ENGINE RADIATOR - SERVICE.

TM 5-1730-245-14

4.20 ENGINE RADIATOR - SERVICE.

THIS TASK CONSISTS OF: a. Draining

Flushing

Refilling

INITIAL SETUP

Tools:

Equipment Condition:

Toolkit, General Mechanics (Item 5, Section III, Appendix B)

All panels (5, 8, fig. 1-2) removed.

Engine stopped and cool.

General Safety Requirements

Cabinet top cover removed. Refer to para 4 16.

Air filter removed. Refer to para 4 18.

WARNING

Material/Parts Required:

Coolant/antifreeze is toxic. Avoid spilling of

Coolant/Antifreeze, item 1, Appendix E

coolant/antifreeze, fuel or fluids. Clean up minor

Gasket, thermostat housing, item 1, Appendix 1.

spills immediately. For large spills, notify your supervisor.

a. Draining the engine radiator. Refer to figure 4-10.

1) Slide a suitable waste container under the hydraulic power supply at the drain valve (3).

2) Remove rain cap (5). Remove the radiator fill cap (1). Turn the drain valve (3) counterclockwise to

drain the coolant/antifreeze. Close the drain valve (3) after draining by turning in valve clockwise.

3) Dispose of the waste coolant/antifreeze in accordance with local SOP.

b. Flushing the engine radiator. Refer to figure 4-13.

1) Remove screws (1) and washers (9).

2) Remove thermostat housing cover (2). Leave hose (7) connected to thermostat housing cover (2).

3) Remove thermostat housing gasket (3) and thermostat (4). Discard gasket.

4) Flush the engine through the thermostat housing (8) until clean water emerges from the housing cover

(2).

5) Install thermostat (5), thermostat housing gasket (3) and thermostat housing cover (2). Install screws

(1) and washers (9). Torque to 15.5 ft lb/21 Nm.

4-25