ناقل الحركة النهائي Nachi PHV-3B 191-1384 لـ حفارة صغيرة Caterpillar 305 305.5 306

1. Product Overview
Component Type: Integrated Travel Motor and Planetary Final Drive Gearbox.

Function: Provides the high-torque output necessary for machine tracking, counter-rotation, and climbing capability in compact and confined job sites.

13-Year Specialized Authority: Supplied by a professional factory with over a decade of expertise in mini excavator undercarriage and transmission systems.

2. OEM Compatibility
Direct Fit Part Numbers: This unit is 100% interchangeable with Caterpillar part numbers 191-1384, 330-7517, 210-2758
,2102758, 1911384,337-3485, and 3307517.

Machine Fitment: Specifically engineered for the CAT 305, 305.5, 306 series mini excavators.

Installation Design: Features standard OEM mounting hole patterns and hydraulic port locations (A/B travel ports, plus Case Drain and Two-Speed pilot ports) for a seamless "drop-in" replacement.

3. Technical Specifications and Performance
Motor Type: High-efficiency axial piston motor with integrated two-speed (high/low) capability.

Gearbox Design: Multi-stage planetary reduction system utilizing hardened gear steel for maximum breakout torque and durability.

Sealing Technology: Equipped with high-performance "floating seals" (mechanical face seals) to prevent oil leakage and protect internal gears from mud, water, and debris.

Operating Pressure: Rated to handle the standard hydraulic relief settings of the CAT 305/306 series, ensuring consistent tracking speed and power.

4. Why Partner With a 13-Year Industry Expert?
Technical Precision: We understand the nuances of the CAT mini excavator hydraulic circuits, ensuring our motors match the original displacement and speed ratios.

Quality Assurance: Every final drive undergoes a rigorous bench test, including torque load testing and seal integrity checks, before being cleared for shipment.

Global Logistics: Shipped in reinforced, shock-proof packaging via DHL, FedEx, or UPS, typically arriving within 3 to 7 business days.

Direct Factory Pricing: Benefit from optimized supply chains and competitive wholesale rates, providing a cost-effective alternative to local dealer prices.

5. Essential Installation Protocol
Case Drain Connection: Ensure the case drain line is connected and unobstructed. Excessive backpressure in the case drain can cause the motor shaft seal to blow out.

Gear Oil Maintenance: The planetary gearbox section must be filled with the correct grade of gear oil (usually SAE 80W-90) before operation. Always check oil levels after the first few hours of use.

Hydraulic System Cleanliness: Always inspect hydraulic hoses for debris before connecting. Contaminated oil is the leading cause of premature piston wear in travel motors.

6. Ordering Information
Fitment Verification: Please share your machine's Serial Number or the number of mounting holes on the frame and sprocket to ensure 100% fitment accuracy.

Support: Our technical team is available 24/7 to assist with installation guidance and hydraulic troubleshooting.