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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 bulldozer hydraulic pump.
WEBSITE: HEPCO bulldozer hydraulic pump repair Iran
