Name: DX300 Excavator Travel Gearbox Grey Excavator Construction Machinery Parts
Brand: Lanzhou Fudong Guangqi Trading Co., Ltd
SKU: DX300
Availability: InStock

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DX300 Excavator Travel Gearbox Grey Excavator Construction Machinery Parts

DX300 Excavator Travel Gearbox

Excavator Travel Gearbox Grey

Excavator Construction Machinery Parts

Place of Origin:

China

Model Number:

DX300

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Product Details

Part Name:

Travel Reduction

Productname:

Excavator Machinery Parts

Warranty:

3 Months

Application:

Excavator

Condition:

100% New

Color:

Grey

Origin:

Made In China

Highlight:

DX300 Excavator Travel Gearbox

Excavator Travel Gearbox Grey

Excavator Construction Machinery Parts

Payment & Shipping Terms

Minimum Order Quantity

1 Pc

Packaging Details

Carton

Delivery Time

7-35days

Payment Terms

T/T

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+8615294125097

guangqi334@gmail.com

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Product Description

DX300 Excavator Travel Gearbox Travel Reduction Gearbox Excavator Construction Machinery Parts

In construction machinery applications, the swing reducer of an excavator, commonly called the swing gearbox, acts as an essential transmission unit connecting the slewing motor and large slewing gear ring. It mainly provides speed reduction and torque increase to ensure steady 360° rotation of the upper assembly.

Core Component Structure

Sun Gear: Connected to the spline section of the slewing motor for high‑speed power intake.
Planet Gears: Three to four gears per stage revolve around and rotate on the sun gear to transmit torque.
Ring Gear: Permanently mounted on the housing and engages with planetary gear groups.
Planet Carrier: Delivers output power to drive the bottom small driving gear.
Brake: Built‑in wet multi‑plate braking system, locked by springs and released hydraulically to prevent backward rotation.
Housing and Bearings: High‑strength cast/forged steel housing equipped with heavy‑load bearings, featuring dust and oil leakage resistance.

Power with high rotational speed and low torque from the hydraulic motor flows through the sun gear, two‑stage planetary sets to the planet carrier. The low‑speed high‑torque pinion meshes with the slewing bearing’s inner gear ring, driving the upper body to slew.

Common Malfunctions and Underlying Causes

Abnormal sound and jerky movement: Gear abrasion and pitting corrosion, bearing failure, lack of or contaminated lubricant, unsuitable meshing backlash.
Oil permeation and leakage issues: Deteriorated oil seals, housing fissures, excessive lubricant filling, clogged air vents.
Slow or weak slewing performance: Worn gear and bearing assemblies, partial brake disengagement, internal hydraulic motor leakage, incompatible transmission ratio.
Severe heat buildup: Inadequate oil level, degraded lubrication fluid, overload working conditions, persistent brake friction, inefficient heat radiation.
Gear slipping and broken teeth: Shock loading, foreign debris entry, fatigue aging, shaft alignment errors in assembly.

Machinery Test Report	Provided	Warranty	3 Months
Video outgoing-inspection	Provided	Brand Name	OEM
Place of Origin	China	Part Name	Travel Reduction Assembly
Model	DX300	Keyword	Excavator Machinery Part
MOQ	1 Piece	Quality	Tested Great Performance
Application	Excavator	Delivery Time	7-35 Days
Service	Professsional Service	Condition	Brand New

Company Profile

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DX300 Excavator Travel Gearbox Grey Excavator Construction Machinery Parts

DX300 Excavator Travel Gearbox

Excavator Travel Gearbox Grey

Excavator Construction Machinery Parts

DX300 Excavator Travel Gearbox

Excavator Travel Gearbox Grey

Excavator Construction Machinery Parts

Doosan DH220-5 Travel Gear Box 170402-00028 Excavator Gearbox

DH300-7 DX300LC Travel Motor Gearbox 404-00098C Excavator Machinery Parts

E750 Excavator Gearbox OEM Travel Reduction Gearbox Hydraulic Excavator Spare Parts

DH55 DH60 Motor Gearbox Assembly Planetary Gear Sun Tooth Bearing Gasket

Core Component Structure

Common Malfunctions and Underlying Causes

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