Pc200-8m0 Swing Motor 706-7g-01140 706-7g-01170 706-7g-71141

This high-precision rotary motor assembly (hydraulic rotary motor) has core original part numbers including 706-7G-01140, 706-7G-01170, and 706-7G-71141. This assembly is specially designed for the Komatsu Classic -8 series excavators, perfectly matching the main 20 ton models such as PC200-8 and PC220-8. The product is optimized based on first principles for high-pressure fluid dynamics, ensuring absolute certainty in the braking and acceleration of the upper body rotation. The physical dimensions of the product packaging are approximately 480mm × 360mm × 380mm, with an overall net weight of approximately 65kg. The original factory standard position is connected, and the parameters are tightly fitted, allowing for seamless replacement.

"Extreme cleaning and alignment: Noise reduction and dust removal treatment are required for the unpacking and installation environment. Before installation, the mating surface of the Komatsu rotary reducer must be thoroughly cleaned to ensure precise meshing of the output gear. The fastening bolts must be tightened using a torque wrench in a symmetrical cross manner strictly according to the specified torque.

Forced oil injection (core avoidance pit): Do not connect the high-pressure oil pipe to the wrong drain pipe (Case Drain). Before starting the engine, it is necessary to fill the top of the rotary motor housing with clean hydraulic oil through the air release/oil injection port. Dry grinding is strictly prohibited to start, otherwise the internal rotating components will undergo physical erosion within 3 seconds of ignition.

No load micro motion transition: After the first ignition, control the excavator to rotate slowly and alternately at small angles for 10-15 minutes with no load on the upper body of the vehicle. After thoroughly exhausting the circuit air and confirming the thermodynamic stability, full load operation can be carried out."