Piper SARATOGA PA-32-301 Maintenance Manual page 582

CARBON PILE
BENDIX DRIVE.
The Bendix Drive should be wiped clean with a dry cloth. The pinion should turn smoothly in one
direction and should lock in the other direction. Replace drive if it fails to check as above or if the pinion teeth
are excessively worn or damaged.
ASSEMBLY OF STARTING MOTOR.
1. When assembling the starting motor, always use an arbor press and the proper bearing arbor for
installing graphitized bronze and roller bearings. The Bendix shaft should have a thin film of Lubriplate #777
or equivalent on the Bendix portion of the shaft. End play should be .005 to .050 of an inch.
2. New brushes should be properly seated when installing by wrapping a strip of 00 sandpaper around
the commutator (with the sanding side out) 1-1/4 to 1-1/2 times maximum. Drop brushes on sandpaper
covered commutator and turn the armature slowly in the direction of rotation. Dust should be blown out of the
motor after sanding.
- NOTE -
The spring tension is 32 to 40 ounces with new brushes. This tension
is measured with the scale hooked under the brush spring near the
brush and the reading is taken at right angles to the fine of force
exerted by the brush spring.
80-10-12
Page 80-08
Revised:
August 9, 1984
3B3
PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
377
Figure 80-5. No-Load Test Hook-up
Figure 80-6. Stall-Torque Hook-up