Nabtesco GM18VL-K-31/52 22B-60-22110 final drive for Komatsu PC130-8 PC138US-8 PC138USLC-8 excavator
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1. Product Overview
The Nabtesco GM18VL-K-31/52 is a high-capacity, integrated hydraulic transmission designed for 13-ton to 15-ton class excavators. It features a high-efficiency variable displacement axial piston motor and a multi-stage planetary reduction gearbox. Specifically engineered for the PC130-8 and the zero-tail-swing PC138US-8, this unit provides the massive tractive effort required for steep-slope climbing and heavy-duty trenching while maintaining the precise tracking control Komatsu machines are known for.
2. Comprehensive OEM Part Number Compatibility
This assembly is a 100% direct "bolt-on" replacement for the following Komatsu factory part numbers and Nabtesco specifications:
Komatsu Part Numbers:
22B-60-22110 / 22B6022110
22B-60-11350 / 22B6011350
22B-60-11300 / 22B6011300
22B-60-22111 / 22B6022111
Nabtesco Model Code:
GM18VL-K-31/52
(Configured with specific sprocket bolt patterns and hydraulic porting for the Dash-8 series).
Machine Fitment:
Komatsu PC130-8
Komatsu PC138US-8 (Ultra-Short)
Komatsu PC138USLC-8 (Long Carriage)
3. Technical Specifications & Performance
Motor Type: Variable displacement axial piston motor with integrated 2-speed travel switching.
Gearbox Architecture: High-torque planetary reduction with induction-hardened gears to resist shock-loading and fatigue.
Max Working Pressure: Rated for continuous operation up to 34.3 MPa (343 bar) to ensure original factory breakout and tracking force.
Sealing Technology: Premium Duo-Cone mechanical floating seals designed to keep gear oil in and prevent the ingress of abrasive debris, mud, and water.
Braking System: Integrated spring-applied, hydraulic-release wet disc parking brake for failsafe holding on steep grades.
4. Why Partner With a 13-Year Industry Expert?
Nabtesco OEM Authenticity: We provide the genuine GM18VL series, ensuring that internal piston sets and valve plates match the original Komatsu hydraulic curve. This prevents the tracking "drift" common with low-quality aftermarket units.
Rigorous Performance Testing: Every unit undergoes a 100% bench test. We verify volumetric efficiency, brake holding torque, and smooth 2-speed shifting under maximum pressure.
Factory-Direct Value: Access Original New or Premium OEM-spec units at competitive wholesale prices, bypassing the significant markups of local dealerships.
Global Rapid Logistics: Units are secured in reinforced, shock-proof export wooden crates. Express delivery via DHL, FedEx, or UPS typically arrives in 3 to 7 business days.
5. Critical Installation & Maintenance Protocol
Gear Oil Commissioning: Final drives are shipped without gear oil for safety. You must fill the planetary gearbox with SAE 80W-90 gear oil (approx. 3.0–3.5 liters) before operation.
Case Drain Connection: Ensure the case drain line is clear and connected to the correct port. Excessive backpressure in the motor case is the primary cause of shaft seal blowout and catastrophic motor failure.
Hydraulic System Flushing: If the previous motor failed mechanically, you must flush the hydraulic tank and lines. Residual metal shavings will destroy a new motor almost immediately.
Air Purging: After installation, lift the track and run the motor at low speed for several minutes to remove trapped air from the hydraulic circuit before applying full load.
6. Ordering & Professional Support
Fitment Verification: To ensure 100% accuracy, please provide your Machine Serial Number and the number of sprocket mounting holes.
Instant Quote: Contact us today for up-to-date pricing, availability, and tiered quality options.
Technical Guidance: Our expert team is available 24/7 to assist with installation procedures, pressure setting adjustments, and hydraulic troubleshooting.