpm on a calibrated test bench. Common operational issues include low pressure, internal leakage, or excessive noise. Addressing these faults requires precise replacement of worn pistons, springs, or the rear plate and realignment of internal components to prevent premature failure.

KAWASAKI K3V pump repair

The Kawasaki K3V main hydraulic pump for Zoomlion excavators is an axial piston variable displacement type. Its flow rate ranges from 150 to 250 liters per minute, with a working pressure up to 350 bar. The pump drive power is typically 110 to 180 kW, and its volumetric efficiency is around 92 percent. Maximum operating pressure of 320 bar and hydraulic oil temperature between 40–80°C define its standard operating range. This pump powers the boom, arm, and swing systems and can withstand impact loads up to 20 percent of nominal pressure.

Repair involves disassembling the pump body, inspecting the swash plate, pistons, bearings, and internal valves. Consumable parts include pistons, O-rings, high-pressure washers, shaft bearings, and the swash plate. Internal leakage, abnormal noise above 75 dB, and flow reduction over 15 percent indicate pump failure. Standard repair costs about 25–40 percent of a new pump and includes full mechanical and hydraulic rebuilding. Inspections every 500 operating hours and replacing hydraulic oil with 46–68 mm²/s viscosity extend pump lifespan.

industrial hydraulic pump

The industrial hydraulic pump is designed to generate stable flow and precise pressure in power transmission, injection, and control systems. It is an axial piston type with a swash plate design and variable displacement control system. The displacement per revolution ranges from 25 to 160 cubic centimeters, and continuous working pressure reaches up to 320 bar. The housing is made of ductile cast iron GGG40 with a compressive strength of 350 MPa, and the internal cylinder surface is coated with 25-micron hard chrome. The operating temperature range is from -25°C to +110°C, and overall efficiency exceeds 93 percent.

Industrial hydraulic pumps feature a 42CrMo4 alloy steel drive shaft with hardened surface treatment and roller bearings supporting up to 40 kN radial load. The sealing system includes FKM O-rings resistant to hydraulic oils and pressures up to 400 bar. The optimized internal flow path minimizes pressure drops and vibration. These pumps are used in industrial machinery, hydraulic presses, and plastic injection systems with a service life exceeding 12,000 hours.

ITR travel pump

The ITR travel pump is engineered with precise hydraulic design to provide stable pressure and flow in heavy machinery drive systems. It is a fixed-axis piston pump with variable displacement, allowing precise control of oil output volume. The operating flow ranges from 60 to 140 liters per minute at 2200 rpm, with a working pressure up to 32 MPa. The pump housing is made of hardened aluminum alloy with corrosion-resistant coating. Multi-stage sealing with NBR and PTFE O-rings prevents oil leakage. Internal components maintain tolerances below 0.02 mm, ensuring high efficiency and accuracy.

The ITR travel pump features a splined input shaft and industrial-grade high-pressure bearings that enhance service life and operational stability. The pump weighs approximately 22 kilograms and supports horizontal or vertical installation in hydraulic circuits. Volumetric efficiency reaches up to 90%, reducing energy consumption. All components are manufactured according to ISO 4413 and SAE J1176 standards, ensuring consistent performance and long-term durability of the hydraulic system.

ITR two-stage hydraulic pump

The ITR two-stage hydraulic pump is engineered to provide stable pressure and flow in heavy machinery hydraulic circuits. It consists of two independent sections sharing a common shaft, allowing precise control of flow and pressure in each stage. The operating flow ranges from 80 to 160 liters per minute at 2200 rpm, with a working pressure up to 36 MPa. The housing is made of hardened aluminum alloy with corrosion and heat-resistant coating. Multi-stage sealing with NBR and PTFE O-rings reduces oil leakage and increases volumetric efficiency up to 92%.

The ITR two-stage hydraulic pump features a splined input shaft with tolerances below 0.02 mm and high-pressure resistant industrial bearings. The total weight is approximately 28 kilograms, suitable for horizontal or vertical installation in hydraulic circuits. Its precise internal design reduces vibration and noise while extending bearing and component life. All components are manufactured according to ISO 4413 and SAE J1176 standards, ensuring consistent performance and long-term durability of the hydraulic system.

