TM 5-3825-226-24
The 9S7373 Air Meter Group is used to check
the air flow through the radiator core.
9S7373 AIR METER GROUP
Pressure Cap Test
Tools Needed:
9S8140 Cooling System Pressuring Pump
Group.
One cause for a pressure loss in the cooling
system can be a bad seal on the pressure cap of the
system. Inspect the pressure cap carefully. Look for
damage to the seal or to the surface that seals. Any
foreign material or deposits on the cap, valve, seal, or
surface that seals must be removed.
The 9S8140 Cooling System Pressurizing Pump
Group is used to test pressure caps and to pressure
check the cooling system for leaks.
TYPICAL SCHEMATIC OF PRESSURE CAP
A. Sealing Surface of cap and radiator.
To check the pressure cap for the pressure that
makes the pressure cap open, use the procedure that
follows:
1.
Remove the pressure cap from the radiator.
WARNING
If the engine has been operated and
the coolant is hot, loosen the
pressure cap to the first stop and let
the pressure out of the cooling
system, then remove the pressure
cap.
9S8140 COOLING SYSTEM PRESSURIZING
PUMP GROUP
2.
Put the pressure cap on the 9S8140 Cooling
System Pressurizing Pump Group.
3.
Look at the gauge for the exact pressure that
makes the pressure cap open.
4.
Make a comparison of the reading on the gauge
with the correct pressure at which the pressure
cap must open.
NOTE: The correct pressure that makes the pressure
cap open is on the pressure cap and is also in the
SPECIFICATIONS.
5.
If the pressure cap is bad, install a new pressure
cap.
Radiator and Cooling System Leak Tests
To test the radiator and cooling system for
leaks, use the procedure that follows:
1.
Remove the pressure cap from the radiator.
WARNING
If the engine has been operated and
the coolant is hot, loosen the
pressure cap to the first stop and let
the pressure out of the cooling
system, then remove the pressure
cap.
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