20T-60-87120 final drive for Komatsu PC35R-8 PC40R-8 mini excavator
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- Product: Original Final Drive Travel Motor With Planetary Reducer
- OEM Numbers: 20T‑60‑87120, 20S‑60‑82131, 20S‑60‑82130
- Compatible Models: Komatsu PC35R‑8, PC40R‑8 Mini Excavator
- Application: Mini Excavator Rubber‑Track Undercarriage Spare Parts
- Condition: Original New
- Note: Complete integrated assembly, supplied by Belparts, suitable for rubber track undercarriage variant
2.Core Advantages
- OEM calibrated integrated travel unit, delivers sufficient tractive power for rubber‑track mini excavator working on soft ground
- Reinforced floating face seal assembly effectively blocks mud, sand and moisture ingress on wet construction sites
- Built‑in counterbalance valve stabilizes downhill travel performance and prevents unexpected track slipping
- Matches original track frame mounting dimensions, enables direct replacement without on‑site machining modification
3.Technical Data
- Assembly Type: Integrated final drive, axial piston travel motor + multi‑stage planetary reduction gearbox
- Function: Deliver crawler driving torque, pivot steering and reliable slope‑holding performance
- Internal Components: Piston motor assembly, planetary gear set, carrier unit, spring‑applied wet multi‑disc parking brake, built‑in counterbalance valve
- Hydraulic Working Fluid: Anti‑wear hydraulic oil ISO VG46
- Gearbox Lubricant: Industrial gear oil ISO VG150
- Rated Working Pressure: 24.5 MPa
- Max Instant Peak Pressure: 27.5 MPa
- Max Output Torque: OEM‑standard torque for 3.5‑4 ton rubber‑track mini excavator
- Reduction Ratio: 53.2:1
- Brake Mode: Spring‑engaged, hydraulic‑released parking brake
- Mounting Interface: Original bolt circle, spigot dimension and hydraulic port layout
- Sprocket Compatibility: Matches OEM sprocket for rubber track drive system
- Bench Validation: Travel torque test, brake holding capacity inspection, pressure retention test, internal leakage and noise measurement
- Weight: 36kg approx
4.FAQ
Q1: Can this final drive fit both PC35R‑8 and PC40R‑8 rubber track machines?
A1: Fits listed models, cross‑verify your old part number before placing order.
Q2: What risk will occur if the floating seal gets damaged?
A2: Gear oil leakage, abrasive contaminants enter gearbox and accelerate premature wear of planetary components.
Q3: What checks should be completed after installation?
A3: Fill gear oil to correct level, inspect rubber track tension, avoid sharp pivot turn during initial running‑in period.