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DH55 Excavator Final Drives High Precision Gear Reduction Unit

Name: DH55 Excavator Final Drives High Precision Gear Reduction Unit
Brand: Lanzhou Fudong Guangqi Trading Co., Ltd
SKU: DH55
Price: Negotiable USD
Availability: InStock

Model Number:	DH55
MOQ:	1 Pc
Payment Terms:	T/T

Detail Information

Product Description

Detail Information

Place of Origin:

China

Part Name:

Gear Reduction Unit

Orign:

China

Application:

Excavator

Condition:

100% New

Color:

Sliver

Packing:

Carton Box

Packaging Details:

Carton

Highlight:

DH55 Excavator Final Drives

Excavator Final Drives High Precision

High Precision Gear Reduction Unit

Product Description

DH55 Excavator Final Drives Swing Gearbox High Precision Reduction Gear Reducer Construction Machinery Parts

The excavator swing reducer, generally referred to as the swing gearbox, is an essential transmission assembly that links the swing motor with the large slewing gear ring. It is mainly designed for speed reduction and torque boost, enabling the upper carriage to achieve smooth 360-degree rotation.

• Sun gear: Engaged with the slewing motor via splines to receive high-speed power input.
• Planet gear: Each stage contains 3 to 4 gears; they revolve around the sun gear while spinning independently to transfer torque.
• Ring gear: Mounted firmly inside the housing and meshes with the planet gears.
• Planet carrier: Acts as the power output unit to drive the bottom pinion gear.
• Brake: Adopts an integrated wet multi-disc brake design; spring-engaged and hydraulically released, it prevents unintended free rotation of the slewing mechanism.
• Housing and bearings: Constructed from high-strength cast or forged steel, fitted with heavy-load bearings, delivering reliable dustproof and oil-sealing performance.

The hydraulic motor produces high rotational speed with low torque and transmits power to the sun gear. Power is sequentially delivered through the first-stage planetary gear set and planet carrier to the secondary sun gear and second-stage planetary assembly. After two-stage planetary deceleration, power is output from the secondary planet carrier. The pinion runs at low speed and high torque, meshes with the inner gear ring of the slewing bearing, and ultimately drives the upper structure to perform smooth slewing motion.

Common Faults and Causes
Abnormal noise / Stuttering: Gear wear / pitting corrosion, bearing damage, insufficient oil / dirty oil, abnormal meshing clearance.
Oil leakage: Oil seal aging, housing cracks, excessive oil level, breather valve blockage.
Weak slewing / Slow slewing: Gear / bearing wear, brake failure to release, motor internal leakage, mismatched speed ratio.
Overheating: Insufficient oil / oil deterioration, overload, brake dragging, poor heat dissipation.
Gear jumping / Broken gear teeth: Impact load, foreign matter entry, fatigue wear, installation misalignment.

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 StandardOEM Standard
Condition	Brand new	Model Number	DH55
MOQ	1 Piece	Delivery Time	5-7 Days
Application	Excavator	Packing	Standar Packing

Tags:

Excavator Machinery Parts

Hydraulic Main Control Valve

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

products details

DH55 Excavator Final Drives High Precision Gear Reduction Unit

DH55 Excavator Final Drives High Precision Gear Reduction Unit

DH55 Excavator Final Drives

Excavator Final Drives High Precision

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