Kubota Tractor Maintenance

by Wesley Tucker

Kubota of Japan manufactures a wide assortment of tractors and heavy equipment for earth moving, loading and carrying. Maintaining a Kubota tractor means knowing four mechanical systems and making sure each one operates according to specifications: lubrication and cooling, drivetrain, steering and braking and electrical. Maintain those four systems and the tractor will have years of worry-free and profitable operations.

Lubrication and Cooling

Any motorized vehicle needs clean oil for lubrication and coolant to keep the engine from melting itself. The Kubota engine has the oil pan located in the middle of the engine bay. Find the drain plug (a large six-sided nut) and place a bucket under the plug. Remove the plug with a wrench and drain the oil. Located on the side of the motor is a plastic soup-can shaped plastic cylinder. That’s the oil filter. Remove it with a filter wrench (a tool costing a few dollars) and install a new filter. Also, depending on the environment where you operate the tractor, check the air filter DAILY. The air filter is located near the front of the engine in a square plastic box. Excessive dust and dirt can cause the filter to clog quickly. Replace it if there’s too much dirt to brush away. The radiator cap is right on top of the engine chassis. Open it when the engine is cold and check the fluid level. Add more if necessary.


The drive train is the motor, transmissions and axles. Once the oil is changed check all the spark plugs and spark plug lead wires. These are located on each side of the motor. If a plug or lead is excessively fouled with black carbon buildup or oil, clean with a wire metal brush. Also check the connection lead spark plug wire and clean any corrosion. Check the transmission fluid in the transmission fluid fill cap. A small dipstick will show the correct level. Use the owner’s manual to find all the lubrication points. These are small fittings a grease gun can attach to and inject a small portion of grease. These fittings all along the bottom and side of the engine, axles and gear box on the tractor’s bottom.

Steering and Braking

Make sure there’s not too much play in the steering wheel or brake pedal. If you move either more than an inch before the wheels turn or the brakes engage, check the steering linkage adjustment and the brake fluid levels. The steering adjustment is made where the steering column meets the front axle. Turn left or right as indicated by the owner’s manual. Brake fluid is added to the brake fluid cap next to the wall between the engine and driver’s cab.


Make sure all the brake lights, warning lights, headlights, horn and safety features work properly. Check the fuse box first if any electrical apparatus or light is not working. Replace light bulbs if needed. All the bulbs on the Kubota Tractor can be accessed with a screwdriver to remove the reflector cover plastic.

About the Author

Wesley Tucker is a lifelong southerner whose politics are objective, whose sports are many and whose avocations range from aviation to anthropology to history and all forms of media. With a master's degree in mass communications from the University of South Carolina College of Journalism, Tucker has been a writer for more than 30 years, with work ranging from news reports to feature stories.

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