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Fig. 3-31.
Removing the
lock
washer
VO LVO
10
1
088
10. Remove the
screw
on which
the engaging arm
is
carried.
11. Lift the
rotor
with
pinion and arm out of the drive
end shie ld.
12.
Knock
back the
stop
washer
and remove
the
clr-
clip on the
rotor
~haft.
13. Remove the stop washe-r and puU off the
starter
pinion.
INSPECTING
Examine
the
rotor
for mechanical
damag'
e such
as
a bent or worn
shaft, scored
commutator and dam-
aged windings.
If the rotor shaft is bent or worn, the rotor
should
be
replaced
.
If the commutator is scored or unevenly worn, it
should
be turned. The commutator
diameter
must not
be less than 33 mm
(1.3").
Fig. 3-32.
Removing adjusting washers
VOLVO
101087
VO
L
VO
103302
Fig.
3·33.
Starter motor with bearing shield removed
The commutator shou ld
be
checked
with
a dial
gauge
after turning
.
A
radial
throw
of .08 mm (.003")
can
be considered
permissible.
The
insulation between the
laminntion
s
should be milled down to
.4
mm
(.016")
below the surface of
the laminations,
see Figs. 3-38
and
3-39. This
work is
carried
out in
a special ap-
paratus, or if
such
is not
availabl'
e ,
with
a ground
-
off hacksaw
blade.
Examine
the rotor for shorting by placing it in a
growler machine.
Switch
on and hold
a
hacksaw
blade a few .mm from
the
rotor,
see Fig. 3-40.
If the
blade vibrates in any position when the rotor is
rotated, one of the following faults can be the reason
:
Shorting through the rotor frame,
shorting
in the
commutator or between the windings.
Fig
.
3-34.
Starter motor with brush bridge removed
1.
Steel washer
2
.
Fibre washer
2
VOLVO
103303
3 :15
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