Komatsu 20Y-27-00301 final drive for Komatsu PC200LC-7 PC200LC-8 PC200-7 PC200-8 excavator
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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 GM35 is a high-torque, integrated hydraulic transmission designed for 20-ton to 24-ton class excavators. It features a massive variable displacement axial piston motor and a multi-stage planetary gearbox. Engineered specifically for the Komatsu PC200-7 and PC200-8 (Dash-7 and Dash-8) models, this unit is built to withstand extreme shock loads during heavy excavation, deep trenching, and steep-grade climbing. With 13 years of expertise in Komatsu final drives, we provide units that meet the rigorous durability standards required for high-production construction environments.
2. Comprehensive OEM Part Number Compatibility
This unit is a 100% direct "bolt-on" replacement for the following Komatsu factory part numbers and Nabtesco manufacturer codes:
Komatsu Gearbox/Final Drive Numbers:
20Y-27-00301 / 20Y2700301
20Y-27-00300 / 20Y2700300
20Y-27-00360 / 20Y2700360
20Y-27-00500 / 20Y2700500
20Y-27-00560 / 20Y2700560
Komatsu Travel Motor Numbers:
708-8F-00171 / 7088F00171
708-8F-00170 / 7088F00170
708-8F-00211 / 7088F00211
708-8F-00250 / 7088F00250
Machine Fitment:
Komatsu PC200-7 / PC200LC-7
Komatsu PC210-7 / PC210LC-7
Komatsu PC200-8 / PC200LC-8
Komatsu PC210-8 / PC210LC-8 / PC200-8 Hybrid
3. Technical Specifications & Performance
Motor Type: Variable displacement axial piston motor with integrated 2-speed (High/Low) travel function.
Reduction System: Multi-stage planetary reduction using high-grade, induction-hardened alloy gears for maximum fatigue life.
Max Working Pressure: Rated for continuous operation up to 34.3 MPa (343 bar) to ensure original factory tractive effort.
Sealing: Heavy-duty Duo-Cone (Mirror) mechanical floating seals protect the internal gearbox from mud, standing water, and abrasive grit.
Braking: Integrated spring-applied, hydraulic-release wet disc parking brake for failsafe holding on inclines.
4. Why Partner With a 13-Year Industry Expert?
Nabtesco OEM Authenticity: We provide original-spec GM35 units. This ensures the internal valve plates and piston sets match the original Komatsu hydraulic curve, preventing the tracking "drift" or "pulling" common with low-quality aftermarket drives.
100% Bench Testing: Every unit undergoes a rigorous performance validation. We verify volumetric efficiency, brake holding torque, and smooth 2-speed shifting under maximum load before shipment.
Factory-Direct Value: Access Original New or Premium OEM-spec units at competitive wholesale prices, providing a significant cost advantage over local dealership retail.
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. You must fill the planetary gearbox with SAE 80W-90 gear oil (approximately 4.5–5.5 liters) before operation.
Case Drain Connection: Verify that the case drain line is clear and connected to the correct port. Excessive backpressure in the motor case is the leading cause of shaft seal failure and internal damage.
System Decontamination: 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 in both directions for several minutes to purge 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 (standard is 21 holes for PC200-8).
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, hydraulic pressure settings, and troubleshooting.