Differential Lock; Hill Start Assistance - Volvo 9700 US/CAN Driver's Handbook Manual

36 Instruments and Controls

Differential Lock

Differential lock allows drive axle shafts to
be connected together. The wheels then rotate
at the same speed, which makes driving on
slippery surfaces easier.
The differential lock is only to be used on
slippery surfaces. Engage as soon as the bus
is on the slippery surface. It can be coupled
in during driving, at any speed, but will not
actually engage until the bus is travelling at
less than 15 km/h (10 mph).
Do not forget to disengage the differential
lock when you have left the slippery surface!
For more information, see separate driver
instructions "EBS".
CAUTION
The differential lock is only to be used on
slippery surfaces. Other uses may result in
damage to the drive axle.

Hill Start Assistance

This function helps the driver to pull away
on inclines by holding the bus still until the
required torque at the wheels is applied.
This function's mode of operation depends
on whether the bus is equipped with a manual
or automatic transmission. Additional
information, see separate Operating
Instruction "EBS".
3 stage switch for the manual/automatic
coupling of the differential lock.
T0012041
T0012045