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R250 R250LC-7 31EN-10070 Swing Motor Gearbox OEM Hydraulic Reduction Gearbox

Name: R250 R250LC-7 31EN-10070 Swing Motor Gearbox OEM Hydraulic Reduction Gearbox
Brand: Lanzhou Fudong Guangqi Trading Co., Ltd
SKU: R250
Price: Negotiable USD
Availability: InStock

Model Number:	R250
MOQ:	1 Pc
Payment Terms:	T/T

Detail Information

Product Description

Detail Information

Place of Origin:

China

Part Name:

Swing Motor Gearbox

Warranty:

3 Months

Color:

Yellow

Catagory:

Construction Machinery Parts

Model No:

R250

Condition:

100% New

Packaging Details:

Carton

Highlight:

R250 Swing Motor Gearbox

R250LC-7 Swing Motor Gearbox

OEM Hydraulic Reduction Gearbox

Product Description

R250 R250LC-7 Excavator Machinery Parts Final Drive Swing Motor Reduction Swing Gearbox

Industry‑wide known as the swing gearbox, the swing reducer for excavators is an indispensable transmission component linking the slewing motor to the large slewing gear ring. It mainly performs speed reduction and torque increase functions, making the upper machine framework rotate smoothly for a full 360 degrees.

Critical Structural Makeup Elements

Sun Gear: Connected with splines of the slewing motor unit, receiving high‑speed power input supply energy.
Planet Gears: Each stage has 3‑4 gears, orbiting around and self‑rotating on the sun gear for torque delivery transmission.
Ring Gear: Mounted fixed rigidly to the housing casing and meshes with planet gear assembly groups.
Planet Carrier: Delivers output driving power to drive the lower small driving gear wheel component.
Brake: Internally fitted wet multi‑plate brake mechanism, spring‑applied engagement locking and hydraulic‑pressure‑driven release disengagement, preventing backward reverse rotation movement.
Housing and Bearings: High‑strength cast or forged steel housing casing equipped with heavy‑duty load‑rated bearings, dust‑resistant and anti‑oil‑leakage performance.

High‑speed low‑torque power output energy from the hydraulic motor passes through the sun gear, first‑stage and second‑stage planetary gear assembly groups to the output planet carrier unit. The pinion gear rotates at low speed with high torque output force, meshing with the slewing bearing’s inner gear ring component to drive upper‑structure slewing motion function.

Regular Common Failures & Root Cause Source Factors

Strange abnormal noise / Jittery unstable running operational status: Gear abrasion wear and pitting surface damage defects, bearing failure malfunction breakdown, scarce insufficient or dirty contaminated lubricating oil fluid, unsuitable gear meshing clearance gap size parameter.
Oil permeation seepage and leakage malfunction troubles: Degraded worn oil seal gasket components, housing structural fissure crack damages, overfilled excessive lubricant liquid level height, blocked air‑vent breather outlet opening port.
Torpid slow‑moving or under‑powered weak slewing motion performance: Worn gear and bearing component parts assemblies, partial incomplete brake release state condition, internal flow bypass leakage of hydraulic motor body unit, incompatible non‑matching transmission reduction gear ratio parameter.
Severe excessive overheating temperature rise problems: Insufficient oil quantity volume or degraded lubricant quality performance characteristics, overloaded heavy‑load working scenarios conditions, continuous persistent brake drag friction resistance force, ineffective poor heat radiation dissipation efficiency performance.
Gear slipping jumping / Broken gear tooth fracture accident damages: Shock impact load pressure forces, foreign impurity particle infiltration into gearbox interior mechanism, fatigue aging degradation wear damage issues, shaft alignment offset misalignment errors during installation assembly procedures.

Machinery Test Report	Provided	Warranty	3 Months
Video outgoing-inspection	Provided	Brand Name	OEM
Place of Origin	China	Product Name	Excavator Final Drive
Product Description	Swing Reduction Gearbox	Quality	OEM Standard
Condition	Brand New	Model Number	R250 R250LC-7
MOQ	1 Piece	Delivery Time	5-7 Days
Application	Excavator	Packing	Standard Packing

R250 R250LC-7 31EN-10070 Swing Motor Gearbox OEM Hydraulic Reduction Gearbox Company Profile

Tags:

Excavator Machinery Parts

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Diesel Engine Parts

Hydraulic Main Pump

Excavator Swing Motor

Excavator Travel Motor

Swing Motor Gearbox

Excavator Hydraulic Cylinder

Swing Motor Case

Excavator Joystick Handles

Excavator Foot Pedal Valve

Travel Motor Gearbox

Excavator Turbocharger

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