
Brush holder - renewal
Always renew the complete unit if the regulator fails or brush-
es are worn or protrude from the holder to less than 5 mm.
In case of pre-1996 alternators, force the brush holder out of
the voltage regulator housing by pressing the terminal «Ç». Avoid
damaging the brushes, so remove and refit the regulator with the
brush holder as described earlier in sections «Alternator - dis-
mantling» and «Alternator - reassembly».
In case of 1996-on alternators with one-piece regulator/brush
holder unit, renew the complete brush regulator/holder assembly.
Before refitting the voltage regulator with new brush holder,
blow its locating place in the alternator clean from carbon dust
and wipe off any oil contamination.
Rotor bearings - renewal
To remove a failed bearing from the drive-end housing, undo
the nuts of screws holding the bearing retaining washers, remove
the washers and screws, then press out the bearing on a hand
press. Should the screw nuts fail to undo (the screw ends are
bent-up), cut off the screw ends.
Refit the new bearing to the alternator housing only when the
bore for the bearing is not deformed and its diameter is not over
42 mm. If the bore is bigger or deformed, renew the housing.
Using a press, drive in the bearing, then compress the bear-
ing between two washers, held by the screws and nuts. Tighten
the nuts and bend-up the screw ends. The slip ring rotor bearing
is renewed together with the housing, since when the bearing is
damaged, the recess in the housing is damaged too. The bearing
is removed from the rotor using a puller; use a press tool to drive
it into position.
Supplementary diodes - renewal
To replace a damaged diode, unsolder its pins, then careful-
ly take the diode out from the plastic holder, taking care not to hit
the diode plate. Clean the holder from epoxy, fit a new diode and
solder it.
The colour-coded diode terminal must be re-soldered to the
common output wire. After soldering, secure the diode to the
holder with epoxy.
Starter motor
Specification
Maximum power, kW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3
Amperage at maximum power, not greater
. . . . . . . . .290±10
Amperage at ‘brake-on’, not greater
. . . . . . . . . . . . . . . . . 550
Amperage at idle without solenoid, not greater
. . . . . . . . . . .60
General description
The starter motor is of pre-engaged type (35.3708 model),
DC, with field coils, incorporating a double-winding solenoid.
Body 17 (Fig.7-13) houses four poles 18 with field windings,
three of which are series and one is parallel. Covers 7 and 15 and
starter housing 17 are held together by two bolts. The armature
features a face-type commutator. The armature shaft runs in sin-
tered shells 14, press fitted to cover 6 and 15.
The starter motor wiring diagram is shown in Fig.7-14. When
the starter motor is switched on, the battery voltage is supplied
through supplementary relay 4 (113.3747-10 model) to both sole-
noid windings (plunging winding II and holding winding I). The
plunging winding shuts off when the solenoid contacts close.
Fault diagnosis
Cause
Remedy
At starter motor switch-on, armature fails to rotate,
solenoid inoperative
1. Battery defective or fully dis-
charged
2. Battery terminal posts and lead
ends severely corroded; end loose
3. Solenoid faulty internally, earth-
ed or broken
4. Starter motor relay defective
5. Starter relay winding power cir-
cuit open
6. Ignition switch contacts 30 and
50 fail to close
7. Starter solenoid power leads
broken
8. Stuck starter solenoid
No or slow armature rotation, solenoid inoperative
1. Battery defective or fully dis-
charged
2. Battery posts and lead clamps
severely corroded; ends loose
3. Loose end of cable from power
plant to body or between power
plant to battery «minus» post
4. Solenoid terminal bolts oxidized
or terminal bolt wire end retaining
nuts loose
5. Commutator burnt, brushes
sticking or worn
6. Stator winding or armature bro-
ken or shorted
7. Positive brush holder earthed
146
1. Renew or charge battery
2. Clean battery posts and wire
ends, tighten and apply a coat of
petroleum jelly
3. Tighten cable end fasteners
4. Clean terminal bolts, tighten lead
retaining nuts
5. Clean commutator, renew brush-
es
6. Renew stator or armature
7. Eliminate shock-circuit or renew
commutator end cover
1. Charge or renew battery
2. Clean battery posts and lead
ends, tighten and apply a coat of
petroleum jelly (Vaseline)
3. Renew solenoid
4. Clean relay contacts. Renew
faulty relay
5. Check wires and connections
between ignition switch terminal 50
and relay terminal 86
6. Renew ignition switch contact
unit
7. Check leads and connections:
battery - starter cut-in relay -
starter solenoid terminal 50
8. Remove solenoid, check arma-
ture for smooth slide
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