Name: EC290B EC290C EC290 Swing Motor Gearbox Excavator Swing Reducer VOE14724044 VOE14724044
Brand: Lanzhou Fudong Guangqi Trading Co., Ltd
SKU: EC290
Availability: InStock

Home > Products > Swing Motor Gearbox >

EC290B EC290C EC290 Swing Motor Gearbox Excavator Swing Reducer VOE14724044 VOE14724044

EC290B Swing Motor Gearbox

EC290 Swing Motor Gearbox

Excavator Swing Reducer

Place of Origin:

China

Model Number:

EC290

Chat Now

Request A Quote

Product Details

Application:

Excavator

Catagory:

Construction Machinery Parts

Origin:

China

Productname:

Excavator Machinery Parts

Model No:

EC290

Warranty:

3 Months

Highlight:

EC290B Swing Motor Gearbox

EC290 Swing Motor Gearbox

Excavator Swing Reducer

Payment & Shipping Terms

Minimum Order Quantity

1 Pc

Packaging Details

Carton

Delivery Time

5-7 Days

Payment Terms

T/T

SY335-9 Excavator Swing Gearbox Swing Reducer For SY335 Excavators Swing Motor Gearbox

Chat Now

SY245 Excavator Swing Gearbox Excavator Machinery Parts Swing Reduction Swing Motor Gearbox

Chat Now

PC300-7 PC360-7 Komatsu Gearbox Final Drive Gear Reducer Box

Chat Now

OEM Swing Reduction Gearbox PC200-8 PC220-7 Excavator Reduction Gearbox

Chat Now

+8615294125097

guangqi334@gmail.com

Chat Now

Product Description

Excavator Parts Swing Motor Gearbox EC290B EC290C EC290 VOE14569767 Swing Reducer VOE14724044

Excavator swing gearbox (slewing reducer) functions as a vital transmission connector between the slewing motor and large slewing gear ring. By lowering speed and amplifying torque, it enables stable 360° rotary movement of the excavator upper body.
Core Structure
• Sun gear: Matches with slewing motor splines to input high-speed rotational power.
• Planet gear: 3–4 per planetary stage; orbits the sun gear and rotates independently to deliver torque.
• Ring gear: Secured to housing and maintains meshing with planetary gears.
• Planet carrier: Outputs rotary power and actuates the bottom drive pinion.
• Brake: Internal wet multi-disc brake design; spring braking and hydraulic release to prevent unintended rotation.
• Housing & Bearings: Robust cast/forged steel housing, heavy-load bearings equipped, superior dustproof and leakproof property.
Working Principle
The hydraulic motor provides high-speed low-torque power, which is transmitted stage by stage through the planetary gear train. After two-stage deceleration and torque rise, the output pinion runs at low speed and high torque, meshes with the slewing bearing inner ring gear, and drives the upper structure to swing freely.
Common Faults & Causes
• Strange noise and operation stuttering: Gear abrasion and pitting, bearing malfunction, oil shortage or impurity, incorrect gear meshing gap.
• Gear oil leakage: Seal rubber aging, housing structural crack, overfilled oil level, breather blockage.
• Slewing lag and insufficient power: Worn transmission gears or bearings, brake releasing failure, motor internal leakage, mismatched gear ratio.
• Thermal overheating: Lubricant deficiency or degradation, long-time overload work, persistent brake friction, inefficient heat dissipation.
• Gear skipping and tooth breakage: Heavy impact load, foreign debris entering gear chamber, fatigue damage, assembly offset error.

Machinery Test Report	Provided	Warranty	3 Months
Video outgoing-inspection	Provided	Brand Name	OEM
Place of Origin	China	Part Name	Swing Reduction Assembly
Model	EC290 EC290B	Keyword	Swing Gearbox
MOQ	1 Piece	Quality	Tested Great Performance
Application	Excavator	Delivery Time	7-35 Days
Service	Professsional Service	Color	Grey

EC290B EC290C EC290 Swing Motor Gearbox Excavator Swing Reducer VOE14724044 VOE14724044 0 Company Profile

Tags：

EC290B EC290C EC290 Swing Motor Gearbox Excavator Swing Reducer VOE14724044 VOE14724044

EC290B Swing Motor Gearbox

EC290 Swing Motor Gearbox

Excavator Swing Reducer

EC290B Swing Motor Gearbox

EC290 Swing Motor Gearbox

Excavator Swing Reducer

SY335-9 Excavator Swing Gearbox Swing Reducer For SY335 Excavators Swing Motor Gearbox

SY245 Excavator Swing Gearbox Excavator Machinery Parts Swing Reduction Swing Motor Gearbox

PC300-7 PC360-7 Komatsu Gearbox Final Drive Gear Reducer Box

OEM Swing Reduction Gearbox PC200-8 PC220-7 Excavator Reduction Gearbox

Excavator Swing Gear Box

Final Drive Gearbox

Planetary Gear Reduction Box

High Torque Swing Motor Gearbox EC350 Excavator Final Drives Excavator Machinery Parts

EC55 EC60 Gear Reduction Unit High Torque Excavator Swing Gearbox

EC240 Swing Motor Gearbox OEM Motor Gear Reducer Excavator Machinery Parts

PC200-8 PC220-7 Hydraulic Reduction Gearbox High Torque Swing Reduction Unit

PC200-7 Excavator Swing Gear Box Black Slewing Reducer Swing Motor Parts