Section XV. COOLING SYSTEM - TM-10-3930-632-120078

TM 10-3930-632-12

4-51. Fuel Tank Filler Cap and Screen

clogged condition.

a. Inspection.

(3) Screen may be cleaned by directing a

blast of compressed air through the screen from inside-

(1) Loosen thumbscrew on fuel filler cap.

out.

Lift latch arm and pull filler cap and screen assembly

(4) Inspect gasket for damage and wear.

from fuel filler well.

Replace a worn gasket.

(2) Unscrew screen from fuel cap. Hold

screen up to a strong light and inspect for damage or

Section XV. COOLING SYSTEM

4-52. General

(1) Clean foreign matter from the cooling

fins by forcing compressed air through the radiator from

The purpose of the cooling system is to cool the engine,

the counterweight toward the engine.

torque converter, and transmission.

The system

(2)

Flush the cooling system with a

consists of the radiator, thermostat, fan, water pump,

chemical cleaner in accordance with current directives.

and hoses. Engine coolant is circulated by the water

After flushing, fill the cooling system with antifreeze

pump through the engine to the radiator where it is

solution (table 3-2) containing a rust inhibitor or water

cooled. The radiator is cooled by the flow of air

and rust inhibitor in accordance with current directives.

circulated by the fan. When the engine coolant is below

(3) If the cooling system is badly clogged

operating

temperature,

the

thermostat

closes,

with rust and scale, reverse flush the radiator and

preventing the circulation of coolant until it reaches the

engine as follows:

proper temperature. Torque converter and transmission

(a) Drain the cooling system.

oil is transferred through hoses to the lower part of the

(b) Loosen the clamps (fig. 4-36) and

radiator where it is cooled.

disconnect the upper hose from the radiator and the

4-53. Radiator

lower hose from the water pump.

a. Cleaning.

4-50