Variable Displacement Pump 95177940 A7FO107, Interchangeable With 89652440, Fits Komatsu PC4000-6 Excavator

This mine-grade ultra-heavy-duty high-precision variable displacement piston pump assembly features the core architecture of Rexroth's classic A7FO107 series bent-axis fixed/variable high-pressure piston pump, with the original manufacturer's core part number 95177940 and perfect compatibility with interchangeable part number 89652440. As the absolute hydraulic heart of super mine power systems or high-flow pilot/auxiliary circuits, this assembly is exclusively customized for Komatsu's ultra-large giant hydraulic excavators, seamlessly matching industry giants like the 400-ton PC4000-6 series. Optimized based on first principles for enhanced bent-axis high-transient load capacity, it effectively withstands extreme alternating impacts under severe mine stripping operations. The product packaging measures approximately 530mm × 320mm × 340mm, with an overall net weight of about 58kg. The original manufacturer's standard mounting holes ensure precise alignment.

"Extreme cleaning and torque tightening: Before lifting and docking, the installation flange and transmission spline 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 phased cross tightening, to prevent slight deformation of the cast iron shell caused by uneven local stress.

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. 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 circuit exhaust. After the oil temperature and pressure stabilize and all bubbles are completely expelled, normal working load can be gradually applied."