CAT 349D2 352F 349F Excavator Swing Motor Swing Gearbox Swing Assembly 475-1175 475-1176 470-0474 418-7155 Device High Quality

This mining grade heavy-duty high-precision rotary motor gearbox assembly (Swing Assembly) has core original part numbers including 475-1175, 475-1176, 470-0474, and 418-7155, with perfect generation replacement and platform interchangeability between each code. This top-level rotary drive device is specially designed for Caterpillar heavy-duty hydraulic excavators, perfectly matching 50 ton core mining flagship models such as CAT 349D2, 349F, 352F (including L/LC series). The product is based on first principles for integrated optimization of ultra-high pressure fluid mechanics and heavy-duty multi-stage planetary gear system, seamlessly carrying the 360 ° high-frequency rotation and high inertia braking load of the giant vehicle body, ensuring absolute certainty of output torque. The physical dimensions of the product packaging are approximately 630mm × 630mm × 890mm, with an overall net weight of approximately 325kg. The original factory standard position is precisely aligned.

"Extreme cleaning and torque alignment: Before using heavy-duty lifting equipment for docking, the installation surface of the frame and the large gear ring of the slewing support must be absolutely flat and free of any foreign objects or rust. All high-strength fastening bolts must be tightened using torque wrenches, strictly following the factory's specified torque for symmetrical and phased cross tightening to prevent local shear stress from causing deformation of the shell.

Forced bidirectional oil injection between motor and casing (core avoidance pit): Do not connect the wrong drain pipe (Case Drain) 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.

No load micro exhaust transition: After the first ignition, control the upper body to rotate left and right at a small angle and slow speed alternately for 10-15 minutes in a no-load state, thoroughly exhaust the air inside the circuit, and closely monitor the gear meshing sound. After confirming that the thermodynamic state is stable, gradually apply the full working load."