Axle; Differential Lock - Peterbilt 348 2017 Operator's Manual

AXLE

Differential Lock

The vehicle may be equipped with
switches to lock the either of the rear
axle differentials. Depending on how
the vehicle is specified, a combination
individual switches may be available
that can lock the interaxle driveline
and/or any combination of the forward
rear or rear-rear driving axles.
The interaxle differential switch allows
each axle to turn independently.
In certain situations, engaging the
interaxle differential lock relieves
stress on the rear axles and reduces
tire wear. Engaging this switch will
also provide better traction in slippery
or loose gravel conditions.
(03/17)
In the LOCK position, continuous
operation on paved, dry surfaces, put
stress on the axles, and can possibly
damage the internal gears. The switch
has a guard to prevent accidental
operation of the switch.
Locking the differentials is typically
used during ice or snow conditions
and without tire chains, unpaved roads
that have loose sand, mud or uneven
surfaces. Look ahead and predict
when the differential needs to be
locked. Stop the vehicle and lock the
differentials before approaching.
While using the differential in the
locked position, do not exceed 25 mph
(40 km/h). When disengaging the
differential lock, reduce the throttle to
prevent drivetrain damage.
Y53-6060-1C1
WARNING!
Do not put the differential lock in the
LOCK position while the wheels are
spinning freely (slipping), you could
lose control of the vehicle or cause
axle damage. Switch to LOCK only
when the wheels are not spinning.
Failure to comply may result in
death, personal injury, equipment or
property damage.
AXLE
4
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