Preventive Maintenance
Item 1
Check the oil level daily before starting the engine. Add oil, if necessary, to bring it to the proper level on the dipstick.
Select the proper grade of oil in accordance with the instructions in the Lubricating Oil Specifications. It is recommended
that new engines be started with 100 hour oil change periods. The drain interval may then be gradually increased, or
decreased, following the recommendations of an independent oil analysis laboratory or the oil supplier (based upon the
oil sample analysis) until the most practical oil change period has been established.
Item 2
Install new engine oil filter elements and gaskets each time the engine oil is changed. Check for oil leaks after starting
the engine. If the engine is equipped with a governor oil filter, change the element every 1,000 hours.
Item 3
Check the coolant level daily and maintain it near the top of the heat exchanger tank or the radiator upper tank.
Clean the cooling system every 1,000 hours or 30,000 miles using a good radiator cleaning compound in accordance
with the instructions on the container. After the cleaning operation, rinse the cooling system thoroughly with fresh water.
Then fill the system with soft water, adding a good grade of rust inhibitor or a high boiling point type antifreeze (refer to
Engine Coolant). With the use of a proper antifreeze or rust inhibitor, this interval may be lengthened until, normally, this
cleaning is done only in the spring or fall. The length of this interval will, however, depend upon an inspection for rust or
other deposits on the internal walls of the cooling system. When a thorough cleaning of the cooling system is required, it
should be reverse-flushed.
If the cooling system is protected by a coolant filter and conditioner, the filter element should be changed every 500
hours or 15,000 miles.
Item 4
Inspect all of the cooling system hoses at least once every 500 hours or 15,000 miles for signs of deterioration. Replace
the hoses if necessary.
Items 3 and 4
Items 1 and 2
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