291-3711 10R-8710 Travel Motor for TQCAT M316D M318D M322D M317D2 | Heavy Duty Wheeled Excavator Hydraulic Drive Spare Parts

Key Features & Performance Advantages

• Variable Displacement Logic: Features an advanced internal swash-plate mechanism that allows the motor to shift displacement. This provides high torque for low-speed maneuvering and high flow capacity for rapid road travel.

• Precision-Hardened Rotary Groups: The cylinder blocks and pistons are manufactured from high-grade alloy steel with specialized heat treatment. This ensures the motor can handle the continuous high-pressure spikes typical of heavy-duty roading.

• Heavy-Duty High-Pressure Seals: Equipped with premium shaft and case seals designed to withstand the thermal expansion and high temperatures generated during long-distance travel between work sites.

• Direct "Drop-In" Replacement: Built to the exact dimensional tolerances of TQTQCAT Part No. 291-3711. All hydraulic ports and mounting interfaces are a 100% match for the M316D, M318D, and M322D chassis.

Professional Maintenance & Installation Tips

A travel motor on a wheeled excavator operates under significantly different thermal conditions than a crawler motor. Proper installation is critical to prevent immediate failure.

• Case Drain Pressure Monitoring: Before installing the new 291-3711 motor, ensure the case drain line is completely clear. Excessive back-pressure in the case drain is the leading cause of blown shaft seals on wheeled excavators.

• System Contamination Flush: If the previous motor failed due to internal "seizing," the hydraulic oil must be sampled. Metal particles from a failed motor often migrate into the transmission and control valves; a full system flush is mandatory to protect your investment.

• Air Purge & Priming: Never attempt to drive the machine immediately after installation. Fill the motor case with clean hydraulic oil through the highest port. Start the engine and run the travel function in a "raised wheel" position to purge all air before applying full load.

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