4663300 Original ZX60-HCMC Excavator Hydraulic Pump Assembly

Part number 4663300 is the original hydraulic pump assembly for the ZX60-HCMC small hydraulic excavator produced by Hitachi Construction Machinery (China) Co., Ltd. (HCMC). This assembly is mainly suitable for the ZX60-HCMC model and may also be applicable to ZX60 excavators of the same series using the same hydraulic system. Its universal model code is often marked as AP2D25LV1RS6-892-0.

This product is a Hitachi original HPPV (Hitachi Piston Pump Variable) variable inclined disc axial piston pump assembly, which is the "heart" of the entire hydraulic system. It adopts a variable plunger and inclined disc drive design, which can adjust the output flow and pressure continuously through electro-hydraulic proportional control according to the instructions of the joystick and system load, achieving precise and efficient control of various excavator actions.

Daily inspection and maintenance: Check the pump body for any abnormal noise or leakage during each shift; Check the hydraulic oil level and quality every 250 working hours; Every 1000 working hours or annually, it is necessary to replace the hydraulic oil and all filter elements of the designated model from the original factory. Oil contamination is the main cause of internal wear and tear in the pump. Symptoms of malfunction and timing of replacement: When the entire machine is slow and powerless, the engine stalls due to stalling, the hydraulic system is abnormally hot, or the pilot operation is heavy, the hydraulic pump should be inspected with emphasis.