22M-60-32500 final drive for Komatsu PC45MR-3 PC55MR-3 mini excavator
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Seller's contacts
+86 199 246...
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+86 199 2461 6345
China
China
China
China
China
Romania
Romania
Poland, Koziegłowy
Romania
Romania
Romania
Romania
Romania
Romania
Romania
Romania
Romania
Romania
Poland, Koziegłowy
1. Product Overview
The 22M-60-32500 series is a precision-integrated propulsion unit featuring a variable displacement axial piston motor and a heavy-duty planetary reduction gearbox. Designed for the 4.5 to 5.5-ton "Minimum Radius" (MR) series, this drive provides the high tractive effort required for heavy-duty grading and trenching while maintaining the smooth tracking essential for confined urban jobsites. With 13 years of expertise in Komatsu hydraulic transmissions, we ensure these units are calibrated to match the specific flow-sharing requirements of the PC55MR-3 chassis.
2. Comprehensive OEM Part Number Compatibility
This assembly is a direct "bolt-on" replacement for the following Komatsu factory part numbers:
Primary Part Numbers: 22M-60-32500, 22M-60-32501.
Successor Numbers: 22M-60-32502.
Manufacturer Ref: Often manufactured by Teijin Seiki/Nabtesco (GM06 series) or Nachi to Komatsu's exacting standards.
Machine Fitment:
Komatsu PC45MR-3
Komatsu PC55MR-3
(Also compatible with select PC45MR-5 and PC55MR-5 variants; please verify via serial number).
3. Technical Specifications & Performance
Motor Type: Two-speed variable displacement axial piston motor with integrated high/low speed switching.
Gearbox Architecture: Multi-stage planetary reduction using induction-hardened gears for maximum fatigue resistance and service life.
Max Working Pressure: Rated for continuous operation up to 26.5 MPa (265 bar) to ensure original factory tracking power.
Sealing: Equipped with premium "Duo-Cone" mechanical floating seals to prevent gear oil leaks and protect against mud and water ingress.
Braking: Integrated spring-applied, hydraulic-release wet disc parking brake for safe holding on steep inclines.
4. Why Partner With a 13-Year Industry Expert?
Hydraulic Synchronization: We understand Komatsu’s CLSS (Closed-center Load Sensing System). Our drives are calibrated to ensure the motor displacement matches your pump's output, preventing tracking "drift."
100% Bench Testing: Every unit undergoes a rigorous performance test. We verify volumetric efficiency, brake holding torque, and smooth 2-speed shifting before the unit is crated.
Factory-Direct Value: Access Original New or Premium OEM-spec units at competitive wholesale prices, bypassing the high markups of local dealerships.
Global Rapid Logistics: Units are secured in reinforced, shock-proof export crates. 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 (approx. 0.8–1.2 liters, depending on the model) before operation.
Case Drain Integrity: Ensure 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.
System Decontamination: If the previous motor failed mechanically, you must flush the hydraulic tank and lines. Metal shavings left in the system 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 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 (commonly 9 or 12).
Instant Quote: Contact us today for up-to-date pricing, tiered quality options, and current stock availability.
Technical Guidance: Our expert team is available 24/7 to assist with installation procedures, hydraulic pressure settings, and troubleshooting.