freightliner 108SD - Awd Range Switch; All Wheel Drive Controls; Awd Operation Switch

All Wheel Drive Controls
All wheel drive (AWD) allows the driver to direct
driveline power to all drive and steer axles.
AWD Operation Switch
The AWD operation switch (LOCKED AWD) is a two-
position rocker switch. See Fig. 5.28.
To engage AWD, press the upper half of the rocker
switch. To disengage AWD, press the lower half of
the switch.
AWD Range Switch
NOTICE
To prevent damage to the transfer case and the
driveline, stop the vehicle and apply the parking
brake before using the range switch.
IMPORTANT: Use this switch only when AWD
has been engaged.
In most cases, the AWD range switch is a two-
position rocker switch with the legend LO RANGE at
the upper end and HIGH RANGE at the lower end.
On vehicles with a power take-off (PTO) unit, the
three-position switch has a neutral (N-TRL) position
in the middle. See
Fig. 5.29.
Use the AWD high range when driving at normal
speeds under off-road conditions or on non-paved
surfaces. Use the low range when extra traction is
needed at lower speeds (i.e., in muddy, snowy, or icy
conditions).
Two-Position Switch (No PTO)
On vehicles without a PTO, high range is considered
standard operation. To activate the low range, press
the upper half of the switch. To switch back to HIGH
RANGE, press the lower half of the switch.
Three-Position Switch (With PTO)
IMPORTANT: Always use the N-TRL range
when operating the PTO.
On vehicles with a PTO, neutral is considered stan-
dard operation (switch in the middle position).
10/31/94
f600369a
1
2
1. Indicator Panel 2. Mode ID
Fig. 5.27, Allison Push Button Shift Selector
08/10/2006
f610807
LOCKED
AWD
Fig. 5.28, AWD Operation Switch
1
f610808
LO
RANGE
HIGH
RANGE
LO
RANGE
HIGH
N−TRL
01/06/2015
2
1. Two-Position Switch
2. Three-Position Switch
Fig. 5.29, AWD Range Switches
Driver Controls
5.11