Overview — Gear Pump 4693315
4693315 is the gear pump used on HITACHI construction machinery to supply oil flow for hydraulic and lubrication circuits, delivering a steady displacement through a compact positive-displacement design. We can supply all the original and replacement part numbers listed below, in stock or available on order — welcome to enquire by part number.
Parts Characteristics
The pump uses a pair of meshing gears inside a close-tolerance housing to move oil from inlet to outlet at a fixed displacement per revolution. The gear set is matched to the original tooth profile and hardness so the pump delivers rated flow with minimal internal leakage. The housing carries precision-machined bores for the shafts, with pressure-balanced wear plates that keep efficiency high over a long service life. Seals are sized for the operating pressure range of the circuit, and the mounting flange and shaft spline match the original drive arrangement so the pump bolts straight onto the engine or drive gearbox.
Applicable Models & Applications
This gear pump is used across HITACHI excavator and construction equipment models as the charge pump, implement pump or auxiliary oil source, depending on the machine circuit layout. The family covers the same pumping duty across adjacent models, with the reference numbers 4700708 and 9218005 identifying related builds. Typical applications include pilot-pressure supply, fan-drive circuits, and lubrication oil circulation where a constant, reliable flow is required. Confirm the displacement, rotation direction and shaft style of your original pump before ordering.
Maintenance & Replacement
Check the pump at each service for leaks at the shaft seal, the mounting face and the pressure fittings. A worn pump shows up as slow implement response, rising oil temperature, and whine from the suction side as cavitation begins. When replacing, drain the circuit, clean the inlet and outlet ports, and verify the rotation direction of the new pump matches the drive. Always replace the suction filter or strainer at the same time, because contaminated oil is the most common cause of premature gear pump failure. Prime the pump and check system pressure after installation before returning the machine to work.
Price Reference (USD)
The reference price for this Gear Pump (4693315) is approximately USD 120 – 350 per unit depending on brand grade, quantity and shipping destination. This is a planning estimate only — confirm current pricing and availability with our sales team before ordering.
Also in the GEAR PUMP Series
4700708, 9218005.
Value & Service
A failing gear pump takes the whole circuit down with it, which is why we verify 4693315 against the original HITACHI specification and confirm displacement, rotation and shaft style before dispatch. We carry the pump and the family numbers 4700708 and 9218005 so a replacement is never the bottleneck in a hydraulic repair, and we can ship worldwide with tracking by DHL, FedEx or UPS. Our team will also advise on the correct suction filtration to protect the new pump from the contamination that usually killed the old one.
Racer Machinery is a dedicated construction-machinery parts supplier — send us your part number and machine model, and we will confirm fitment, price and lead time for this gear pump and related HITACHI hydraulic components.
