ARMY TM 9-6115-670-14&P
4-144.1
g. Measure resistance of speed sensor. Resistance should be 750 ohms +/- 250 ohms.
h. At J6 connector, measure voltage while cranking engine. Voltage should read between 8 V and 18
V (0.010 inch (0.254 mm) and 0.030 inch (0.762 mm) tolerance range). If voltage does not read
between 8 V and 18 V, adjust speed sensor as necessary.
i. Secure sensor (3) with sensor securing nut (1).
j. Replace connector J6 (7) to governor speed control (8).
k. Install air deflector (para 4.18.).
REPLACE
a. Remove connector J6 (7) from governor speed control (8).
b. Cut and remove tiedown straps as necessary to remove speed sensor wire (6).
c. Remove sensor (3) securing nut (1) and remove sensor (3) from engine bell housing (5).
d. Screw sensor (3) into engine bell housing (5) making sure that sensor (3) is aligned with crest of
engine flywheel gear tooth (4).
e. Adjust sensor.
f. Secure sensor (3) with sensor securing nut (1).
g. Secure sensor wire (6) with tiedown straps.
h. Install air deflector (para 4.18.).
CAUTION
Take care not to cut wires or other APU components
when removing wire ties.
NOTE
Distance between speed sensor end and flywheel
teeth should be 0.0150 inches.
