270-8170 final drive for Caterpillar 320D 320DL excavator
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Travel motor reduction 508-1316 final drive for Caterpillar 301.5 301.6 301.7CR 301.8 mini excavator
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1. Product Overview
The travel motor and final drive assembly is the critical transmission component that enables the CAT 320D/320DL to maneuver through heavy mud, steep inclines, and rocky terrain. This unit integrates a high-pressure, two-speed axial piston motor with a robust three-stage planetary reduction gearbox. With 13 years of expertise in heavy hydraulic systems, we provide units designed to match factory torque curves, ensuring your machine tracks straight and maintains full power under load.
2. Comprehensive OEM Part Number Compatibility
This assembly is a direct replacement for various Caterpillar factory part numbers used across 320D sub-models, long-track (L) versions, and regional specifications.
Common Part Numbers:
270-8170, 296-6298, 227-6913, 353-0609, 353-0613, 148-4696, 215-9982, 334-9987, 107-7028, 227-6949, 296-6299, 353-0611, 353-0615, 227-6035.
Machine Fitment:
Caterpillar 320D (Standard Track)
Caterpillar 320DL (Long Undercarriage)
Caterpillar 320D LRR (Log Loader / Reduced Radius)
Caterpillar 320D2 / 320D2 L
3. Technical Specifications & Performance
Motor Type: Variable displacement axial piston motor with integrated 2-speed switching (High/Low).
Gearbox Architecture: Multi-stage planetary reduction gears made from high-strength, heat-treated alloy steel for maximum fatigue resistance.
Operating Pressure: Rated for continuous operation at 35.0 MPa (350 bar) to meet factory breakout and tracking force specs.
Sealing Technology: Premium "Duo-Cone" (Mirror) floating seals designed to operate in extreme mud, water, and abrasive soil.
Braking System: Integrated multi-disc parking brake with automatic hydraulic release for safe operation on slopes.
4. Why Partner With a 13-Year Industry Expert?
Exact Ratio Matching: We ensure the planetary gear ratio matches your specific sub-model. A mismatched ratio causes the machine to "drift" to one side; we eliminate this risk through serial number verification.
Rigorous Load Testing: Every unit undergoes a 100% bench test, including high-pressure stall tests and torque load cycles, ensuring out-of-the-box reliability.
Factory-Direct Value: Access Original New or Premium OEM units at competitive wholesale prices, avoiding the high markups of local dealerships.
Global Rapid Logistics: Units are secured in reinforced, shock-proof export wooden crates. Rapid 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 often shipped without oil for transit safety. You must fill the planetary side with the correct volume of SAE 80W-90 or SAE 90 gear oil before use.
Case Drain Integrity: Ensure the case drain line is clear and connected to the correct port. High backpressure in the motor case will cause the main shaft seal to blow out immediately.
System Flushing: If the previous motor failed due to internal breakage, you must flush the hydraulic tank and lines. Residual metal shavings are the primary cause of premature failure in new units.
Air Bleeding: After installation, lift the track off the ground and run the motor at low idle in both directions for 5–10 minutes to remove air from the hydraulic lines.
6. Ordering & Professional Support
Fitment Verification: Please provide your Machine Serial Number (e.g., Prefix KGF, FAL, or MDE) and the number of sprocket mounting bolts to ensure 100% accuracy.
Instant Quote: Contact us today for current pricing, availability, and tiered quality options.
Technical Guidance: Our expert team is available 24/7 to provide professional advice on installation, pressure setting adjustments, and troubleshooting.