BRUSH
IN
SPECTION
Remove
the
starter
motor
case screws.
In
spect the brushes and measure the brush length,
Measure brush spring tension with a spring scale.
SERVICE LIMITS:
Brum
length:
Brush spring tension:
6.5
mm
(0.26 i
n)
545
9 /19.2 oz)
COMMUTATOR INSPECTION
Remo
ve
the
starter
motor
case.
NOTE :
Record the location
and
number
of
thrust
washers.
Inspect
the
commutator
bars for discoloration. Bars
discolored in pairs indicate grounded
armature
coil
s.
NOTE:
Do
not
use
emery or
sand
paper
on
the com·
mutator
.
Check
for
continu
ity
between pairs
of
com
mutator
bars. Also, make a resistance check
between
in
-
dividual
commutator
bars and the armature shaft.
There should be no
continuity
.
BRUSH
LENGTH.
BRUSH S
P'''NG
CONTINUITY BETWEEN
COMMUTATOR BAR PAIRS: NORMAL
NO
CONTIN
UI
TY
BETW
EEN
ELECTRIC STARTER
COMMUTATOR BARS AND ARMATURE SHAFT: NORMAL
20-3