Kubota Diesel Engine D1503

WARNING! To avoid personal injury or death: Be sure to check radiator hoses and clamp bands periodically. If radiator hose is damaged or coolant leaks, overheats or severe burns could occur.

Check to see if radiator hoses are properly fixed.

If hose clamps are loose or water leaks, tighten hose clamp securely.

Replace hoses and tighten hose clamps securely, if radiator hoses are swollen, hardened or cracked.

Replace hoses and hose clamps every 2 years or earlier, if checked and found that hoses are swollen, hardened or cracked.

Precaution at overheating: The event that the coolant temperature is nearly or more than the boiling point is called 'OVERHEATING'.

While running, make the following checks to see that all parts are working correctly.

If the coolant temperature warning lamp lights up or if steam or coolant does not stop squirting from the radiator overflow pipe, turn off the load and keep the engine idling (COOLING-DOWN) for at least 5 minutes to let it cool down gradually.

Check to see if the coolant runs short or if there is any coolant leak

WARNING! To avoid personal injury or death: Check or replace the fuel pipes after stopping the engine. Broken fuel pipes can cause fires.

If the clamp band is loose, apply oil to the screw of the band, and tighten the band securely.

Are the fuel pipes, made of rubber, worn out?

If the fuel pipes, made of rubber, become worn out, replace them and clamp bands every 2 years.

Are the fuel pipes and clamp bands found worn or damaged before 2 years' pass?

If the fuel pipes and clamp bands are found worn or damaged before 2 years' pass, replace or repair them at once.

After replacement of the pipes and bands, air-bleed the fuel system.

Important: When the fuel pipes are not installed, plug them at both ends with clean cloth or paper to prevent dirt from entering. Dirt in the pipes can cause fuel injection pump malfunction.

WARNING! To avoid personal injury or death: Be sure to stop the engine and remove the key before checking the belt tension. Be sure to reinstall the detached safety shield after maintenance or checking.

Applied moderate thumb pressure to belt between the pulleys

Belt tension in the proper range

IMPORTANT: If belt is loosen or damaged and the fan is damaged, it could result in overheats or insufficient charging. Correct or replace belt.

Measurement done properly according to the operation manual of the device being used

Measurement done immediately after installing the belt without rotating the pulleys

Initial Oil Change after 50hours. WARNING! To avoid personal injury or death: Be sure to stop the engine before draining engine oil and changing the oil filter cartridge.

When draining engine oil, place some container underneath the engine and dispose it according to local regulations.

Do not drain oil after running the engine. Allow engine to cool down sufficiently. Oil can be hot and cause burns

2. Remove the drain plug at the bottom of the engine, and drain all the old oil. Drain oil easier and completely while the engine is hot.

3. When letting out the oil, remove the filler plug too. With the filler plug still in place, it would be difficult to discharge the oil completely.

4. Add new engine oil up to the upper limit of the oil level gauge. Be careful not to add oil above the upper limit of the oil level gauge.

Replacing the oil filter cartridge

1. Replace the oil filter cartridge.

WARNING! To avoid personal injury or death: Be sure to stop the engine before checking and changing the engine oil and the oil filter cartridge.

Do not touch muffler or exhaust pipes while they are hot; Severe burns could result.

Always stop the engine and allow it to cool before conducting inspections, maintenance, or for a cleaning procedure.

Contact with engine oil can damage your skin. Put on gloves when using engine oil. If you come in contact with engine oil, wash it off immediately.

NOTE! Be sure to inspect the engine, locating it on a horizontal place. If placed on gradients accurately, oil quantity may not be measured.

Be sure to keep the oil level between upper and lower limits of the oil gauge. Too much oil may cause a drop in output or excessive blow-by gas.

On the closed breather type engine in which mist is sucked through port, too much oil may cause oil hammer.

While too little oil, may seize the engine's rotating and sliding parts. (The closed breather is an option.)

Check the engine oil level before starting or more than 5 minutes after stopping the engine.