REPAIR OF COOLING SYSTEM
Section I. RADIATOR
Watch the radiator for signs of bubbles coming
from the core during this pressure test. The pressure
cap should rise at approximately this pressure. Shut off
The radiator consists of a series of tubes through
the air to the radiator and allow the air to escape until the
which the coolant is circulated. Fins are attached to the
safety cap seats. Hold the pressure for 5 minutes. If no
tubes to give a more extended surface through which
bubbles appear from the core, the radiator is good. If
heat can be dissipated. For most effective use, these fins
bubbles appear, mark the origins of the bubbles and
must be kept clean and free from accumulated dirt.
remove the radiator from the tank.
Remove the radiator (TM 10-3930-632-X2).
Replace a defective drain cock.
Place the cap tightly on the radiator and close
Solder any holes found in the radiator.
the drain cock. Block off the upper hose connection;
Solder all tubing connections that leak
connect an air line to the lower hose connection with an
air pressure gage in the line.
Repair a badly damaged radiator. If radiator is
Submerge the radiator in a tank of water.
still defective, replace it with a new radiator.
Open the air line to the radiator and apply a pressure of
Install the radiator (TM 10-3930-632-12).
not more than 8 to 10 PSI.