9
SECTION 55 -- ELECTRICAL SYSTEM -- CHAPTER 3
603.54.471.00 -- 11 -- 2004
SERVICING
DISASSEMBLY (Op .55 201 54)
Refertofigure9.
1. Place the starter motor in a vice with protected
jaws.
2. Disconnect the biggest braided wire which runs
from the field winding casing to the solenoid.
3. Remove the three screws from the front casing
and remove the solenoid. Note that the plunger
will remain connected to the control lever.
4. Remove solenoid plunger from the control lever
by holding and lifting it at the front in order to
unclip it from the lever.
5. Remove the two nuts from the rear casing and
the two screws which fasten the rear cover and
brush plate to the casing. Remove clamp C and
armature shaft end play spacers, leaving the
brush gear on the commutator. Remove the thin
metal washer on the commutator side of the
armature.
6. At this stage of the procedure, check the brushes
and commutator. Check that the brushes are not
sticking and, if necessary, clean the brushes and
their respective channels with a rag and solvent.
Check the brushes are not worn. If they are worn
and minimum length is less than that shown in
the technical information table, it will be
necessary to change the starter motor.
NOTE: The brushes are not serviced separately.
They are welded to their support and will not be
changed for the whole operating life of the starter
motor.
7. Remove the motor casing from the armature and
thecontrolsidebracket.
8. Remove the control lever knuckle pin from the
control side of the casing.
9. Remove the retaining ring which holds the
control group and the inner plate from the
armature shaft, by first removing the pressure
collar perpendicularly from the retaining ring
support by means of an appropriately sized tube.
Then lever the retaining ring from the groove.
10. Remove armature and control group.
REASSEMBLE
1. To reassemble the starter motor, reverse the
removal procedure.
Before reconnecting, test the armature shaft end
play and test the starter motor without load.
ARMATURE SHAFT END PLAY
1. Place the starter motor in a vice with protected
jaws and connect a dial gauge to the flange on
the control side of the casing. Position the dial
gauge pointer on the end of the armature shaft.
2. Push the armature forward and reset the gauge
to zero. Push the armature back as far as it will
go and note the gauge reading.
3. Readings must fall within the limits specified in
the technical information table. If the value is
higher, check that armature and brush plate are
not worn. Change the worn components, as
necessary, and check end play again.
To Next Page
Loading...
