Komatsu PC35MR-1 PC35MRX-1A PC38UU-3 Final Drive 22F-60-11210 Excavator Travel Motor Device

20T-60-78120 22F-60-11210 Final Drive for Komatsu PC40-7 PC35MR-1 PC38UU-3 | TM04 Travel Motor
Heavy 4200 N·m Torque & 210mm Sprocket Fitment for 3.5–4.5T Komatsu Earthmovers. Direct OEM replacement TM04 dual-displacement hydraulic travel motor complete with 52.7:1 planetary reduction gearbox, engineered specifically for 9-hole 210mm register Komatsu PC40-7, PC40R-7, PC35MR-1, and PC38UU-3 mini excavators.

1. Technical Operating Specifications
(Authority verified via Komatsu EPC parts cross-reference & compact hydraulic databases)

2. Verified Undercarriage Fitment Dimensions
(Precision measurements for Komatsu 4-ton class track frames)

3. Resolving Komatsu PC40/PC38UU Track Binding & Bearing End-Play
Hearing harsh metallic crunching from your final drive hub when pivoting, or experiencing weak track push on slopes? On 4-ton Komatsu PC40 and offset-boom PC38UU excavators, tight urban maneuvering generates severe lateral bending loads across the 210 mm sprocket flange. High operating hours loosen pre-load on internal tapered roller bearings, allowing the 52.7:1 planetary gear set to mesh at misaligned angles. Concurrently, hydraulic bypass across worn cylinder barrel faces drops low-gear breakout torque well below the factory 4200 N·m rating. Installing our precision-machined 20T-60-78120 final drive restores factory bearing pre-load, stops fluid bypass, and reinstates crisp, synchronized dual-speed tracking.

4. Frequently Asked Questions (Technical & Commercial)

For Machine Owners & Operators (C-End Insights)
Q: Will this final drive bolt directly onto my Komatsu PC38UU-3 without chassis modification? A: Yes. It matches factory OEM part numbers 22F-60-11210 / 20T-60-78120 directly. The 165 mm chassis register, 210 mm sprocket pilot ID, and dual 9-hole φ12 mm patterns align seamlessly with your factory Komatsu undercarriage.
Q: What is the critical startup lubrication protocol for this unit? A: Pre-fill the hydraulic motor casing with fresh ISO VG 46 fluid through the upper casing drain plug. Separately, fill the planetary reduction gearbox with SAE 80W-90 extreme-pressure gear lubricant up to the horizontal oil level check plug before starting the engine.

For Equipment Dealers & Repair Facilities (B-End Insights)
Q: How does 22F-60-11210 cross-reference with 20T-60-78120 and 20T-60-43100? A: 20T-60-78120, 20T-60-43100, and 22F-60-11210 are factory-interchangeable assembly part numbers across the Komatsu PC40-7 and PC35/PC38 platform, sharing identical 52.7:1 reduction gearing, 40 L/min flow rating, and 210 mm sprocket interfaces.
Q: What is the packaging and export freight preservation standard? A: Each drive unit is internally treated with rust-inhibiting transit fluid, sealed inside heavy-gauge vapor corrosion inhibitor (VCI) poly barrier wrap, and bolted securely inside an ISPM-15 certified fumigated export wooden crate built for container and air cargo handling.
5.Parts list