TM 10-4320-307-24
2-35
RADIATOR ASSEMBLY SERVICE/TEST/REPAIR/REPLACE (CONT).
PRESSURE TEST:
Wait until the temperature is below 120°F (50°C) before removing the coolant system
pressure cap. Failure to do so can cause personal injury from heated coolant spray.
1.
Remove radiator cap (1).
2.
Check coolant level and fill if necessary.
3.
Install plug (2) in overflow tube (3).
CAUTION
Do not apply more than 20 psi (140 kPa) air
pressure to the cooling system. The water
pump seal may be damaged.
4.
Install pressure tester (4) on radiator fill neck and apply
20 psi (140 kPa) maximum air pressure.
5.
Inspect for coolant leaks and repair if necessary.
6.
Remove pressure test equipment and plug (2) from
overflow tube (3).
NOTE
The pressure cap must seal within 2 psi (14
kPa) of the value stated on the cap, or it must
be replaced.
7.
Pressure test radiator cap.
8.
Install radiator cap.
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