KOMATSU PC40-6 PC38UU-1 Final Drive Travel Motor With Gearbox Device 20T-60-43100 20T-60-42100 Excavator Spare Parts

• Product: Final Drive Travel Motor With Gearbox Assembly
• OEM Numbers: 20T‑60‑43100, 20T‑60‑42100
• Compatible Models: KOMATSU PC40‑6, PC38UU‑1 Mini Excavator
• Application: Excavator Crawler Travel System Spare Parts
• Condition: Original New
• Note: Complete integrated unit including hydraulic travel motor and planetary reduction gearbox

• OEM matched internal components guarantees stable tractive force for tight‑tail swing mini excavator
• Reinforced floating seal assembly resists mud, water and dirt ingress on muddy construction sites
• Built‑in counterbalance valve prevents track slipping when travelling downhill
• Perfect fit for original track frame, no modification required during replacement

• Assembly Type: Integrated final drive, axial piston travel motor plus multi‑stage planetary reduction gearbox
• Function: Deliver crawler driving torque, pivot steering and slope holding capacity
• Internal Components: Piston motor assembly, planetary gear sets, carrier, spring‑applied wet multi‑disc parking brake, built‑in counterbalance valve
• Hydraulic Fluid: Anti‑wear hydraulic oil ISO VG46
• Gearbox Lubricant: Industrial gear oil ISO VG150
• Rated Working Pressure: 24.0 MPa
• Max Instant Peak Pressure: 27.0 MPa
• Max Output Torque: Matches OEM specification for 3.5‑4 ton mini excavator
• Brake Mode: Spring‑engaged, hydraulic‑released parking brake
• Mounting Interface: Original bolt circle, spigot dimension and hydraulic port layout
• Sprocket Fitting: Compatible with OEM sprocket for crawler drive
• Bench Validation: Travel performance test, brake holding torque test, pressure retention, internal leakage and noise inspection
• Weight: 46kg approx

Q1: Does this final drive support two‑speed travel function?

A1: It follows original machine configuration, confirm your machine specification before installation.

Q2: What should be checked before installing this travel assembly?

A2: Clean all hydraulic ports, inspect track frame sealing face and check sprocket wear level.

Q3: What leads to travel motor overheating?

A3: Insufficient gear oil, failed floating seal, dragging parking brake or faulty counterbalance valve.