Heavy Duty Main Hydraulic Pump 31N6-15010 K3V112DP-119R-9S09 For Hyundai R200W-7 Wheel Excavator High Efficiency Power Supply Construction Machinery Replacement Parts

This high-precision heavy-duty hydraulic main pump assembly adopts Kawasaki's classic K3V112DP-119R-9S09 inclined disc double axial piston pump architecture, with Hyundai's original core part number 31N6-15010. As the core heart of efficient fluid power supply, this assembly is specially designed for the aftermarket of Hyundai wheel hydraulic excavators, accurately matching 20 ton main star wheel excavator models such as Hyundai R200W-7. The product is based on first principles optimization of dual pump full power proportional regulation and high-frequency variable load response, seamlessly carrying the high-frequency walking transition and high-pressure excavation composite load unique to wheel working conditions, ensuring absolute certainty of power output. The physical dimensions of the product packaging are approximately 720mm × 380mm × 410mm, with an overall net weight of approximately 135kg.

"Extreme cleaning and torque tightening: Before lifting and docking, the installation surface of the flywheel housing and the transmission spline must be 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 local abnormal shear 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 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 and walking mechanism should be controlled to perform slow and full stroke reciprocating actions. After confirming that there are no bubbles and the pressure is stable, normal operating loads can be gradually applied."