Piper SARATOGA PA-32-301 Maintenance Manual page 517

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
241
Figure 74-8. Timing Light Connected to Magneto and Breakers
15. Loosen right main breaker securing screws and position breaker so cam follower is pressed against
cam with points closed. Tighten contact assembly securing screws to prevent contact assembly from bouncing
back when moved. Using a small mallet and drift, tap right breaker in until points just open.
16. Turn rotating magnet back a few degrees: then turn rotating magnet in normal direction of rotation.
Both timing lights should go out within one degree or half the width of "R" mark on rotor. If breakers are not
properly synchronized. reset right breaker.
17. Check right main breaker contact for 0.016 +.004 inch point opening and torque right breaker
contact securing screws to 20-25 inch-pounds. If point opening is out of limits. repeat timing procedure setting
left main breaker opening at .016 + .002 inch. If right contacts open beyond .020 inch. set left contacts closer to
.018 inch. If right contacts open less than .012 inch. set left contacts closer to .014 inch.
18. Using timer light, recheck timing to insure main breaker open within one-half the width of"R" mark
and that retard breaker opens at correct degree setting. Using a wire feeler gauge. check left main breaker for
.016 .002 inch point opening and right main breaker and retard breaker for .016 .004 inch point opening.
- NOTE -
If correct breaker timing cannot be achieved, remove magneto and
have it overhauled.
74-10-04
Page 74-10
2K10
Issued: January 2, 1980
2K1 0