Pressure Testing Cooling System - TM-10-3930-673-20-20135

TM 10-3930-673-20-2

e. Pressure Testing Cooling System.

NOTE

If cooling system pressure loss is

suspected, check radiator cap first. Any

foreign material or deposits on cap, cap

seal, or radiator opening can cause

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pressure loss.

(1)

Remove radiator cap (3) from radiator (4).

NOTE

Make sure the radiator is adequately

filled.

(2)

Attach cooling system pressurizer to radiator

filler neck.

(3)

Pressurize cooling system to between eight

and ten psi.

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(4)

Check cooling system for leakage.

(a)

Check radiator for visible leakage.

Replace radiator if leaks are present. Refer to Removal and Installation sections above.

(b)

Check all connections and hoses of cooling system for visible leakage. Replace leaking heater and radiator

hoses as required (Para 7-4).

NOTE

If leakage is not observed in Steps (a) and (b) above, continue to pressurize system for five minutes

and observe pressure gauge on cooling system pressurizer.

If pressure remains constant after five minutes of pressurization, radiator and cooling system do not

have leakage.

If pressure lowers during five minutes of pressurization, internal cooling system leak in engine or

transmission is present. Refer to Direct Support Maintenance.

(5)

After test is completed, remove pressurizer from radiator filler neck and install radiator cap (3) on radiator

(4).

END OF TASK

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