SERVICING AND PREVENTIVE MAINTENANCE
1. Check engine crankcase oil level daily before starting engine. When level reaches low mark, fill as near to high
mark as possible using same grade and brand of oil as originally used. (Do not overfill.)
It is recommended that new engines be started with 100-hour oil change periods. For highway usage this corresponds to
approximately 3,000 miles or f9r short-haul operation, approximately 1,000 to 2,000 miles. The drain interval may then be
gradually increased, or decreased following the recommendations of an independent oil analysis laboratory, or oil supplier
(based upon the sample analysis) until the most practical oil change period for the particular service has been established.
At oil change period, run engine until water reaches operating temperature. Shut down engine and drain crankcase before
engine cools. Drain oil filter and install new filter elements and gaskets. It is recommended that cartridge be presoaked by
filling filter body with new engine oil prior to replacing cover. After filling with new oil run engine for about five minutes and
check for leaks. Stop engine and recheck oil level; add system makeup oil if necessary.
2. Check coolant level daily and maintain the level near the top of radiator upper tank.
Clean the cooling system every 1,000-hours, using a good cleaning compound in accordance with instructions on the
container. Following the cleaning operation, rinse and reverse flush the cooling system thoroughly with fresh water; then fill
the system with soft water, adding a good grade of 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. Do NOT wait for the first frost before filling the system with anti-
freeze.
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