ARMY TM 9-6115-604-12
NAVY NAVFAC P 8 633-12
c.
Install. See Figure 4-75.
(1) Install LUBE OIL TEMP gage M2 from front of cabinet C door while assembling bracket from the rear.
(2) Secure with hexagonal nuts and lockwashers provided.
(3) Connect wires and resistor and discard tags
.
4-122. COOLANT TEMP GAGE M3 (10, Figure 2-1). COOLANT TEMP gage M3 indicates engine coolant
temperature.
Dangerous voltage levels may be present at components located within cabinet C.
Observe all applicable safety precautions as outlined In Chapter 1, Section III, of
this manual.
NOTE
Two persons may be required to perform the following procedure:
a.
Test
(1) Set 24 V dc CONTROL POWER CIRCUIT BREAKER CB1 to ON.
(2) Disconnect sender lead from COOLANT TEMP sender MT3 on the left thermostat housing on the engine
block (see Figure 3-3) COOLANT TEMP gage M3 pointer should go to zero.
(3) Short to engine ground the disconnected sender lead from COOLANT TEMP sender MT3 COOLANT TEMP
gage M3 pointer should now deflect full scale upwards.
(4) Set 24 V dc CONTROL POWER CIRCUIT BREAKER CB1 to OFF.
(5) Replace COOLANT TEMP gage M3 if It fails to pass this test. Reinstall disconnected sender lead on
COOLANT TEMP sender MT3 after test.
(6) Check wiring using FO-1, and check sender in accordance with paragraph 4-123 if gage is good.
b.
Remove See Figure 4-75.
(1) Tag and disconnect wiring and resistor from COOLANT TEMP gage M3 (2)
(2) Remove hexagonal nuts and lockwashers at rear of cabinet C door Mounting bracket can be removed and
COOLANT TEMP gage M3 will slide out from front of door.
c.
Install. See Figure 4-75.
(1) Install new COOLANT TEMP gage M3 (2) from front of cabinet C door while assembling bracket from the
rear.
(2) Secure with hexagonal nuts and lockwashers provided.
(3) Connect wires and resistor. Discard tags.
4-123. COOLANT TEMPERATURE SENDER MT3. Coolant temperature sender MT3 senses coolant temperature and
sends a voltage signal to COOLANT TEMP GAGE M3.
a.
Test
Dangerous voltage levels may be present at components located within cabinet C.
Observe all applicable safety precautions as outlined In Chapter 1, Section III, of
this manual.
NOTE
Two persons may be required to perform the following procedure.
4-186
