Thermostat - TM-10-3930-624-120071

(e) Remove the outlet pipe from the

the center of counterweight. After top of radiator has

cleared inside top of counterweight, it can be easily

thermostat housing and remove the thermostat

lifted out.

Reinstall the outlet pipe.

c. Installation.

(f) Connect the flushing gun to the

(1) Install radiator by a direct reversal of

upper hose on the thermostat housing as shown in figure

removal procedure.

4-16. Completely fill the engine water jacket with water.

Hold a hand over the water pump outlet to be sure the

water jacket is completely full. Shut off the water

Note. If spacers were present

supply. Blow the water out of the water jacket with air.

between radiator mounting flange

Repeat this procedure until the flushing stream runs

and frame, be sure to replace in

clean. Disconnect the flushing gun.

original locations.

If none were

present. but there is space between

radiator mounting flange and frame,

use spacers as necessary to prevent

strain on radiator when mounting

bolts are tightened.

(2) After radiator is installed, measure

distance between leading edge of fan blades and

radiator core. This dimension should be approximately

7/8'". Also, make certain cooling fan is centered in

radiator shroud.

(3) Close radiator drain cock, fill system and

check for leaks.

(4) Install rear grille and side panels.

4-29. Thermostat

a. Removal.

(1) Raise the driver's seat and remove the

side panels.

(2) Drain the radiator.

(3) Remove two capscrews securing the

outlet pipe from the thermostat housing. Remove

thermostat from housing. Refer to figure 4-17.

ME 3930-624.12/4-16

Figure 4-16. Reverse flushing of engine block.

b. Removal.

(1) Raise driver's seat and remove side

panels.

(2) Remove the radiator grille by removing

nuts and lockwashers from studs which attach grille to

truck frame. (para 4-67.)

(3) Drain the radiator by opening the drain

cock (fig. 4-15).

(4) Loosen hose clamps which secure coolant

inlet and outlet hoses to the radiator. Disconnect

transmission oil cooler lines from the fittings in

bottom of the tank of the radiator.

(5) Remove the four capscrews and lock-

washers which attach radiator to truck frame from the

inside of engine compartment.

CAUTION: Do not lose any spacers

that may be present between radiator

and frame mounting .

Figure 4-17. Thermostat location.

(6) Slide bottom of radiator out first through

b. Inspection.

(1) Inspect the thermostat and thermostat

housing for cracks, distortion, scale, dirt deposits, or

other physical damage.

4-23