Picture 9. 4WD control
Picture 10. Differential lock control.
423
Model Code Page
35. Autocontrol IV
1. 1. 1994
6600E
8100E-- 8750E
351 5
3. Functional check
A. 4WD
--- Start the engine (tractor stationary and brake pedals are
nor depressed)
--- Depress the rear edge of the 4WD rocking switch
--- The 4WD should be disengaged and the ind. light does
not light.
--- Depress the latched together brake pedals at which time
the 4WD engages and the ind. light comes on.
--- Release the brake pedals and the ind. light goes out.
--- Turn the rocking switch to the middle position and the
4WD engages and the ind. light comes on. Depressing
the brake pedals must not affect the 4WD.
--- Depress the front edge of the 4WD rocking switch and the
ind.lightmustgoout.
--- Depress the latched together brake pedals and the ind.
light should come on. Release the brakes and the ind light
must go out.
--- Engage a gear and release clutch pedal rapidly, at which
time the 4WD ind light should come on.
--- Depress the clutch pedal (wheels stop). After 6 seconds
the 4WD must be disengaged (ind. light goes out).
Note! When the 4WD is disengaged, the 4WD solenoid is
energised and is magnetic which can be verified e.g. with a
screwdriver. Check the engagement of the 4WD by driving at
a speed of 4 kph and by turning the front wheels to max steer-
ing lock. When the 4WD is engaged, you can see that the front
wheels slip (brake) and you feel a jerk when the 4WD
engages.
B. Differential lock
--- Start the engine (tractor stationary and brake pedals are
nor depressed). Disengage the 4WD.
--- Depress the diff. lock rocking switch rear edge at which
time the lock must be disengaged and the ind. light must
not light. Depressing the brake pedals must not engage
the lock.
--- Turn the rocking switch to the middle position and the lock
should be engaged and the ind. light comes on.
--- Depress the brake pedal/pedals and the lock disengages
during braking and the ind. light goes out.
--- Release the brake pedal/pedals and the lock must
engage and the ind. light comes on.
--- Depress the rocking switch front edge at which time the
lock ind. light must go out.
--- Remove fuse F27 (brake switches). Unlatch the brake
pedals.
--- Drive the tractor and brake one rear wheel at which time
the lock engages and the ind. light comes on.
--- While the ind light lights, turn the front wheels more than
±15˚ at which time the lock disengages and the ind light
goes out.
--- Turn the wheels straight ahead and the lock must engage.
--- Stop the tractor at which time the lock disengages.
Note! When the lock is engaged, the solenoid valve is ener-
gised and it is magnetic. Drive the tractor at a speed of about
4 kph. Turn the front wheels to the full steering lock. Engage
and disengage the lock. You can see that the rear wheels slip
(brakes) when the lock is engaged and you also feel a jerk
when the lock engages. In the same way functions the poss-
ible front axle lock (4WD must be disengaged)
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