Industrial, construction, and agricultural hydraulic pumps

Industrial, construction, and agricultural hydraulic pumps are designed to deliver consistent oil pressure and flow in heavy-duty hydraulic systems. The pump housing is made of compacted graphite cast iron GGG40 with compressive strength up to 350 MPa. The main shaft is alloy steel 42CrMo4 with surface hardness between 58 and 62 HRC. Displacement ranges from 25 to 160 cubic centimeters per revolution, with operating speeds between 500 and 2800 rpm. The sealing system uses NBR O-rings resistant to 120°C and pressures up to 320 bar.

Industrial and agricultural hydraulic pumps are produced in gear and piston types with volumetric efficiency above 92 percent. Output flow varies by model from 10 to 240 liters per minute. Precision needle bearings and a dynamically balanced rotor reduce vibration and extend service life beyond 10,000 hours. Inlet and outlet ports use SAE fittings ranging from ½ to 1¼ inches. This design ensures stable operation, minimizes energy losses, and enhances hydraulic system efficiency in construction machinery and agricultural equipment.

DAYTON 3 phase SS pump

This stainless steel pump is a centrifugal type that operates with a three-phase electric motor. The high flow rate output of this stainless steel pump, along with a moderate head, makes it an ideal choice for the food industry and beverage manufacturing plants. The three-phase stainless steel pump by DAYTON is designed for continuous operation and can also function as a submersible pump.

This centrifugal stainless steel pump has a power rating of 1.5 horsepower and is commonly manufactured using 316-grade stainless steel for enhanced corrosion resistance. The operating voltage of this stainless steel pump is 208-230/460 volts, drawing a current of 6.6-7.0/3.3 amps from the system.

With a maximum pumping head of 65 feet, this pump uses a TEFC Totally Enclosed Fan Cooled electric motor. The maximum flow rate output varies depending on the discharge head: it can pump 116 gallons per minute GPM at a height of 5 feet, 50 GPM at 45 feet, and 13 GPM at 60 feet.

The motor speed of this series of stainless steel pumps is 3450 RPM, operating at a frequency of 60 Hz.

ITR four-stage hydraulic pump

The ITR four-stage hydraulic pump is engineered for stable pressure and flow in heavy machinery hydraulic systems. It consists of four independent sections sharing a common shaft, allowing precise control of flow and pressure in each stage. The operating flow ranges from 100 to 220 liters per minute at 2200 rpm, with a working pressure up to 38 MPa. The housing is made of hardened aluminum alloy with corrosion and heat-resistant coating. Multi-stage sealing with NBR and PTFE O-rings reduces oil leakage and increases volumetric efficiency up to 93%.

The ITR four-stage hydraulic pump features a splined input shaft with tolerances below 0.02 mm and high-pressure resistant industrial bearings. The total weight is approximately 36 kilograms, supporting horizontal or vertical installation in hydraulic circuits. Its precise internal design reduces vibration and noise while extending bearing and component life. All components are manufactured according to ISO 4413 and SAE J1176 standards, ensuring consistent performance and long-term durability of the hydraulic system.

ITR steering pump

The ITR steering pump is engineered with advanced hydraulic design to provide consistent pressure and smooth flow in heavy machinery hydraulic steering systems. It is a fixed-axis piston pump with variable displacement, allowing precise control of oil output volume. The operating flow ranges from 50 to 120 liters per minute at 2000 rpm, with a working pressure up to 28 MPa. The housing is made of hardened aluminum alloy with corrosion and heat-resistant coating. Multi-stage sealing with NBR and PTFE O-rings prevents leakage and increases volumetric efficiency up to 88%.

The ITR steering pump features a splined input shaft with tolerances below 0.02 mm and high-pressure resistant industrial bearings. The total weight is approximately 18 kilograms, supporting horizontal and vertical installation in hydraulic circuits. Its precise internal design reduces vibration and noise during operation. All components are manufactured according to ISO 4413 and SAE J1176 standards, ensuring long-term durability and consistent performance of the hydraulic steering system.

AXFLOW food grade pump

This stainless steel pump, designed and manufactured with high capability for pumping large volumes of fluids and suitable for food-grade consumable liquids in the food industry, is branded AXFLOW and is also known as a sanitary stainless steel pump. The use of high-grade stainless steel, which has minimal chemical reaction with food-grade acids, makes this pump ideal for the food industry with a maximum flow rate capacity of 600 cubic meters per hour m³/h.

