This task covers:
a. Pressure Test
b. Follow-On Maintenance
Engine OFF, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
Cooling system filled, (Para 6-4)
Tools and Special Tools
Tool Kit, General Mechanics: Automotive
(Item 74, Appendix G)
Adapter, Radiator (Item 2, Appendix G)
Tester, Pressure, Radiator (Item 71, Appendix G)
6-2. COOLING SYSTEM PRESSURE TEST.
Radiator, radiator cap, coolant, and hoses are very hot and pressurized during truck
operation. Let radiator cool before checking hoses. Failure to do so may result in serious
burns to personnel.
Use extreme care when removing radiator pressure cap. Sudden release of pressure can
cause steam flash which could seriously injure personnel. Slowly loosen cap to first stop
to relieve pressure before removing cap completely. After opening, securely tighten cap.
Use clean, thick waste cloth or like material to remove radiator pressure cap. Avoid using
gloves. If hot water soaks thru gloves, personnel could be burned.
Push down on radiator cap (1) and slowly turn 1/2 turn counterclockwise to relieve pressure from