TM 5-3810-300-24 & P2
TROUBLESHOOTING.
TROUBLE
PROBABLE CAUSE
REMEDY
Engine overheating
Water pump leaking air into
Repair water pump.
(continued).
system.
Radiator hose collapsed or rot-
Replace radiator hoses.
ting inwardly.
Radiator pressure cap damaged.
Replace cap.
Cylinder head loose, causing ex-
Check and tighten.
haust gas leakage into cooling
system.
Water pump impeller corroded or
Repair water pump.
loose on shaft.
Antifreeze protection inade-
Check and add antifreeze
quate, causing partial freeze-up.
as required.
After-boil:
Improper installation of therm-
Check and correct.
ostat.
Damaged thermostat.
Replace thermostat.
High temperature thermostat
Use thermostat of proper
used with alcohol-type anti-
operating range; use
freeze.
ethylene-glycol type an-
tifreeze.
Excessive sediment in cooling
Drain and flush cooling
system.
system.
Foaming:
Excessive sediment in cooling
Drain and flush cooling
system.
system.
Air or exhaust leak into cool-
Check, locate, and repair.
ing system.
Faulty pressure cap.
Replace pressure cap.
Alcohol base antifreeze.
Use ethylene-glycol type
antifreeze.
Broken or loose fan belt.
Replace or tighten, as
required.
Radiator clogged.
Drain and flush cooling
system.
Hose collapsed or clogged.
Replace all hoses.
Damaged pressure cap.
Replace cap.
Worn or corroded impeller on
Replace water pump impel-
water pump.
ler and seals.
FUEL SYSTEM.
The carrier fuel tank should be kept filled, especially overnight, to reduce condensation to a minimum. Open the drain at
the bottom of the fuel tank every 500 operating hours to drain off any water or sediment.
Fuel Strainer and Filter Check.
Daily drain approximately a cup of fuel from the fuel strainer and filter to
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