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Figure 6-8. Water pump - exploded view.
Figure 6-7. Radiator removal and Installation.
(4) Solder any holes found. in the radiator.
(5) Solder all tubing connections that leak
b. Removal.
under pressure.
(1) Remove side panels. (fig. 3-60)
d. Installation. Refer to paragraph 67b and install
(2) Drain cooling system.
the radiator in reverse order.
(3) Remove 4 capscrews that fasten hood to
6-8. Water Pump
radiator.
(4) Refer to figure 6-7, and remove the fan
a. General.
Refer
to
paragraph
350a
for
guard by removing screws (8).
description.
(5) Refer to figure 6-7, remove nuts (13),
b. Removal. Refer to paragraph 3-50 and remove
washers (12), spacers (11), and radiator (9).
the water pump.
c. Disassembly.
Refer
to
and
c. Testing and Repair.
disassemble the water pump.
(1) Place the cap tightly on the radiator and
d. Cleaning, Inspection and Repair.
sea) the drain hole.
Block off the upper hose
connections; connect an air line to the lower hose
connection with an air pressure gage in the line.
(1) Clean all parts with an approved cleaning
solvent; dry with clean compressed air.
(2) Submerge the radiator in a tank of water.
Open the air line to the radiator and apply a pressure of
(2) Inspect the seal for defects; inspect the
not more than 15 psi.
seal spring for deformation or loss of tension, Replace
seal if any part is defective.
(3) 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 air to the radiator and allow the air to
escape until the safety cap seats. Hold the pressure for
5 minutes.  If no bubbles appear from the core, the
radiator is good. If bubbles appear, mark the origins of
the bubbles and remove the radiator from the tank.
6-8

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