Fig. 12 - Four wheel drive control system (ma-
chine without SBA System).
Fig. 13 - Single acting cylinder for disengagement
of four wheel drive.
Rear differential lock control cylinder for machines
not equipped with SBA SYSTEM
The rear differential lock is operated by a single acting cylinder;
the release movement is produced by the action of return springs
which expand when the cylinder depressurizes.
To remove the cylinder from its mounting, disconnect the oil fitting
and release the lock nut A.
When refitting the cylinder, check that the circlip B is properly
seated in its groove, then tighten the lock nut fully.
Check also that the lock engages with travel of approximately 12
mm (see fig 14 and fig 15).
Fig. 14 - Rear differential lock control cylinder for machines not equipped
with SBA SYSTEM.
Four wheel drive disengagement cylinder for ma-
chines not equipped with SBA SYSTEM.
Four wheel drive is disengaged through the agency of a single
acting cylinder brought into operation when the function is not
required.
When four wheel drive is selected by pressing the relative button,
the solenoid valve causes oil to exhaust from the hydraulic control
circuit; in this situation, the return spring is able to expand and
apply the coupler.
controls
electro-hydraulic controls
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