TM 5-6115-465-12
TO 35C2-3-446-1
NAVFAC P-8-625-12
TM 06858B/06859D-12
(1) Continuity between connector pins A and
Alternator Voltages at Ambient
B and between pins G and H.
Temperature
(2) Discontinuity between pins A and C, be-
DC Voltage
Ambient
tween D and E and between F and J.
Minimum - Maximum
Temperature
d. Installation. Install speed switch in reverse
29.20-30.12
0 (-18)
order of removal procedures.
28.86-29.73
20 (-6.6)
COOLANT TEMPERATURE TRANSMITTER.
28.64-29.36
40 (4.5)
a . Removal.
28.32-28.98
60 (15.5)
NOTE
28.00-28.60
80 (26.6)
Test coolant temperature transmitter in
accordance with paragraph c. below
27.68-28.32
100 (38)
prior to removal. Coolant temperature
transmitter is located on the engine ther-
27.32-28.04
120 (49)
mostat housing.
(1) Refer to paragraph 3-31 and drain coolant
from the radiator.
NOTE
(2) Unscrew the wiring connector from the
temperature transmitter.
Rotating adjusting screw clockwise in-
creases voltage output. Rotating adjust-
(3) Unscrew the temperature transmitter
ing screw counterclockwise decreases
from the thermostat housing.
output .
b.
Cleaning and Inspection.
(11) If proper voltage cannot be obtained with
adjusting screw, replace alternator.
(1) Clean temperature transmitter with filter-
ed compressed air and a soft bristle brush or with a
d. Installation. Install battery charging alter-
clean lint-free cloth lightly moistened with an
nator in reverse order of removal procedures.
approved solvent.
SPEED SWITCH.
(2) Inspect temperature transmitter for
NOTE
cracked casing, corrosion and damaged threads and
connector.
Test speed switch in accordance with
paragraph c. below before removal.
c . Testing.
(1) Disconnect wiring harness connector from
a.
Removal.
coolant temperature transmitter.
(1) Remove wiring harness connector from
(2) Connect an ohmmeter or similar device
speed switch connector (figure 1-2).
between the connector and casing.
(2) Use 1-1/8 inch wrench to loosen and re-
move the speed switch.
(3) Refer to paragraph 2-10 and start the
engine.
b.
Cleaning and Inspection.
(4) Allow the engine to operate while observing
the ohmmeter.
(1) Clean speed switch with filtered compress-
ed air and a soft bristle brush or wipe with a clean,
(5) Resistance should increase to a reading of
lint-free cloth lightly moistened with an approved
680 to 745 ohms when the engine reaches normal
solvent.
operating temperature.
(2) Inspect speed switch for cracked casing,
(6) Refer to paragraph 2-11 and stop the
corrosion, bent or broken connector pins and
engine.
stripped or damaged threads.
c. Testing. Replace the speed switch, if any
of the following continuity or discontinuity y checks
(7) Replace coolant temperature transmitter if
are not verified.
resistance is not within specified limits.
