20U-60-42111 TZ419D200000-F Final Drive for Komatsu PC45MR-1 PC45MRX-1 PC58UU-3 | GM06VA Travel Motor

Precision GM06VA Fitment & 220mm Sprocket Spigot for 4.5–5.8T Komatsu Earthmovers. OEM-spec replacement Nabtesco GM06VA / GM06VL dual-displacement axial piston hydraulic travel motor complete with integrated planetary reduction gearbox, engineered specifically for Komatsu PC45MR-1, PC45MRX-1, and PC58UU-3 mini excavators.

1. Technical Operating Specifications

(Authority verified via Komatsu EPC parts catalogs & Nabtesco GM06 engineering databases)

2. Complete Undercarriage Blueprint & Mounting Dimensions

(Direct engineering measurements from GM06VA blueprint for Komatsu 5-ton track frames)

3. Resolving Komatsu PC45MR-1 Offset Splay & GM06 Shifting Stiction

Experiencing single-track lag during road tramming, or finding loose M14 sprocket bolts after heavy trenching? Komatsu PC45MR-1 and offset-boom PC58UU-3 excavators transmit intense cyclic side-loads through the 220 mm sprocket pilot hub (Dimension B). When mounting hardware experiences slight radial play, the GM06 reduction gears mesh at misaligned angles, accelerating tooth wear. Over high operating hours, thermal expansion causes the internal dual-speed displacement piston to stick, trapping the motor in single-speed mode and bleeding high-pressure fluid past the valve plate. Installing our precision-metered 20U-60-42111 final drive ensures 100% concentric 220 mm sprocket alignment, eliminates gear backlash, and restores responsive two-speed tracking.

4. Frequently Asked Questions (Technical & Commercial)

For Machine Owners & Operators (C-End Insights)

Q: Will this GM06VA final drive bolt directly onto my Komatsu PC58UU-3 without chassis modification? A: Yes. It matches OEM part number 20U-60-42111 and stamping TZ419D200000-F directly. The 220 mm sprocket hub pilot (B), 246 mm sprocket PCD (A), 288 mm frame PCD (D), and 9-hole frame / 12-hole sprocket M14 patterns align seamlessly with your factory Komatsu undercarriage.

Q: What is the mandatory startup lubrication procedure before running this drive? A: Pre-fill the hydraulic motor casing with fresh ISO VG 46 fluid through the PF 1/4 casing drain port (R). Separately, fill the planetary 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 20U-60-42111 cross-reference with TZ419D200000-F in our inventory? A: 20U-60-42111 is the Komatsu OEM part number, while TZ419D200000-F is the manufacturer stamping code for the Nabtesco GM06VA platform. Both represent the identical 9-hole frame / 12-hole sprocket configuration across PC45MR-1, PC45MRX-1, and PC58UU-3 machines, enabling single-SKU inventory coverage.

Q: What is the overseas export crating 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.Spare parts list