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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.
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