Section II. RADIATOR AND MOUNTING BRACKETS
40. General
b. Inspection, Testing, and Repair.
The engine coolant is circulated through the engine and
(1) With the radiator filled, examine the core
the radiator by the belt driven water pump. The water
for leaks.
pump drive pulley drives the water pump and also serves
as a mount for the fan blade. Cooled liquid is drawn from
(2) If a leak in a radiator cannot be located,
the bottom of the radiator and pumped through the oil
plug all outlets except the filler opening,
cooler and passages in the engine block and cylinder
and place the radiator in a tank of water.
heads. The heated liquid leaves the cylinder head
Wrap a cloth around an air hose connected
through the water manifold, where the thermostat controls
to a low pressure air source not in excess of
the opening of the bypass. The bypass directs the coolant
10 psi. Insert the hose in the filler neck,
to the suction side of the water pump until the coolant
using the cloth to seal the opening, and
temperature reaches 165 F. The thermostat then begins
submerge the radiator.
Teaks will be
to open and the coolant is directed through the radiator
shown by air bubbling up through the water.
which is cooled by air circulated through it by a 26inch
pusher-type fan and recirculated by the water pump.
(3) Solder or braze leaks in the core or tanks.
41. Radiator and Mounting Brackets Removal and
If the radiator is beyond repair, replace it
with a new assembly.
Disassembly
a. Removal.
(4) Straighten bent fins.
43. Radiator and Mounting Brackets Reassembly and
(1) Remove the radiator cowling (TM 6-382-
205-20/2).
Installation
a. Reassembly. Refer to figure 10 and reassemble
(2) Remove the radiator brace, drain the
the radiator and mounting brackets in the reverse order.
radiator, and disconnect the radiator hose.
b. Installation.
(3) Refer to figure 9 and remove the radiator
and mounting brackets from the unit.
(1) Refer to figure 9 and install the radiator and
mounting brackets on the unit.
b. Disassembly. Refer to figure 10 and disassemble
the radiator and mounting brackets.
(2) Install the radiator brace and connect the
radiator hose.
42.
Radiator and Mounting Brackets Cleaning,
Instruction, Testing, and Repair
(3) Install the radiator cowling (TM 5-3820-205-
20/2).
a. Cleaning. Remove the dirt and foreign matter
from the radiator core by using compressed air directed at
the front of the radiator.
(4) Service the radiator (TM 5-3820-206-10/2).
AGO 8456A
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