TM 5-3805-280-24-1
System Operational Checks
WATER PUMP CHECK
A--Weep Hole
YES: Seal (B) has failed.
B--Seal
Replace seal or water
pump. Go to Engine
Repair chapter and
Engine stopped.
Cooling System.
Is coolant leaking from weep hole (A)?
NO: Go to next check.
T7690AC
UN27JAN92
9010
10
4
1/1
ENGINE HEAD GASKET
Engine at normal temperature.
YES: Head gasket is OK.
SEAL CHECK
Go to next Check.
Radiator full.
NO: If there is a constant
flow of bubbles from tube,
Install radiator cap and tighten.
loose or damaged
cylinder head or a leaking
Place end of radiator overflow hose into a container of
head gasket may be
clear water.
indicated. Go to Engine
T6171AR
UN25MAY89
Repair chapter.
Operate engine at fast idle. Load engine by holding a
hydraulic function over relief.
Look for bubbles coming from overflow tube. Do bubbles
flow from tube intermittently?
1/1
FAN BLADES CHECK
Are fan blades bent or twisted?
YES: Replace fan.
Are fan blades cracked or nicked?
NO: Go to next check.
T7694AH
UN03FEB92
1/1
3-16
