A: A distinct metallic rattling noise from the pump casing, persistent foaming inside the hydraulic tank, and jerky cylinder movements confirm cavitation damage.
A: Filling the pump case with clean oil provides immediate lubrication to the pistons, shoes, and swashplate during startup, preventing metal galling and failure.
A: Check that the pump tag matches part number 4635645 or 4615367. This assembly is calibrated for Hitachi ZX200-3 and ZX240-3 variable hydraulic systems.
A: Equipped with premium hardened steel pistons, the pump sustains high working pressures without pressure fade, ensuring steady breakout power.
Q: What quality options are available?
A: We provide original, OEM, and high-quality aftermarket versions with stable supply capability.






















