2443304 PUMP FOR CAT Off-highway Truck 773D

This mining grade heavy-duty high-precision hydraulic pump assembly has a core original part number of 244-3304 (2443304). As the core heart of fluid power transmission and system control, this assembly is specially designed for Caterpillar's large off highway rigid dump trucks, and is widely matched with core main mining truck models such as CAT 773D, 773E, and 775E. The product is designed based on first principles for ultra-high pressure fluid dynamics optimization, perfectly bearing the extreme loads of high-frequency frequent lifting, steering or braking circuits under harsh mining conditions, ensuring absolute certainty of power output. The physical dimensions of the product packaging are approximately 510mm × 350mm × 360mm, with an overall net weight of approximately 55kg. The original factory standard hole positions are precisely aligned.

"Extreme cleaning and torque tightening: Before lifting and docking, the environment and installation surface need to be cleaned with dust removal. All high-pressure oil pipes and feedback signal pipes must be thoroughly cleaned before connecting to a new pump. Tighten bolts using torque wrenches strictly in accordance with the original factory standard torque for symmetrical and phased cross tightening, to prevent local stress concentration from causing deformation of bearings or shells.

Forced oil filling (core pit avoidance): After the main pump is lifted in place and the pipeline connection is completed, clean hydraulic oil must be filled from the top of the pump body's oil injection/exhaust port before starting the truck engine. 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 automatic exhaust and thermodynamic adaptation of the system. Normal operating loads can only be gradually applied after the oil temperature and pressure stabilize and all bubbles are cleared."