Vaz 21213, Руководство по ремонту, Страница: 151 / 222

To withdraw the actuator unit from the armature, retrieve the
circlip from under stop collar 16. Dismantle the actuator unit after
removing the lockwasher from the clutch hub.
To dismantle the solenoid, undo the clamp bolt nuts and
unsolder the winding leads from terminal 50 and from the end
which is secured at the bottom solenoid terminal bolt.
Once the starter motor has been dismantled, blow its parts
with compressed air and wipe clean.
Components - inspection
Armature. Using a megohmmeter or a 220 v test lamp, check
the armature for the earthed winding. The voltage through the test
lamp is supplied to the commutator segments and armature core.
An illuminated lamp is an indication of a commutator being short-
ed to earth. When using the megohmmeter, the reading should be
at least 10 kOhms. Renew the earthed armature.
Using a specialized device, check for internal faults in the
armature winding and commutator segments, check for loose
connections where the winding wires are soldered to the com-
mutator.
Inspect the commutator. When dirty or burnt, sand it with fine
emery paper. Check the runout between the core and shaft jour-
nal. Renew the armature when the runout is over 0.08 mm.
Check the surfaces of splines and armature shaft journals.
There should be no scuffs, scores or wear. In the event the shaft
surface has yellow marks because of the pinion bush, remove
the marks with the help of fine emery paper, since this can pos-
sibly cause a pinion jam in the shaft.
Actuator unit.
The starter motor actuator unit should operate
over the armature shaft smoothly, without jams. The pinion
should turn on the armature shaft in the direction of the armature
rotation at a maximum torque of 0.27 ç•Ï (2.8 kgf•cm).
The pinion is not supposed to turn in the reverse direction. If
the teeth are scored, regrind them with a small-diameter fine
abrasive disc.
When the drive-associated components are damaged or
badly worn, renew the actuator assembly.
Stator. Using megohmmeter or a 220 v test lamp, check the
stator winding is not earthed.
The test lamp voltage is supplied to the common winding ter-
minal and starter housing. When the bulb is lit up or megohm-
meter resistance reading is below 10 kOhm, or if the windings
have evidence of overheating (blackened insulation), renew the
housing complete with the windings.
Housings. Inspect the housings for cracks. If this is the case,
replace the housings with new ones.
Examine the bushes. When they are worn, renew the com-
plete housings or only the bushes. When the new bushes are
pressed-in, ream them to 12.015+0.03 mm.
Make sure the brush holders are properly secured on the
commutator end housing. The «positive» brush holders must not
be earthed. The brushes should slide smoothly in the holder
slots. Renew the brushes worn to 12 mm in height, but first run
them in to the commutator.
Using the dynamometer, check the spring load at the brush-
es to be 9.8±0.98 N (1±0.1 kgf) for new brushes, renew the
spring, when applicable.
Solenoid. Check the solenoid armature for smooth opera-
tion. Using ohmmeter, check the closing of the solenoid terminal
bolts via a contact plate. When there is no contact, the solenoid
should be dismantled and the terminal bolts to be sanded with
fine emery paper or a superfine flat file.
You may turn the terminal bolts 180°C in case they are badly
damaged at the contact point with the contact plate.
Reassembly
Assemble the starter motor in reversal of the dismantling pro-
cedure. Before reassembly lubricate the armature shaft splines
and freewheel hub, pinion and housing bushes with motor oil.
Lubricate drive guide ring with Litol-24 grease.
Protect the clamp bolt passing under the stator coils with an
insulating plastic tube.
Select shim 10 thickness (Fig.7-16) to ensure maximum
armature axial play of 0.5 mm. On reassembly, bench test the
starter motor.
Ignition system
General description
The ignition system is breakerless. It comprises ignition dis-
tributor 5 (Fig.7-17), spark control module 3, ignition coils 4, spark
plugs 6, ignition switch 1 with relay 2 (113.3747-10 model) and
high-tension (HT) leads. The spark control module monitors the
supply circuit of the ignition coil primary winding. Control pulses to
the control module are generated by the Hall sensor housed in
ignition distributor 6.
149
Fig.7-15. Wiring connections for starter motor testing:
1 - voltmeter with scale limit at least 15 v; 2 - starter motor; 3 - rheostat, 800
amps; 4 - amperemeter shunted to 1000 amps; 5 - switch; 6 - battery