Excavator Pump Parts Rexroth A8VO107 Cylinder Block Rotor R902042022 Excavator Replacement Parts

Excavator Pump Parts Rexroth A8vo107 Cylinder Block Rotor R902042022 Excavator Replacement Parts

Accommodate pistons Multiple cylinder bores are evenly distributed on the cylinder block. Pistons are installed inside the bores and slide reciprocally within them to change the sealed volume, achieving oil suction and oil discharge.

Transmit torque and perform rotational work The drive shaft drives the cylinder block to rotate at high speed. The cylinder block turns together with all pistons, converting engine power into pressure energy of hydraulic oil.

Cooperate with the valve plate to complete oil distribution The end face of the cylinder block fits closely against the valve plate. As the cylinder block rotates, the cylinder bores align sequentially with the suction port and pressure port of the valve plate:

Aligned with the suction zone: Volume increases → hydraulic oil is sucked in

Aligned with the pressure zone: Volume decreases → high‑pressure oil is delivered

Form high‑pressure sealing chambers High‑pressure sealing clearances are formed between cylinder bores and pistons to maintain system pressure. Wear or scoring of the clearances will cause internal leakage, resulting in reduced pump pressure and weak operation.

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