Maintenance Instructions

CHECKING/SERVICING

Fuel Lines and Clamps

Every year, inspect the fuel supply line from the tank to engine for deterioration or damage. Also, inspect the fuel line clamps for tightness. Good preventive maintenance calls for complete replacement of fuel lines and clamps every two (2) years.

NOTE: This procedure is of special importance for the diesel engine due to poor performance when air is injected with the fuel.

Radiator Hoses and Clamps

Inspect the radiator hoses every 200 hours for deterioration or damage. Also check the tightness of the hose clamps. Good preventive maintenance calls for complete replacement of the radiator hoses and clamps every two (2) years.

Engine Valve Clearance

Check and adjust the Kubota engine valve clearance every 800 hours. Refer to the Kubota Engine Owner’s Manual and Workshop Manual for specifications and procedure to check the valve clearance. For engine servicing, contact an authorized Kubota engine dealer or a trained engine technician.

IMPORTANT: Always use the proper engine service manual when working on the engine. Improper engine maintenance or adjustments will adversely affect engine operation, performance, and durability and may VOID the warranty.

Fuel Injection Nozzle Pressure

Check and adjust the Kubota diesel engine fuel injection nozzle pressure yearly or every 1000 hours (or in case of low power). Refer to the Kubota Workshop Manual for specifications and procedures to check nozzle pressure. For engine servicing, contact an authorized Kubota engine dealer or a trained engine technician.

IMPORTANT: Always use the proper engine service manual when working on the engine. Improper engine maintenance or adjustments will adversely affect engine operation, performance, durability, and may VOID the warranty.

WARNING

The fuel oil injection system operates under high pressure and can penetrate the skin and result in serious injury. Unqualified persons should not remove or attempt to adjust a pump injector, nozzle, or any part of the fuel injection system.

Fuel Valve Solenoid

The starting and stopping of the diesel engine is controlled by the fuel shut-off valve. If the engine cranks, but does not start or the engine does not stop when the ignition switch is turned OFF, check operation of the fuel valve.

Raise the mower body and locate the fuel valve on the engine. The valve is operated by an electric solenoid which is controlled by the ignition switch. The valve is open when the ignition key is moved to the START or RUN position, and the valve is closed when the ignition key is moved to the OFF position.

Fuel Valve

 

Fuel Shut-Off

Solenoid

 

Valve

 

 

 

Fuel Control Arm in Closed Position

Fuel Valve Closed (Engine OFF Position)

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