4625367 Original Excavator Swing Motor for ZX240-3

The original rotary motor part number 4625367 is the core actuator of the rotary system of the Hitachi ZX240-3 medium-sized excavator (with a total weight of approximately 24 tons). This motor is mainly compatible with the ZX240-3 model and may also be compatible with platform series such as ZAX240-3 and ZX240-5. Its universal model is often labeled as Kawasaki M5X130CHB series axial piston motor. When ordering, the complete model and serial number of the equipment must be provided to ensure that its installation interface, reduction ratio, and control oil circuit are fully matched with the original system.

This product is an original rotary motor assembly that integrates an inclined shaft axial piston hydraulic motor and a multi-stage planetary gear reduction mechanism. Its designed working pressure can reach 32.4 MPa, with a rotation speed of about 13.5 rpm, providing sufficient torque to drive the upper turntable to achieve 360 ° full rotation. Internally, it includes precision friction pairs such as plungers, cylinder bodies, and distribution plates, and is equipped with normally closed hydraulic brakes, safety relief valves, oil replenishment valves, and anti reverse valves to ensure smooth rotation, reliable braking, and the ability to absorb impact when stopping. As an original component, its material, heat treatment process, and sealing components are strictly matched with Hitachi's original hydraulic system, ensuring high efficiency, low leakage, and long service life under high pressure and high load conditions.

It is recommended to check the cleanliness of the hydraulic oil (NAS level 9 or below) and the oil level of the rotary gear every 500 working hours; Monitor for any abnormal noise or stuttering during rotation. Regular maintenance: Replace the gear oil of the rotary gearbox every 1000 working hours (recommended ISO VG 220 or 320 GL-5 grade extreme pressure gear oil), and check the tightening torque of the motor mounting bolts. Lubrication management: The slewing bearing raceway should be filled with No.2 extreme pressure lithium based grease every 50-100 hours, and slow rotation is required during filling to ensure even grease filling. Fault prediction: If there is slow rotation, weakness, drifting or abnormal noise after stopping, it may be due to plunger wear, valve plate strain or brake piston seal failure, and it needs to be repaired in a timely manner.