Figure 43. Printing the fuel pump.
Section VII. COOLING SYSTEM
The liquid cooling system consists of the radiator, hoses, lines, fittings, water pump, fan' and coolant passages in the
cylinder head and block. The coolant temperature is regulated from 175°F-195°F by a thermostat located inside the
Radiator, Hoses, Lines, Fittings, Water Pump, Fan and Belts
Inspect the radiator for leakage or damaged cooling fins. Make sure the air passages are clean. If air passages
are blocked, or obstructions such as dirt, leaves, or debris cannot be removed by hand, notify organizational
Warning: Cooling system is pressurized. Remove radiator cap slowly and only when engine is cool (below
120°F) or painful burns could result.
Caution: Do not add cold coolant to a hot engine or engine may be damaged. Allow engine to cool (below 120
°F) before adding coolant.
Check coolant level in radiator. Coolant should be 1 in. from bottom of filler neck (fig. 44).
Inspect the cooling system hoses and hose connections for leaks or deterioration. Particles of deteriorated hose
can be carried through the cooling system and slow or partially stop circulation.
Inspect water pump for drive pulley wobble, and grease or water leakage around the water pump shaft.
Warning: Never pull or pry on the fan. This can damage the fan blade and cause fan failure, resulting in
damage to equipment and serious injury to personnel.
Inspect the cooling fan for cracks, loose rivets, and bent or loose blades. Check the fan to make sure it is
securely mounted. Check the fan hub for wobble and grease leakage.
Inspect fan belts for cracks or frays. Belts that have a glazed or shiny surface indicate belt slippage. Belts
correctly installed and tensioned will show even pulley and belt wear.
g. Inspect thermostat housing and water manifold for leaks or loose connections.