The maximum fluid head for this food-grade stainless steel pump by AXFLOW is 150 meters, and it operates at a maximum pressure of 15 bar. The use of single mechanical seals, which can be easily replaced during routine maintenance, is another positive feature of this pump.

One of the most important advantages of this AXFLOW stainless steel pump for food industry applications is its ability to create a smooth flow with minimal turbulence and low vibration during operation. The internal impellers of this centrifugal stainless steel pump are of the open type and made from 316-grade stainless steel.

Original bearings for Komatsu excavator pumps 200, 220, and 400

Original pump bearings for Komatsu 200, 220, and 400 excavators are designed with 30–50 mm inner diameter and 62–90 mm outer diameter. The balls are made of chromium steel with 60 HRC surface hardness and tensile strength of 2000 N/mm². Inner and outer rings are alloy steel with anti-corrosion coating, supporting radial loads up to 4000 kg and axial loads up to 1200 kg. Lubrication uses industrial NLGI 2 grease, with an operating temperature range from -30 to +120°C. Bearing installation precision meets ABEC P5 class, with vibration below 0.02 mm.

These bearings are compatible with hydraulic pumps of 200, 220, and 400 excavators, ensuring smooth and quiet operation. Maximum rotational speed ranges from 3000 to 6000 rpm, with service life over 50,000 hours. Impact and vibration resistance reaches 15g, with corrosion resistance in oily and humid environments. Installation uses standard bolts and shafts without structural modifications. All internal components comply with ISO 492, with successful pressure and durability testing.

ITR Two-Stage Travel Pump

The ITR two-stage travel pump features an advanced hydraulic design engineered to deliver consistent flow and pressure in heavy machinery drive systems. It consists of two independent sections sharing a common shaft, allowing precise control of displacement and output pressure. The total flow rate ranges from 80 to 160 liters per minute at 2200 rpm, with a working pressure up to 35 MPa. The housing is made of hardened aluminum alloy with industrial anodized coating for superior corrosion and heat resistance. A multi-stage sealing system using NBR and PTFE rings prevents oil leakage.

The ITR dual-stage hydraulic pump includes a splined input shaft with a manufacturing tolerance below 0.02 mm and high-pressure resistant bearings. This configuration improves volumetric efficiency up to 92% while reducing energy loss. The total weight is approximately 28 kilograms, suitable for horizontal or vertical installation in hydraulic circuits. All components comply with ISO 4413 and SAE J1176 standards, ensuring durability and consistent performance.

Volvo L150E loader hydraulic pump repair

The Volvo L150E loader hydraulic pump is a critical and complex component for optimal machine performance. It is a variable displacement piston pump with a load-sensing system that adjusts flow and pressure according to demand. The pump delivers a flow rate of approximately 47.6 gallons per minute about 180 liters per minute, and its relief valve is set to 3626 psi around 250 bar.

During repair of the L150E hydraulic pump, the system pressure must first be fully released. The pump is then removed using appropriate tools, and its internal components are inspected. Worn parts such as pistons, valves, and O-rings are replaced if necessary, and after reassembly, the pump undergoes functional testing to ensure proper operation.

Replacement parts for the L150E hydraulic pump can be sourced from reputable suppliers like FridayParts. Compatible part numbers include VOE11709023 and VOE15068638, which also fit models L150F, L180E, L180F, and L220D. Using genuine parts ensures reliability, efficiency, and longevity of the hydraulic system.

construction hydraulic pump

The construction hydraulic pump is engineered to deliver high pressure and stable flow in heavy machinery control and power transmission systems. It is an axial piston type with a swash plate design, offering a displacement capacity between 45 and 180 cubic centimeters per revolution. Operating pressure ranges from 250 to 350 bar, with a peak pressure tolerance up to 420 bar. The housing is made of cast aluminum alloy with a 25-micron hard nickel inner coating for wear resistance. The operating temperature range is from -25°C to +110°C.

Construction hydraulic pumps feature over 93 percent volumetric efficiency and optimized flow paths to minimize pressure loss. The input shaft is made of hardened 16MnCr5 steel with heat treatment for durability. Sealing is achieved with FKM O-rings resistant to mineral oils and pressures up to 400 bar. Roller bearings with a 40 kN radial load capacity extend pump life beyond 12,000 hours. These properties ensure reliable and continuous performance in excavators, loaders, and bulldozers.

