CAT 988G Hydraulic Main Pump 153-9624

This heavy-duty high-precision hydraulic main pump assembly, Caterpillar original core part number 153-9624 (1539624), is perfectly compatible with Caterpillar genuine remanufacturing interchange code 0R-1062. This high-pressure plunger pump assembly serves as the absolute control heart for the fluid power supply of the entire machine, specially designed for deep matching of Caterpillar's large heavy-duty wheeled equipment. It is precisely suitable for CAT 988G, 988H Wheel Loader, 834G, 834H Wheel Dozer, 836G, 836H garbage compactor and other 50 ton and above industry core heavy-duty star models. The product is based on first principles optimization of the inclined plate plunger architecture, seamlessly resisting the extreme alternating loads under high-frequency heavy-duty shovel loading and mining bulldozing conditions. The physical dimensions of the product packaging are approximately 760mm × 410mm × 430mm, with an overall net weight of approximately 145kg.

"Extreme cleaning and torque tightening: Before using heavy-duty lifting equipment for docking, the installation surface of the engine flywheel housing and the transmission spline shaft must be kept absolutely clean. All high-strength fastening bolts must be tightened using torque wrenches, strictly following the original factory torque standards for symmetrical and multi-stage cross tightening, to prevent local abnormal shear stress from causing slight stress deformation of the shell.

Forced oil injection (core pit avoidance): After the main pump is lifted into place and the pipeline connection is completed, clean hydraulic oil must be filled from the top oil injection/exhaust port of the main pump and manually turned before starting the engine for the first time. 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 full exhaust: After the first ignition, the engine must be kept idling and running at low pressure for 10-15 minutes for automatic exhaust of the entire system. The working device should be controlled to perform slow and full stroke reciprocating actions. After confirming that there are no bubbles and the pressure is stable, the rated operating load can be gradually applied."