TM 5-3895-379-23-1
0135
PRESSURE TEST
WARNING
DO NOT service cooling system unless engine has been allowed to cool down. This is a
pressurized cooling system and escaping steam or hot coolant may cause burns.
DO NOT remove cooling system radiator cap when engine is hot. Allow engine to cool
down. Loosen cap to first stop and let any pressure out of cooling system, then remove
cap. Failure to follow this warning may cause burns.
Wear effective eye, glove, and skin protection when handling coolants. Failure to do so
may cause injury.
1.
Push down on radiator cap (Figure 1, Item 1) and slowly turn 1/2 turn counterclockwise to relieve pressure
from radiator (Figure 1, Item 3).
2.
Turn radiator cap (Figure 1, Item 1) additional 1/2 turn left and remove radiator cap from radiator
(Figure 1, Item 3).
3.
Install radiator cap (Figure 1, Item 1) on coolant system pressure tester (Figure 1, Item 2) and pressurized
radiator cap.
NOTE
Pressure valve on radiator cap must start to open between 7-10 psi (48-69 kPa). If pressure
valve does not open, replace cap.
4.
Remove radiator cap (Figure 1, Item 1) from coolant system pressure tester (Figure 1, Item 2).
5.
Install coolant system pressure tester (Figure 1, Item 2) on radiator (Figure 1, Item 3) and pressurize coolant
system to 7-10 psi (48-69 kPa). If pressure does not hold for two minutes, check for coolant leaks and replace
or repair as necessary.
6.
Slowly remove coolant system pressure tester (Figure 1, Item 2) from radiator (Figure 1, Item 3).
7.
Install radiator cap (Figure 1, Item 1) on radiator (Figure 1, Item 3).
0135-2
03/15/2011Rel(1.8)root(maintwp)wpno(M00073)
