MAINTENANCE 18.1.2 FUEL The fuel pump is a precision instrument, and fuel containing water or dirt will cause it to malfunction. Be extremely careful when storing or adding fuel to keep out impurities. Always use the fuel specified in the Operation and Maintenance Manual. Fuel may congeal depending on the temperature at which it is used (particularly in low temperatures below-15 (5 Fill the fuel tank after completing the day's work to prevent the moisture in the air from condensing to water inside the fuel tank. Drain the sediment and water from the fuel tank before starting the engine or at least 10 minutes after adding fuel.
If the engine runs out of fuel, or if the filters have been replaced, it is necessary to bleed the air from the circuit. 18.1.3 COOLANT Use clean water. River water contains large amounts of calcium and other impurities, and its use will lead to scale forming in the engine and radiator. This will prevent proper heat exchange and cause overheating. For specific water requirements, see “20.7 COOLANT SPECIFICATIONS” on page 3-13. When handling anti-freeze, always observe the precautions given in the Operation and Maintenance Manual. An anti-freeze concentration greater than 68% will adversely affect freeze protection and heat transfer rates.
Anti-freeze concentrations between 68% and 100% actually have a higher freezing point and reduced heat transfer rates than a 68% anti-freeze concentration and should not be used. All cooling system inhibitors, including those in anti-freeze solutions, become depleted through normal operation. If the inhibitors in anti-freeze are allowed to become depleted, the anti-freeze becomes corrosive and attacks and coats the metallic surfaces of the cooling system which reduces heat transfer. Cooling system conditioners which contain these inhibitors must be added to maintain corrosion protection. Anti-freeze is flammable. Do not expose it to flame, sparks or fire.
The required proportion of anti-freeze to water differs according to the ambient temperature. For details of the mixing proportions, “see 20.7 COOLANT SPECIFICATIONS” on page 3-13. If the engine overheats, wait for the engine to cool to a safe level before adding coolant. A low coolant will cause overheating and will also cause problems with corrosion from the air in the coolant. 18.1.4 GREASE Grease is used to reduce friction and help prevent wear, twisting and noise at the joints. Grease fittings not referred to in the maintenance schedule do not require any scheduled greasing. Add grease to these areas only if something squeaks or becomes stiff.
Always wipe off all of the old grease that is pushed out when greasing. Be particularly careful to wipe off old grease in places where sand or dirt in the grease would cause wear of the moving parts. 3-6 WA420-3MC