| hydraulicmarket |
| Iran |
| 021-55130771 |
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
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| hydraulicmarket | 021-55130771 |
| hydraulicmarket |
| Iran |
| 021-55130771 |
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
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| hydraulicmarket | 021-55130771 |
| parsianrahbalandeh |
| Iran |
| 02155130771 |
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 250â
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| parsianrahbalandeh | 02155130771 |
