bulldozer

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,

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

Komatsu Bulldozer D475A-5

The Komatsu D475A-5 bulldozer is equipped with an SAA6D170E-5 diesel engine producing 500 horsepower at 1900 RPM. The engine displacement is 27.0 liters, delivering a maximum torque of 2800 N·m at 1400 RPM. The hydraulic system features a 600 L/min pump with 300 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 8500 N·m. The front blade measures 5.5 meters wide and 1500 mm high, capable of moving extremely large volumes of soil, sand, and rock. The hydro-mechanical transmission with 8 forward and 3 reverse gears allows precise speed control up to 12 km/h.

The operating weight of the bulldozer is 72 tons, and its overall length is 11.2 meters, ensuring stability and maneuverability on rough terrain and challenging conditions. Front and rear axles feature independent differential locks with a load capacity of 25 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and rocky terrain. Fuel consumption is approximately 65 liters per hour, and the fuel tank capacity is 1000 liters, ensuring high operational efficiency.

Komatsu Bulldozer D155A-6-12

The Komatsu D155A-6-12 bulldozer is equipped with an SAA6D140E-6 diesel engine producing 310 horsepower at 1900 RPM. The engine displacement is 14.0 liters, delivering a maximum torque of 1650 N·m at 1400 RPM. The hydraulic system features a 360 L/min pump with 240 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 4700 N·m. The front blade measures 4.3 meters wide and 1200 mm high, capable of moving large volumes of soil, sand, and rock. The hydro-mechanical transmission with 7 forward and 3 reverse gears allows precise speed control up to 12 km/h.

The operating weight of the bulldozer is 28.5 tons, and its overall length is 8 meters, ensuring stability and maneuverability on rough terrain and challenging conditions. Front and rear axles feature independent differential locks with a load capacity of 12 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and rocky terrain. Fuel consumption is approximately 34 liters per hour, and the fuel tank capacity is 420 liters, ensuring high operational efficiency.

Komatsu Bulldozer D275A-5

The Komatsu D275A-5 bulldozer is equipped with an SAA6D170E-5 diesel engine producing 354 horsepower at 1900 RPM. The engine displacement is 22.1 liters, delivering a maximum torque of 2150 N·m at 1400 RPM. The hydraulic system features a 480 L/min pump with 280 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 6500 N·m. The front blade measures 4.8 meters wide and 1350 mm high, capable of moving large volumes of soil, sand, and rock. The hydro-mechanical transmission with 7 forward and 3 reverse gears allows precise speed control up to 12 km/h.

The operating weight of the bulldozer is 49.5 tons, and its overall length is 10.2 meters, ensuring stability and maneuverability on rough terrain and challenging conditions. Front and rear axles feature independent differential locks with a load capacity of 18 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and rocky terrain. Fuel consumption is approximately 48 liters per hour, and the fuel tank capacity is 700 liters, ensuring high operational efficiency.

Komatsu Bulldozer D155A-2

The Komatsu D155A-2 bulldozer is equipped with an SAA6D140E-1 diesel engine producing 300 horsepower at 1800 RPM. The engine displacement is 14.0 liters, delivering a maximum torque of 1600 N·m at 1400 RPM. The hydraulic system features a 350 L/min pump with 240 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 4500 N·m. The front blade measures 4.2 meters wide and 1200 mm high, capable of moving large volumes of soil, sand, and rock. The hydro-mechanical transmission with 6 forward and 3 reverse gears allows precise speed control up to 12 km/h.

The operating weight of the bulldozer is 27.5 tons, and its overall length is 7.8 meters, ensuring stability and maneuverability on rough terrain and challenging conditions. Front and rear axles feature independent differential locks with a load capacity of 12 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and rocky terrain. Fuel consumption is approximately 32 liters per hour, and the fuel tank capacity is 400 liters, ensuring high operational efficiency.

Komatsu Bulldozer D375A-5

The Komatsu D375A-5 bulldozer is equipped with an SAA6D170E-5 diesel engine producing 410 horsepower at 1900 RPM. The engine displacement is 22.1 liters, delivering a maximum torque of 2450 N·m at 1400 RPM. The hydraulic system features a 520 L/min pump with 280 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 7500 N·m. The front blade measures 5.1 meters wide and 1400 mm high, capable of moving large volumes of soil, sand, and rock. The hydro-mechanical transmission with 7 forward and 3 reverse gears allows precise speed control up to 12 km/h.

The operating weight of the bulldozer is 57 tons, and its overall length is 10.8 meters, ensuring stability and maneuverability on rough terrain and challenging conditions. Front and rear axles feature independent differential locks with a load capacity of 20 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and rocky terrain. Fuel consumption is approximately 52 liters per hour, and the fuel tank capacity is 750 liters, ensuring high operational efficiency.

Caterpillar Bulldozer D9N

The Caterpillar D9N bulldozer is equipped with a CAT C18 ACERT diesel engine producing 405 horsepower at 2000 RPM. The engine displacement is 18.1 liters, delivering a maximum torque of 2500 N·m at 1400 RPM. The hydraulic system features a 550 L/min pump with 280 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 7200 N·m. The front blade measures 5 meters wide and 1400 mm high, capable of moving large volumes of soil, sand, and rock. The hydro-mechanical transmission with 7 forward and 3 reverse gears allows precise speed control up to 13 km/h.

