Transmissão final 353-0545 para escavadora Caterpillar 320D2 L

Product Title
Final Drive Travel Motor for CAT 320D2 / 320D2 L Excavator | OEM Replacement Assembly
1. Product Overview
The travel motor and final drive assembly for the CAT 320D2 L is a heavy-duty, integrated unit designed to handle the increased power and efficiency of the D2 series. Combining a high-pressure variable displacement piston motor with a robust planetary reduction gearbox, this unit provides the essential traction and torque for heavy-duty earthmoving, quarrying, and construction. With 13 years of specialized experience, we provide units that meet the precise displacement and torque curves required by the 320D2’s advanced hydraulic system.

2. Comprehensive OEM Part Number Compatibility
This assembly is a direct replacement for several Caterpillar factory part numbers used across the 320D2 and 320D2 L global configurations:

Primary Part Numbers: 353-0545, 353-0609, 353-0645, 353-0646.

Next-Gen & Superseded Numbers: 441-3011, 441-3013, 480-6767.

Machine Fitment:

Caterpillar 320D2

Caterpillar 320D2 L (Long Undercarriage)

Caterpillar 320D2 GC

3. Technical Specifications & Performance
Motor Type: Two-speed variable displacement axial piston motor with integrated braking.

Gearbox Architecture: Multi-stage planetary reduction gears manufactured from high-strength, vacuum-degassed alloy steel for extreme durability.

Operating Pressure: Designed for continuous operation at 350 bar (35 MPa) to ensure full tractive effort on steep grades.

Sealing: Equipped with premium "Duo-Cone" (Mirror) floating seals to protect the gear system from sand, mud, and water.

Brake System: Integrated wet-disc parking brake with automatic hydraulic release for safe operation on slopes.

4. Why Partner With a 13-Year Industry Expert?
Hydraulic Precision: The 320D2 series requires specific flow-matching to work correctly with the machine's pump and main control valve. We verify your machine's serial number to ensure perfect synchronization.

Advanced Testing: Each final drive undergoes a rigorous bench test, including torque load testing, high-speed rotation, and pressure leak checks.

Factory-Direct Value: Access Original New or Premium OEM units at competitive wholesale prices, bypassing the high margins of local retail dealerships.

Global Logistics: Units are secured in reinforced, shock-proof export wooden crates and shipped via DHL, FedEx, or UPS, arriving in 3 to 7 business days.

5. Critical Installation & Maintenance Protocol
Gear Oil Filling (Mandatory): Units may be shipped without gear oil. You must fill the planetary gearbox with the correct volume of SAE 80W-90 or SAE 90 gear oil before use.

Case Drain Connection: Ensure the case drain line is properly connected and free of obstructions. Backpressure in the motor case is the leading cause of seal failure.

Contamination Control: If the previous unit failed mechanically, the hydraulic system (tank and lines) must be flushed. Small metal fragments from a previous failure can destroy a new motor within hours.

Bleeding Air: After installation, run the motor at low speed with no load (track off the ground) for several minutes to remove air from the hydraulic circuit.

6. Ordering & Professional Support
Fitment Verification: Please provide your Machine Serial Number (e.g., Prefix DFM, ZBT, or PBT) and verify the number of sprocket mounting bolts to ensure 100% fitment 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 guidance on installation, hydraulic pressure settings, and troubleshooting.