Piper Cherokee Six Service Manual page 591

PIPER CHEROKEE SIX SERVICE MANUAL
ings for excessive wear.
Remove rust, paint or grease
from mounting surfaces.
10-57. 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 di-
rection.
Replace drive if it fails to check as above or if the pinion teeth are ex-
cessively worn or damaged.
10-58. ASSEMBLY.
a. 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.
b. 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 directionof
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 line of force exerted by the brush spring.
377
c. Check the position of the pinion to
be sure the unit willmesh
properlywith
the flywheel ring gear.
See specifica-
SWITCH
ti ETE
tions for unit for correct dimensions.
N PLL Refer to paragraph 10-61.
10-59.
BENCH TESTS.
a. After the starting
motor is reas-
BT
TY TTER
sembled,
it should be tested to see that
R TACETEOMER
the no-load current
at a certain voltage
STATINING
OTOT
is
within specifications as given in para -
graph 10-61.
To make this test, con-
Figure 10-31. No-Load
nect as shown in Figure
10-31. If cur-
Test Hook-up
rent is too high, check the bearing a-
ELECTRICAL
SYSTEM
Revised: 6/18/76
3C15