TOPIC 3. RADIATOR

TM 10-3930-644-14&P

TOPIC 3. RADIATOR

A. DESCRIPTION

The radiator is the fin and tube type and is vertically

supported by angle bracing to the truck frame. The front

of the radiator is protected from structural damage by a

heavy grille mounted in the counterweight. An overflow

tube is connected to the filler neck and leads to the

bottom of the radiator.

Figure 3-2. Water Drain Cock Location

3. Loosen the retaining hose clamps and remove

the inlet and outlet hoses from the top and

bottom of the radiator.

NOTE

An oil cooler is an integral part of the

Figure 3-1. Radiator Assembly

bottom of the radiator to prevent

overheating of the transmission. The

B. REMOVAL

oil cooler lines must be removed

prior to removing the radiator.

When it becomes necessary to remove the radiator for

service, the following procedure is recommended:

4. Remove the securing capscrews and

the

radiator grille from the back of

the

1. Remove the engine side panels and raise the

counterweight.

operator's seat.

5. Remove the capscrews which hold the radiator

2. Remove the radiator cap, open the drain cocks

in position on the mounting bars located on the

beneath radiator and alternator, and drain the

frame inside the counterweight.

cooling system.

6. Slide the bottom of the radiator out of position.

CAUTION

After the filler neck of the radiator has cleared

Cooling system is pressurized.

the Inside top of the counterweight, the radiator

Coolant can boil if pressure is

can easily be removed.

released at atmospheric pressure.

When removing radiator cap protect

C. INSPECTION-SERVICE

hand with glove or rag. Rotate cap

slowly until a hissing sound is heard.

If the tubes in the radiator become clogged, the

Leave cap in position until hissing

obstructions may sometimes be removed by reverse

stops, then turn cap until hissing

flushing the radiator.

starts again or cap comes free.

R-155-1

3-109