Piper Cherokee Six - Page 589

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
10-50.
REMOVAL.
To
remove
the
starting
motor
from
the
engine,
first
dis-
connect
the
ground
cable
from
the
battery
post
to
prevent
short
circuiting.
Dis-
connect
the
lead
from
the
starting
motor
terminal,
then
take
out
the
mounting
bolts.
The
motor
can
then
be
lifted
off
and
taken
to
the
bench
for
overhaul.
10-51.
DISASSEMBLY.
a.
Remove
the
frame
screws
from
the
commutator
end
head
and
pull
end
head
and
armature
from
frame.
Lift
the
brushes
and
lock
in elevated
position
with
brush
springs.
Use
a
puller
to
remove
the
end
head
from
the
armature.
Use
a
special
bearing
puller
to
remove
the
sealed
ball
bearing
from
the
armature
shaft.
b.
Remove
the
frame
screws
that
secure
the
gear
housing
to the
frame.
Re-
move
bolts
and
nuts
holding
the
gear
housing
to the
pinion
housing
and
separate
the
two
units.
Pull
Bendix
shaft
from
pinion
housing.
Do
not
lose
the
steel
spacer
that
is located
on
the
pinion
end
of
the
shaft.
Remove
reduction
gear,
woodruff
key
and
steel
spacer
from
shaft.
c.
Turn
the
Bendix
pinion
until
it locks
in
the
extended
position.
Locate
"spi-
rol"
pin
and
use
a
punch
to remove.
Slide
drive
assembly
off
the
shaft.
Do
not
attempt
to disassemble
the
drive
and
do not
dip
it
in
cleaning
solvent.
d.
To
remove
the
roller
bearings
from
the
gear
housing,
use
an
arbor
press
and
the
correct
bearing
arbor.
DO
NOT
HAMMER
OUT.
Each
part
should
be
cleaned
and
inspected
for
excessive
wear
or damage.
Bearings
should
be
checked
for
proper
clearance
and
evidence
of
roughness
orgalling.
Oil
and
dirt
should
be
removed
from
insulation
and
the
condition
of
the
insulation
checked.
10-52.
BRUSHES.
Check
the
brushes
to
see
that
they
slide
freely
in
their
hold-
ersandmake
full
contact
on
the
commutator.
If worn
to half
their
original
length
or less,
they
should
be
replaced.
10-53.
ARMATURE.
a.
Check
the commutator
for
uneven
wear,
excessive
glazing
or
evidence
of
excessive
arcing.
If
only
slightly
dirty,
glazed
or
discolored,
the
commutator
can
be
cleaned
with
00 or
000
sandpaper.
If the
commutator
is
rough
or
worn,
it
should
be
turned.in
a
lathe.
Refer
to
Figure
10-28.
The
armature
shaft
should
be
inspected
for
rough
bearing
surfaces
and
rough
or damaged
splines.
b.
To test
the
armature
for
grounds,
a
set of
test
probes
connected
in series
with
a 110-volt
light
should
be used.
Touch
one
probe
to a commutator
segment
and
the
other
to the
armature
core.
If
the
test lamp
lights,
the
armature
is
grounded
and
should
be replaced.
c.
To
test
for
shorted
armature
coils,
a growler
is
used.
(Refer
to
Figure
ELECTRICAL
SYSTEM
Issued:
8/17/72
3C13