Used Travel Hydraulic Motors

Travel Gear Motor: Role and Function

The used travel hydraulic motor, often referred to as a gear motor, powers the movement of machines whose weight rests on a tracked undercarriage. It receives the hydraulic oil flow generated by the machine’s main pump in motion and converts it into mechanical torque. This torque is then multiplied by the integrated planetary gear reducer, providing the force necessary to drive the output sprocket and propel the machine, even under full load and in tough terrain conditions.

Each track has its own gear motor, allowing the tight turns and precise maneuvers typical of mini excavators on site. The mobility of these machines depends directly on the proper functioning of these two travel motors: a failure on just one side is enough to immobilize the machine.

Main Components of a Travel Motor

• Piston Hydraulic Motor: converts hydraulic oil pressure (160 to 280 bars) into rotation of the output shaft
• Planetary Gear Reducer: multiplies the rotation speed to increase the torque available on the output sprocket
• Parking Brake: integrated disc brake, spring-applied and hydraulically released, which holds the machine stationary when stopped
• Sliding Mechanical Seal (Lifetime Seal): ensures durable sealing between the fixed and rotating parts of the assembly
• Drain Port: evacuates internal leaks from the housing and maintains pressure within acceptable range
• Secondary Hydraulic Line: channels oil from the main pump to the gear motor according to travel control commands

When to Replace Your Travel Hydraulic Motor?

Several indicators help detect a failure before it impairs the machine’s operation. A gradual loss of power is often the first sign: the machine struggles to climb slopes or slows down without an apparent reason. Premature oil leaks around the gear motor, unusual noises (knocking, squealing), or excessive vibrations during travel indicate advanced internal wear. Abnormal overheating of the hydraulic system, visible on the dashboard or noticeable by touch on the housing, generally points to an internal leak or blockage of the drainage system.

In such cases, replacing with a used travel gear motor inspected in our workshop is often the most cost-effective solution to get the machine back into service quickly, especially when the cost of repair exceeds the value of the worn part.

Choosing the Right Travel Motor for Your Mini Excavator

To identify the suitable spare part for your machine, several criteria are crucial:

• Exact brand and model of the machine: gear motors from Komatsu, Yanmar, Doosan, Kubota, Caterpillar, and other partner manufacturers are not interchangeable between models
• Machine weight: the displacement of the hydraulic motor and the gear ratio of the planetary reducer vary depending on the machine’s operating weight
• Original reference number: if you have the manufacturer’s part number, it allows a tailored search in our stock
• Motor type: adaptable travel motor (Korean manufacturers) or original part according to your preferences and choice of a motor matching your budget
• Connection configuration: specify left or right side, various gear connections, and hydraulic fitting dimensions

Our team assists you in identifying the used hydraulic motor matching your machine, with a tailored search in our multi-brand stock.

Maintenance and Oil Change of the Travel Gear Motor

The lifespan of a travel motor depends directly on following maintenance intervals. The first oil change should occur after 50 to 100 hours of operation: this removes iron particles and break-in residue that accumulate in the housing during the initial hours of use. Afterwards, perform an oil change every 500 to 1,000 hours, or at least once a year depending on machine usage frequency.

Use hydraulic oil with viscosity suited to climatic conditions and in accordance with the original manufacturer’s recommendations. Regular replacement of the machine’s hydraulic filter limits rapid leaks and prevents premature wear of internal seals. Periodic visual inspection of connections, the drain port, and the output sprocket allows detecting leaks without heavy intervention. For used Komatsu parts, used Yanmar parts, used Doosan parts, or used Kubota parts, our multi-brand stock covers the most common models found in the construction machinery market.