Piper Cherokee Six - Page 584

PIPER CHEROKEE
SIX SERVICE MANUAL
A high current indicates grounded
or shorted conductors, and a
low current indi-
cates excessive resistance.
10-41. DISASSEMBLY. If the motor does not perform in accordance with pub-
lished specifications, it may need to be disassembled for further testing of the
components. Normally the cranking motor should be disassembled only so far
as is necessary to make repair or replacement of the defective parts. As a pre-
caution, it
is suggested that safetyglasses bewornwhen
disassembling the crank-
ing
motor. Following aregeneral instructions
for disassembling a typical
Bendix
drive cranking motor:
a. Remove the cover band, if
present, and detach the field coil
leads from the
brush holders.
b. If gear
reduction, remove the drive
housing, and reduction housing.
c. Remove the bolts attaching
the drive housing and commutator
end frame to
the field frame
assembly. Discard the
tang lock washers.
d. Separate the commutator
end frame, armature assembly,
field frame, and
drive housing.
e. Remove and disassemble
the drive from the armature
shaft by first identi-
fying
the type Bendix drive and then
following one of the guides
below:
1. Standard Bendix Drive, remove the head spring screw and slip it off of
the armature shaft.
2. Folo-Thru-Bendix
Drive,
push in the
outer anchor
plate so the
pilot
screw or pin can be removed.
NOTE
Some Folo-Thru Drives use a rubber cushion in place
of
a drive spring. To remove
from shaft, screw
pin-
ion out to drive position,
then force pin
from shaft
through screw sleeve holes.
CAUTION
Do not disassemble
this drive, service is bycomplete
replacement.
10-42. COMPONENT INSPECTION AND REPAIR.
a. Brushes and Brush Holders
- Inspect the brushes for wear.
If they are worn
down to one-half their
original length, when compared
with a new brush, they
should be replaced. Make sure the brush holders are clean and the brushes are
ELECTRICAL SYSTEM
Issued: 8/17/72
3C8