Kenworth T410, Driver'S Handbook Manual

Page: 207 / 418

CAT: 8612 November 2019 Page 181
OPERATING INSTRUCTIONS
OPERATING THE REAR/DRIVE AXLE
This section covers the operation of your rear/drive axle. These
instructions apply to the most common features of drive axles. Refer to
the manufacturer’s instructions for further information on the operation of
your axle.
DRIVER CONTROLLED DIFFERENTIAL LOCK (DCDL)
When to use the Cross Wheel Differential Lock (can be on Rear/Rear Axle
or both Rear Axles)
In the LOCK position, an air-operated clutch positively locks both wheel
ends on an axle together, providing greater traction on slippery road
surfaces. However, steering around corners and on normal road surfaces
is more difficult. Continuous operation on a paved, dry surface stresses
the tandem axles, possibly causing internal damage. Only use this feature
when driving on surfaces with poor traction, such as heavy mud or loose
gravel. Do not use it when going downhill or at speeds greater than 40km.
Lock the differential when you encounter dirt roads, loose sand, mud, or
other off-road conditions.
Do not put the differential lock in the LOCK position while the wheels
are spinning freely (slipping). You could lose control of the vehicle
causing an accident or injury to yourself and/or others. Switch to
LOCK only when the wheels are not spinning.
• Look ahead for wet, muddy or icy patches on the road. Stop your
vehicle and switch to LOCK ahead of time.
Do not operate the vehicle under normal road conditions with the
cross wheel differential locked, as this could lead to an accident.
On dry pavement steerability will be reduced with the differential
locked. Lock the differential only when operating on surfaces with
poor traction, such as wet, slippery roads or loose gravel.
Do not use the cross wheel differential lock during downhill operation
or at speeds above 40km. When it is engaged under these conditions,
your vehicle will exhibit ‘understeer’ handling characteristics. This
‘understeer’ condition will cause your vehicle to not turn as quickly,
and more steering effort will be required, which may cause an
accident.