3. Inspect all of the cooling system hoses at least once every 500-nours for signs of deterioration. Replace the
hoses as necessary.
4. Inspect the exterior of the radiator core every 1,000-hours and if necessary, clean it with a quality grease solvent
such as Oleum and compressed air. It may be necessary to clean the radiator more frequently if the engine is
being operated in dusty or dirty environment. Automatic radiator shutters should be checked daily for obstruction
5. Keep the fuel tank filled to reduce condensation to a minimum. This is especially important during periods of wide
temperature changes, high humidity or periods of non-usage. Select the proper grade of fuel in accordance with
the fuel oil specifications. Open the drain at the bottom of the fuel tank every 500-hours to drain off any
accumulated water or sediment.
6. Drain approximately one-fourth pint of fuel from the strainer daily to remove sediment and water by opening the
cock at the bottom of each shell. Install new elements every 300-hours or when plugging is indicated.
A method of determining when elements are plugged to the extent that they should be changed is based on the fuel
pressure at the cylinder head fuel manifold and the inlet restriction at the fuel pump. In a clean system, the maximum
pump inlet restriction must not exceed six inches of mercury. At normal operating speeds (1600 to 2100 RPM), the fuel
pressure should be between 50-70 psi. Change the fuel filter elements whenever the inlet restriction (suction) at the fuel
pump reaches twelve inches of mercury at normal operating speeds and whenever the fuel pressure at the manifold falls
to 45 psi.
inspection for debris is a must. Under adverse conditions it may be necessary