New Holland B115B three-lobe pump

The New Holland B115B three-lobe pump is constructed from alloy steel with surface heat treatment and hardening to withstand hydraulic pressures up to 18 MPa. The displacement volume is 115 cc per revolution, and the maximum operating speed reaches 3200 RPM. The central shaft is machined with precision under 0.02 millimeters, and high-load radial and axial bearings are installed. Internal oil channels are CNC-designed to maintain pressure loss below 6 percent. The pump weighs approximately 9.5 to 11 kilograms, with an outer diameter of 140 millimeters.

In the design of the B115B three-lobe pump, pressure distribution within the chamber is optimized to prevent uneven wear and achieve volumetric efficiency above 90 percent. The sealing system, including O-rings and mechanical seals, ensures oil leakage below 0.1 percent per hour. The shaft connection to the gearbox can withstand torques up to 1200 Nm. The pump operates reliably within -20 to 90 degrees Celsius and has an estimated service life exceeding 8000 operating hours.

hydraulic pump

The construction hydraulic pump is designed to deliver continuous power in heavy machinery control and drive systems. It is an axial piston type with a swash-plate mechanism, offering a displacement range between 55 and 190 cubic centimeters per revolution. The nominal working pressure is 320 bar, with a peak pressure tolerance up to 420 bar. The housing is made of compact aluminum alloy with a 25-micron hard nickel coating. It operates reliably from -25°C to +115°C, suitable for heavy-duty applications.

Construction hydraulic pumps provide over 93 percent volumetric efficiency, and their optimized flow design minimizes pressure losses. The drive shaft is made of heat-treated 42CrMo4 alloy steel for maximum strength. The sealing system employs FKM O-rings resistant to 400-bar pressure and 200°C temperature. Tapered roller bearings with a 40 kN radial load capacity ensure a service life exceeding 12,000 hours. These features provide durability, stability, and high efficiency in modern construction equipment.

ITR hydraulic pump

The ITR hydraulic pump is engineered for stable pressure and flow in heavy machinery hydraulic circuits. It is a radial piston pump with variable displacement, allowing precise output flow adjustment. The operating flow ranges from 70 to 150 liters per minute at 2200 rpm, with a working pressure up to 35 MPa. The housing is made of hardened aluminum alloy with high-temperature and corrosion-resistant coating. A multi-stage sealing system using NBR and PTFE O-rings minimizes oil leakage and increases volumetric efficiency up to 91%.

The ITR hydraulic pump features a splined input shaft with tolerances below 0.02 mm and high-pressure resistant bearings. The total weight is approximately 24 kilograms, suitable for horizontal or vertical installation in hydraulic circuits. Its precise internal design reduces vibration and noise while extending bearing life. All components are manufactured according to ISO 4413 and SAE J1176 standards, ensuring durability and consistent performance of the hydraulic system.

ITR oil pump valve for the ZL50 loader

The ITR oil pump valve for the ZL50 loader is a crucial component responsible for controlling oil pressure and flow within the lubrication system. It is made from alloy steel with precise heat treatment to resist wear and temperature variations. The operating pressure range is 4.5 to 6.5 bar, withstanding temperatures up to 200°C. Its internal surface is finished with less than 0.01 mm tolerance to minimize oil leakage. The built-in spring, made of chrome-vanadium steel, maintains stable return force over extended cycles.

The ZL50 ITR oil pump valve features a compact, precision-engineered design that enhances pump performance and prevents pressure fluctuation in the oil circuit. The component weighs approximately 0.45 kilograms and allows quick installation within the pump assembly. All parts are produced under ISO 9001 standards with multi-stage quality inspection. This valve extends lubrication system life and prevents premature bearing wear.

ITR oil pump for the bulldozer

The ITR oil pump for the bulldozer is precisely engineered using durable materials to ensure stable oil pressure within the engine lubrication system. It features a dual gear design with nitrided alloy steel gears offering high wear and thermal resistance. The flow rate is approximately 65 liters per minute at 2200 rpm, with an operating pressure between 5 and 7 bar. The high-density gray cast iron housing provides dimensional stability and resistance to thermal shock. Heat-resistant O-rings up to 180°C ensure leak-free operation.

