Installation And Adjustment Of Strobe Sensor - Piper Navajo Chieftain PA-31-350 Service Manual

416
AFT VIEW
1. TIMING MARK
2. GLOW LAMPS (RED)
3. PHOTO CONDUCTOR
(BLACK)
NAVAJO CHIEFTAIN SERVICE MANUAL
1
FWD.
B B
C C
D D
E E
F F
G G
H H
GOV. COIL
PL1
PL3
Figure 14-48. Strobe Sensor
14-140. INSTALLATION AND ADJUSTMENT OF STROBE SENSOR. (Refer to Figure 14-48.)
a. Attach the strobe sensor to the dual tach drive unit by securing loosely with hex nut.
NOTE
The front of the strobe sensor can be defined by the square hole in
the center of the unit to accept the square end of a tach shaft.
NOTE
Before proceeding any further be certain the magneto switches are
OFF.
b. Turn the engine in the direction of rotation to locate No. 2 piston at T.D.C. on the ignition
stroke. Use the engine timing mark. Rotate the engine an additional 22 teeth on the ring gear beyond the tim-
ing mark.
Revised:
3/11/81
4112
ACCESSORIES AND UTILITIES