TM-9-2320-279-20-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3

TM-9-2320-279-20-1 - Page 867 of 985

TM 9-2320-279-20-1

Electrical System Maintenance Instructions (Cont)

7-78. WATER TEMPERATURE SENDING UNIT AND ALARMSTAT REMOVAL/INSTALLATION

(CONT).

a. Removal.

NOTE

●

Water temperature sending unit and alarmstat are removed and installed in

same way.

●

Water temperature sending unit shown.

(1)

Remove nut (1), lockwasher (2), washer (3), wire (4), and insulator (5) from sending unit (6).

(2)

Remove sending unit (6) from thermostat housing (7).

b. Installation.

WARNIN G

Adhesives, solvents, and sealing compounds can burn easily, can give off harmful

vapors, and are harmful to skin and clothing. To avoid injury or death, keep away

from open fire and use in well-ventilated area. If adhesive, solvent, or sealing

compound gets on skin or clothing, wash immediately with soap and water.

(1)

Coat threads of sending unit (6) with pipe thread sealing compound, leaving last two threads

bare.

(2)

Install sending unit (6) in thermostat housing (7).

(3)

Install insulator (5), wire (4), washer (3), lockwasher (2), and nut (1) on sending unit (6) and

tighten to not more than 20 lb-in. (2.26 N·m).

c. Follow-on Maintenance.

(1)

Fill cooling system (para 6-2).

(2)

Connect batteries (para 7-91).

(3)

Start and warm up engine, check operation of water temperature sending unit and alarmstat,

and check for leaks (TM 9-2320-279-10).

(4)

Shut off engine (TM 9-2320-279-10).

(5)

Install engine side panel (TM 9-2320-279-10).

(6)

Close engine cover (TM 9-2320-279-10).

END OF TASK

7-289