The ITR oil pump for the D9N includes a micro-tolerance drive shaft and self-lubricating bronze bushings that minimize friction. The total weight is about 12.8 kilograms, and it mounts directly to the engine block. Its consistent performance enhances bearing life and reduces engine operating temperature. Manufactured under ISO/TS 16949 standards, it ensures up to 98% precision in oil distribution.

volvo loader L90 rexroth hydraulic pump repair

Repairing the Volvo L90 A10VSO hydraulic pump begins with fully disassembling the housing and removing the rotor, pistons, and rear plate. Rotor and main shaft surfaces are measured with 0.05 mm precision to detect wear or misalignment. Pistons and springs are inspected and replaced if cracked, worn, or broken. All seals and O-rings are replaced to prevent hydraulic leaks. Components are cleaned with specialized hydraulic solvent, dried, and prepared for reassembly.
Assembly starts with precise installation of the rotor in the housing and alignment of the rear plate. Shaft torque and preload are adjusted to achieve 40–50 MPa operating pressure. Flow rate and volumetric efficiency are measured on a test bench at 2200–2500 rpm. Common issues include excessive noise, reduced output pressure, and internal leakage, which are resolved by replacing worn parts and accurate shaft alignment.

D8 caterpillar bulldozer hydraulic pump

The hydraulic pumps in Caterpillar D6, D8, D9, D10, and D11 bulldozers are predominantly variable displacement axial piston pumps. These pumps are designed to deliver high efficiency and adaptability under varying load conditions. For instance, the D8 model features a hydraulic pump output of approximately 248 L/min 65.5 gal/min at an engine speed of 2,000 rpm. The system operates under a maximum pressure setting of 32,500 kPa 4,714 psi, ensuring optimal performance and safety during operation.

Regular maintenance is crucial to ensure the longevity and efficiency of these hydraulic pumps. Caterpillar recommends using genuine Cat hydraulic fluids and filters, as well as adhering to the S•O•SSM Services for fluid analysis. Contamination control is vital therefore, using clean fluids, specialized tools, and certified repair processes is essential.

Hydraulic pump maintenance

Hydraulic pump maintenance involves inspecting and replacing internal components such as rotors, vanes, rollers, valves, and bearings to maintain system efficiency above 90% and working pressure up to 250 bar. Pump displacement ranges from 10 to 500 cc per revolution, with oil flow from 20 to 300 liters per minute. Shaft and bearing alignment must be controlled within 0.05 millimeters, and seals, including NBR or FKM, are replaced to prevent oil leakage.

Post-repair performance tests include checking pressure and flow under static and dynamic conditions. Operating temperature should remain between 0 and 90°C, and noise below 75 dB. Non-destructive testing NDT, including radiography and ultrasonic inspection, is performed on the shaft and housing. Repairs following ISO 4406 and DIN 51524 standards can extend pump service life beyond 10,000 hours.

Hydraulic pumps and steering pumps

Hydraulic pumps and steering pumps for construction machinery are made from alloy steel or hardened aluminum, designed to withstand pressures up to 350 bar and operating temperatures of 120°C. Pump flow rate varies from 10 to 150 liters per minute depending on system type and capacity, with shaft rotation speeds ranging from 500 to 4500 rpm. Internal blades or gears are hard-chrome coated and lubricated with hydraulic oil, achieving up to 95% efficiency and minimizing wear.

Pump inlet and outlet connections are designed according to SAE and ISO standards, including flanges, nuts, and precise sealing washers. Hydrostatic and dynamic pressure testing is performed, with vibration resistance up to 1500 mm/s. Internal anodizing or hard chrome coating increases service life up to 5000 hours while ensuring corrosion and industrial heat resistance.

main oil pump 102

The main oil pump 102 is constructed from wear-resistant steel alloy with a surface hardness of 55-60 HRC, ensuring resistance to hydraulic pressure up to 250 bar and operating temperatures up to 120°C. Oil flow capacity ranges from 50 to 200 liters per minute, with a recommended motor speed of 1500 to 3000 rpm. The pump impeller is a multi-channel vane type, designed to withstand axial and radial loads up to 5 kN per shaft.

Welding and assembly follow ISO 9001 standards, with precise inspection including ultrasonic testing and hydrostatic leak detection. Inlet and outlet connections use class 300 flanges with safety valves rated for 200 bar. Internal lubrication employs VG 46 industrial oil, and external anti-corrosion coating is 200-micron epoxy powder, ensuring high durability in industrial environments.