Differential Locks - Volvo FM Handbook

Differential locks

Engage the differential lock just before reaching the
slippery surface and disengage it once you have past
the slippery surface.
None of the wheels may be spinning before the
differential lock is engaged!
1 Make sure none of the wheels are spinning
2 Depress the clutch pedal
3 Engage the differential lock between the rear axles.
The control lamp on the instrument panel will come
on.
Driving 143
Warning!
Drive carefully once the
differential lock is engaged.
Never turn corners on firm
ground with the differential lock
engaged.
First position, differential lock in
transfer gearbox engaged. The lamp
on the instrument panel will come
on.
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