Front drive engaged - Lever forwards
(downwards).
Front drive disengaged - Lever back
(upwards).
Operation
39
Fig. 16
4WD front drive
The purpose of the front drive is to increase traction on
broken ground, mud and slippery surfaces, etc. The
control lever (A Fig. 16) is used to engage and disen-
gage the front drive. Both manoeuvres can be carried
out whilst the tractor is driving in a straight line and
never under stress.
NOTE:
only use four-wheel drive when strictly neces-
sary. Avoid use of 4WD when maximum traction is not
required, e.g.on hard ground, roads. etc., since this
would only increase tyre wear unnecessarily. Always
leave the 4WD lever engaged when parking on slopes
with the trailer connected.
Fig. A
- Steering stop preset for a 40° steering angle
Fig. B
- Steering stop preset for a 50° steering angle.
Cannot be used with the axle set for a minimum
track width.
1. Steering stop;
2. Spacer;
3. Spring pin.
Fig. 17
Adjusting the steering angle
The maximum steering angle of the 4WD front axle can
be varied by regulating the stop pin on the reduction
gear to obtain a maximum steering angle of 40° or 50°.
The adjustments are made as indicated in the diagram.
4WD front axle with Hydrolock differential lock
On some tractor models, the front axle can be
equipped with the Hydrolock differential lock. The
front differential lock automatically engages when the
rear differential lock pedal is depressed. Depress one or
both brake pedals to disengage it.
Differential lock (Rear)
The rear axle differential is equipped with a locking
device to engage when one of the rear wheels slips
owing to lack of grip. To lock the differential, slow the
tractor down and fully depress the pedal (D) (Fig. 15).
NOTE:
for the best results, engage the diff lock before
the wheels are likely to slip. Do not engage the diff lock
while one of the wheels is actually slipping. Do not lock
the differential without having first depressed the clutch
pedal.
The differential must remain locked until the driving
wheels regain their grip. To disengage the lock, just
remove your foot from the pedal (D). If the differential
fails to release, sharply brake on of the wheels. Brake
the wheel that is out of the furrow during ploughing
work.
Fig. 15