M315 Excavator Hydraulic Pump 4328160 4328565

This high-precision hydraulic main pump assembly has core original part numbers and cross index numbers including: 243-28160/2432-8160/4328160, 432-8565/4328565, and 207-4708/2074708. As the absolute core of the fluid power source, this assembly is specially designed for Caterpillar's core wheel excavators, perfectly matching the CAT M315 and other main wheel excavator models. The product is designed based on first principles for high-pressure plunger fluid dynamics, perfectly bearing the special loads of frequent walking and compound action switching of wheeled models, ensuring absolute certainty of power output. The physical dimensions of the product packaging are approximately 610mm × 360mm × 380mm, with an overall net weight of approximately 95kg. The original factory standard position is precisely aligned.

"Extreme cleaning and pipeline alignment: Noise reduction and dust removal treatment are required for the unpacking and installation environment. All hydraulic pipeline joints and regulator feedback pipes must be thoroughly cleaned with specialized cleaning agents before being connected to a new pump, and any foreign objects are strictly prohibited from entering the pump body.

Forced oil filling (core pit avoidance): After the main pump is lifted into place and before starting the engine, clean hydraulic oil must be filled from the top of the main pump's air release/oil injection port. It is strictly prohibited to start dry grinding, otherwise the internal rotating components will undergo irreversible physical erosion within 3 seconds of ignition.

Low pressure transition and exhaust: After the first ignition, the engine must be kept idling and running at low pressure for 10-15 minutes for sufficient exhaust and thermodynamic adaptation. The working load can only be gradually applied after the oil temperature is normal and the bubbles are cleared."