ناقل الحركة النهائي Bobcat travel motor reduction 6668730 لـ حفارة صغيرة Bobcat 337 341 435 C D E50 E55

OEM Final Drive Travel Motor for Bobcat 337 341 435 E50 E55 | Part No. 6668730

1. Product Overview
The 6668730 is a heavy-duty integrated propulsion unit consisting of a two-speed axial piston motor and a multi-stage planetary reduction gearbox. This assembly is designed to handle the weight and hydraulic flow of Bobcat's larger mini excavator range. With 13 years of specialized experience in hydraulic transmissions, we ensure these drives provide the precise torque required for heavy-duty digging, counter-rotation, and navigating steep grades.

2. Comprehensive OEM Part Number Compatibility
This unit is a direct "bolt-on" replacement for several Bobcat factory part numbers used across various generations of the 5-ton platform.

Primary Part Number: 6668730.
Alternative/Related Numbers: 6691497, 6689620 (Please verify specific sub-series).

Machine Fitment:

Legacy Series: Bobcat 337, 341.

400 Series: Bobcat 435 (G-Series, Long Track, and ZTS).

M-Series: Bobcat E50, E55 (early configurations—verify serial number).

3. Technical Specifications & Performance
Motor Type: Variable displacement axial piston motor with integrated 2-speed travel switching.

Gearbox Architecture: Multi-stage planetary reduction with induction-hardened gears for high impact resistance.

Max Working Pressure: Rated up to 350 bar (35 MPa) to match factory tracking force specifications.

Sealing: Heavy-duty "Mirror Seals" (Duo-Cone) designed to protect the gear system from mud, water, and abrasive soil.

Brake System: Integrated spring-applied, hydraulic-release wet disc parking brake for safe operation on slopes.

4. Why Partner With a 13-Year Industry Expert?
Hydraulic Calibration: We understand the specific flow requirements for the 337 through E55 models. We ensure the motor displacement is synchronized with your machine's hydraulic pump to prevent tracking drift.

Performance Validation: Every final drive undergoes a rigorous 100% bench test, including high-pressure leak tests and torque load cycles.

Factory-Direct Value: Access Original New or Premium OEM units at competitive wholesale prices, bypassing significant dealership markups.

Global Rapid Logistics: Units are secured in reinforced, shock-proof export 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 gear oil for safety. You must fill the planetary gearbox with SAE 80W-90 gear oil to the correct level before operation.

Case Drain Connection: Verify that the case drain line is clear and connected to the correct port. High backpressure in the motor case is the leading cause of shaft seal failure.

Hydraulic System Cleanliness: If the previous motor failed due to internal mechanical breakage, the hydraulic tank and lines must be thoroughly flushed. Contaminated oil will significantly shorten the life of a new unit.

Air Bleeding: After installation, lift the track off the ground and run the motor at low speed in both directions for several minutes to purge air from the hydraulic circuit.

6. Ordering & Professional Support
Fitment Verification: Because these machines have different undercarriage options (Short Track vs. Long Track), please provide your Machine Serial Number and the number of sprocket mounting holes (e.g., 9, 10, or 12 holes).

Instant Quote: Contact us today for up-to-date pricing, tiered quality options, and current stock status.

Technical Guidance: Our expert team is available 24/7 to provide professional advice on installation, pressure settings, and troubleshooting.