Radiator - TM-5-4320-258-340025

TM 5-4320-258-34

3-7.

Radiator

the radiator in a tank of water and apply 10 psi air

a. Removal. Remove the radiator (TM 5-

pressure to the interior of the radiator. Check for air

bubbles that could indicate a leak. If a leak is found,

4320- 258-12).

b. Cleaning.

mark the area for repair.

(3) Inspect all hardware for cracks and for

(1) Clean the exterior of the radiator by

worn or stripped threads.

flushing in a reverse-flow direction with stream of water

(4) Replace all parts damaged beyond

to remove all bugs and debris. Remove any greasy or

repair.

oily deposits with cleaning solvent (FED. Spec. P-D-

d. Repair.

680).

(1) Repair leaks by soldering. Be sure that

(2) Reverse-flush the interior of the

the repair does not block or retard circulation through

radiator, using a flushing gun.

c. Inspection and Testing.

any tubes. There shall be no blocked tubes.

(2) Straighten any bent or damaged fins.

(1) Inspect all parts for cracks, signs of

Replace any damaged parts.

leaking tubes or gaskets, damaged thread's, or other

e. Installation. Install the radiator (TM 5-4320-

obvious damage.

Caution: Do not exceed 10 psi air pressure

258-12).

3-8.

Water Pump

for radiator testing. Excess pressure will damage

a. Removal. Remove the water pump from

the radiator.

Be sure' the radiator core is

completely drained before testing. When testing at

the engine (TM 5-4320-258-12).

b. Disassembly.

low pressure, it is possible that water within the

(1) Disassemble the water pump only if the

core could prevent air from passing out of small

shaft binds, the seal leaks, the housing is cracked or

holes, and the leak could pass undetected.

damaged, or there are other signs of faulty operation.

(2) Make sure the radiator is completely

(2) Use a puller to pull the drive pulley (2,

drained of coolant. Plug all openings, except one

fig. 3-8) from the water pump

through which compressed air can be applied. Immerse

3-11