The operating weight of the bulldozer is 58 tons, and its overall length is 10.5 meters, ensuring stability and maneuverability on rough terrain and challenging conditions. Front and rear axles feature independent differential locks with a load capacity of 22 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and rocky terrain. Fuel consumption is approximately 55 liters per hour, and the fuel tank capacity is 800 liters, ensuring high operational efficiency.

Caterpillar Bulldozer D8R

The Caterpillar D8R bulldozer is equipped with a CAT C15 ACERT diesel engine producing 354 horsepower at 2000 RPM. The engine displacement is 15.2 liters, delivering a maximum torque of 2100 N·m at 1400 RPM. The hydraulic system features a 500 L/min pump with 260 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 6200 N·m. The front blade measures 4.6 meters wide and 1300 mm high, capable of moving large volumes of soil, sand, and rock. The hydro-mechanical transmission with 7 forward and 3 reverse gears allows precise speed control up to 13 km/h.

The operating weight of the bulldozer is 51 tons, and its overall length is 10 meters, ensuring stability and maneuverability on rough terrain and challenging conditions. Front and rear axles feature independent differential locks with a load capacity of 20 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and rocky terrain. Fuel consumption is approximately 50 liters per hour, and the fuel tank capacity is 750 liters, ensuring high operational efficiency.

Caterpillar Bulldozer D6N

The Caterpillar D6N bulldozer is equipped with a C9.3 ACERT diesel engine producing 200 horsepower at 2100 RPM. The engine displacement is 9.3 liters, delivering a maximum torque of 950 N·m at 1400 RPM. The hydraulic system features a 250 L/min pump with 220 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 3000 N·m. The front blade measures 3.7 meters wide and 950 mm high, capable of moving large volumes of soil, sand, and rock. The hydro-mechanical transmission with 6 forward and 3 reverse gears allows precise speed control up to 12 km/h.

The operating weight of the bulldozer is 18 tons, and its overall length is 5.7 meters, ensuring stability and maneuverability on rough terrain and challenging conditions. Front and rear axles feature independent differential locks with a load capacity of 8 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and rocky terrain. Fuel consumption is approximately 25 liters per hour, and the fuel tank capacity is 280 liters, ensuring high operational efficiency.

Komatsu Bulldozer D65E-12

The Komatsu D65E-12 bulldozer is equipped with an SAA6D125E-5 diesel engine producing 165 horsepower at 2100 RPM. The engine displacement is 7.15 liters, delivering a maximum torque of 750 N·m at 1400 RPM. The hydraulic system features a 200 L/min pump with 200 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 2800 N·m. The front blade measures 3.3 meters wide and 900 mm high, capable of moving large volumes of soil and sand. The hydro-mechanical transmission with 6 forward and 3 reverse gears allows precise speed control up to 10 km/h.

The operating weight of the bulldozer is 16.5 tons, and its overall length is 5.8 meters, ensuring stability and maneuverability under tough conditions. Front and rear axles feature independent differential locks with a load capacity of 7.2 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and uneven terrain. Fuel consumption is approximately 18 liters per hour, and the fuel tank capacity is 180 liters, ensuring high operational efficiency.

Komatsu Bulldozer D85

The Komatsu D85 bulldozer is equipped with an SAA6D125E-5 diesel engine producing 205 horsepower at 2000 RPM. The engine displacement is 7.15 liters, delivering a maximum torque of 820 N·m at 1400 RPM. The hydraulic system features a 220 L/min pump with 210 bar working pressure, controlling the blade, frame, and front attachments. The frame is made of high-strength steel with a bending resistance of 3200 N·m. The front blade measures 3.5 meters wide and 950 mm high, capable of moving large volumes of soil, sand, and crushed rock. The hydro-mechanical transmission with 6 forward and 3 reverse gears allows precise speed control up to 12 km/h.

The operating weight of the bulldozer is 18.7 tons, and its overall length is 6 meters, ensuring stability and maneuverability on rough terrain. Front and rear axles feature independent differential locks with a load capacity of 8 tons. The cabin includes an ergonomic vibration-absorbing seat and air conditioning for enhanced operator comfort. The dual-circuit hydraulic braking system and adjustable hydraulic steering provide precise control on slopes and hard terrain. Fuel consumption is approximately 20 liters per hour, and the fuel tank capacity is 200 liters, ensuring high operational efficiency.

Excavator and Bulldozer Tooth

Excavator and bulldozer teeth are made of wear-resistant alloy steel with a surface hardness of 50-55 HRC, ensuring long service life under heavy-duty conditions. The weight of the tooth varies between 15 and 35 kg depending on the model, with a length of 400 to 600 mm. The ground contact surface is wear-resistant with a 5 mm heat-treated layer, increasing shear and compressive strength. The conical and blade-like design allows easy penetration into soil, sand, and rock, and the 30-degree mounting angle optimizes shear forces. Attachment to the bucket uses standard bolts and pins, ensuring safety and quick replacement in heavy-duty work sites.

The tooth structure includes stress-relief grooves and lateral reinforcements, providing bending resistance up to 2500 N·m. Corrosion-resistant coating and UV-resistant paint extend the part’s service life. Mounting hole spacing is 120 mm with 25 mm bolt diameter for all standard models. The ergonomic blade design and curved tip reduce fuel consumption and improve excavation efficiency. These features ensure optimal performance, reduced bucket wear, and increased overall durability of heavy equipment.

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.