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Wiper motor - dismantling, reassembly and
inspection
Commence to dismantle the motor by undoing cover 1 (Fig.7-
35) retaining screws.
Remove the cover complete with plate 2. Next unscrew
cover 16 from motor housing 7 and separate them. Extract arma-
ture 8 from the motor housing.
To remove motor gear 3, undo crank 9 retaining nut, retrieve
the circlip from the spindle and withdraw the spindle complete
with the gear and washers.
On completion blow the inside of the dismantled motor with
compressed air to remove any carbon deposits; always inspect
the brushes and commutator.
The brushes should slide freely without sticking in the brush
holders, the springs should be good and sufficiently tense.
The commutator should be sanded with fine emery paper,
then wiped with a cloth moistened in petroleum jelly.
If the commutator is badly burnt or worn, it is advisable to
renew a complete motor.
Inspect the armature shaft ends for any traces of jamming.
Sand them with fine emery paper, if applicable.
When reassembling, make sure the brushes are well clear off
the commutator to prevent possible edge chipping or damage.
Refit the armature into the motor housing with a particular care,
avoiding hitting the magnets.
On completion, align the bearings by tapping the motor hous-
ing with a wooden mallet, then check the motor on the tester.
Wiper motor specification
Maximum operative drive spindle torque*, N•m (kgf•m) . . . . . .2 (0.2)
Consumption current *
at 1 N•m (0.1 kgf•m), not greater, amps . . . . . . . . . . . . . . . . . . . .2.8
Motor drive spindle speed*
at 1 N•m (0.1 kgf•m), at least, rpm . . . . . . . . . . . . . . . . . . . . . . . . .50
Starting torque of motor drive spindle*,
at least, N•m (kgf•m) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 (1.2)
____________________________
* At 14 volts and ambient temperature of (25±10)°ë, on a cold engine
Fig.7-36. Wiring diagram for headlight wipe/wash:
1 - headlight wipers; 2 - headlight washer motor; 3 - headlight wipe/wash relay; 4 - complementary fusebox; 5 - headlight beam switch; 6 - external light switch; 7 - wind-
screen washer and headlight wipe/wash switch; 8 - fusebox; 9 - ignition switch
Windscreen wiper relay
The relay of êë-514 model is used for intermittent operation
of the windscreen wiper. The relay is located beneath the instru-
ment panel on the left-hand side and is attached to the body by
means of two screws.
The relay must ensure 9 to 17 wiper cycles per minute at sup-
ply voltage of 10 volts and ambient temperatures of -20 to +50°ë.
The resistance of the electromagnet winding is (66±2) Ohm,
while the breaker winding resistance is (23±1) éhm.
When the wiper is activated for an intermittent operation
(while the breaker bimetal plate is not warm enough), the wiper
blades can make up to 4 continuous double sweeps.
Headlight wipe/wash
The headlight wipe/wash includes two (right-hand and left-
hand) motors, arms and blades. The wiper arms and blades park
at the bottom position. The motor unit is fitted with a thermal
bimetal fuse for overload protection or 8 amps fuse in the motor
yellow-black wire.
The headlight wipe motor unit is built as a complete unit,
therefore it is not serviceable and is subject to renewal in case of
failure.
The headlight washer pump motor is the same as that for the
windscreen washer.
The wiring diagram for wipe/wash operation is shown in
Fig.7-36. The headlight wipe/wash system is operated only with
the headlights on by steering column lever 7, i.e. simultaneously
with activation of the windscreen wipe/wash. Voltage is supplied
to supplementary relay 3 winding, activating the relay. When the
terminal «30» is powered through the exterior light switch (i.e. the
headlights are on), voltage is supplied through the closed relay
contacts to headlamp wipers 1 and to headlamp washer motor 2.
The headlamp wiper should operate at 45-60 rpm (double
sweeps) at a load of 0.49 N•m (0.05 kgf•m), supply voltage of 12
volts, ambient temperature of (25±10)°ë and maximum consump-
tion current of 1.5 amperes.
161
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