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R80 Swing Motor Gearbox Metallic Gray Excavator Final Drive Excavator Parts

R80 Swing Motor Gearbox

Metallic Gray Excavator Final Drive

R80 Excavator Final Drive

Place of Origin:

China

Model Number:

R80

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Product Details

Productname:

Excavator Machinery Parts

Part Number:

R80

Warranty:

3 Months Manufacturer Warranty

Packing:

Carton Box

Color:

Metallic Gray

Condition:

100% New

Highlight:

R80 Swing Motor Gearbox

Metallic Gray Excavator Final Drive

R80 Excavator Final Drive

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

Swing Gearbox Reduction R80 Excavator Final Drive Motor Excavator Parts Swing Motor Gearbox

Commonly dubbed the swing gearbox, the swing reducer fitted on excavators is a critical transmission component connecting the slewing drive motor to the large slewing gear ring. Its primary role is speed reduction and torque enhancement, allowing the upper superstructure to perform smooth 360° rotational slewing.

Primary Structural Parts Layout

Sun Gear: Coupled with the spline section of the slewing motor, accepting high‑speed power input energy.
Planet Gears: Three to four gears for every single stage, moving circumferentially around the sun gear while self‑rotating to transmit torque power.
Ring Gear: Fastened permanently to the housing and engages with planet gear units.
Planet Carrier: Provides power output to drive the lower small driving gear wheel.
Brake: Built‑in wet multi‑disc braking unit, activated by spring force for engagement and hydraulic pressure for release, preventing backward slewing movement.
Housing and Bearings: Heavy‑duty cast or forged steel housing supported by high‑load‑capacity bearings, dust‑resistant and oil‑leakage‑proof.

High‑speed low‑torque power generated by the hydraulic motor is delivered through the sun gear, first‑stage planetary gear group and second‑stage planetary gear group to the output planet carrier. The low‑speed high‑torque pinion meshes with the inner gear ring of the slewing bearing, driving the upper equipment body to slew smoothly.

Frequent Fault Phenomena & Underlying Root Causes

Unusual sound output / Unstable running movement: Gear abrasion and surface pitting defects, bearing damage functional failure, lack of lubricating oil or oil contamination pollution, improper gear meshing backlash gap size.
Oil seepage and leakage functional malfunctions: Damaged oil seal ring components, housing structural fracture damages, excessive lubricant filling level height, blocked air‑vent breather opening outlet.
Slow‑moving or weak rotational slewing performance: Worn gears and bearing component parts, incomplete brake release operational action, internal bypass flow leakage of hydraulic motor body, non‑compatible gear transmission reduction ratio.
Overheating excess temperature rise: Inadequate oil volume quantity or degraded lubricant quality performance, overloaded working status conditions, continuous brake dragging friction resistance, poor heat dispersion radiation efficiency.
Gear skipping / Tooth fracture physical damages: Impact‑induced heavy load forces, foreign impurity particle infiltration into gearbox interior, fatigue wear aging degradation damage, shaft misalignment installation errors during assembly work.

Machinery Test Report	Provided	Warranty	1 Year
Video outgoing-inspection	Provided	Brand Name	OEM
Place of Origin	China	Product Name	Swing Reduction Gearbox
Product description	Main Final Drives Assembly	Quality	OEM Standard
Condition	brand new	Model Number	R80
MOQ	1 Piece	Delivery time	5-7 Days
Material	Cast Iron	Packing	Carton

Company Profile

Tags：

R80 Swing Motor Gearbox Metallic Gray Excavator Final Drive Excavator Parts

R80 Swing Motor Gearbox

Metallic Gray Excavator Final Drive

R80 Excavator Final Drive

R80 Swing Motor Gearbox

Metallic Gray Excavator Final Drive

R80 Excavator Final Drive

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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

Primary Structural Parts Layout

Frequent Fault Phenomena & Underlying Root Causes

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