Sany SY485 SY500 SY550 SY980 Excavator Swing Motor Swing Gearbox 60201949 M5X250 M5X250CHB-10A-46A Device High Quality

This mining grade heavy-duty high-precision rotary motor gearbox assembly, with Sany original core part number 60201949, uses Kawasaki Star M5X250 (specific model: M5X250CHB-10A-46A) series high-pressure high torque inclined disc piston rotary motor as the core. This assembly is specially designed for SANY heavy-duty hydraulic excavators, with strong platform interchangeability, perfectly matching core mining and super heavy flagship models such as SY485, SY500, SY550, and SY980 with a capacity of 50 to 100 tons. The product is based on first principles optimization of ultra-high pressure fluid mechanics and heavy-duty planetary gear system, seamlessly carrying the large inertia starting and braking loads of the giant vehicle body, ensuring absolute certainty of propulsion torque. The physical dimensions of the product packaging are approximately 640mm × 640mm × 920mm, with an overall net weight of approximately 345kg. The original factory standard position is precisely aligned.

"Extreme cleaning and torque tightening: Before using heavy-duty lifting equipment for docking, the environment needs to be treated with dust removal. The installation surface of the frame and the large gear ring of the slewing support must be absolutely flat and free of any rust. All high-strength bolts must be tightened using torque wrenches, strictly following the original factory standards for symmetrical and phased cross tightening, to prevent local stress concentration.

Forced bidirectional oil injection between motor and casing (core avoidance pit): Do not connect the drain pipe (Case Drain) incorrectly when connecting hydraulic pipelines. 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; At the same time, attention must be paid to loading the gear oil inside the gearbox to the oil dipstick standard line. It is strictly prohibited to start dry grinding, otherwise the rotating components will undergo irreversible physical erosion within 3 seconds of ignition.

Low pressure transition and full exhaust: After the first ignition, control the upper body to rotate at a small angle and slow speed alternately for 15-20 minutes in an unloaded state for fully automatic exhaust of the system. After the oil temperature stabilizes and all bubbles are completely expelled, the normal operating load can be gradually applied."