TM 5-3825-270-23&P
0074
PRESSURE TESTING - Continued
5.
Observe system pressure on radiator test kit pressure tester for 30 seconds.
6.
If a measurable pressure drop is detected, examine entire cooling system for possible external or internal leaks.
Repair as necessary.
7.
Release pressure.
8.
Remove radiator test kit pressure tester from radiator (Figure 22, Item 3).
9.
Install radiator cap adapter on pressure tester.
PRESSURE
TESTER
CAP
ADAPTER
4
Figure 23. Cooling System Pressure Testing.
10.
Install radiator cap (Figure 23, Item 4) on radiator cap adapter.
11.
Apply 13 psi (89.6 kPa) to radiator cap (Figure 23, Item 4) and hold for 10 seconds.
NOTE
If the cap releases early or late, the cap must be replaced.
12.
Observe that radiator cap (Figure 23, Item 4) releases pressure at 13 to 14 psi (89.6 to 96.5 kPa).
13.
Remove pressure tester and cap adapter from radiator cap (Figure 23, Item 4).
14.
Install radiator cap (Figure 24, Item 4) on radiator (Figure 24, Item 3) by pressing down and rotating clockwise.