Engine Fan Switch, Optional
The engine cooling fan can be turned on by the en-
gine fan switch (ENG FAN legend). The fan will con-
tinue to operate for a set amount of time and then
turn off unless the coolant temperature is high
enough to continue the fan operation.
To turn the engine fan on, press on the upper part of
the rocker (at the fan icon). See
When the engine fan is running, the fan blade icon is
backlit in amber. When the panel lights are on, the
ENG FAN legend is backlit in green.
Transmission Controls
If so equipped, the transmission range control valve
and splitter valve are attached to the gearshift knob.
Transmission shift pattern labels are located inside
the cab. See
for complete transmission
operating instructions.
On vehicles with standard Allison On-Highway Series
automatic transmission, the shift selector is lever-
activated. The display mounted on the steering col-
umn provides four forward ranges and one reverse
range. See
When the transmission is in D (drive), the vehicle will
operate in the overdrive (5th) gear. To shift down into
the direct drive (4th) gear, use the overdrive lockout
switch (O/D legend). See
. The transmission
will shift into 4th gear and remain in that gear unless
a range inhibitor is active, such as engine overspeed.
See
for more information about range
inhibitors.
f610589a
03/31/2009
Fig. 4.20, Exhaust Brake Switch
f610590
01/04/2011
Fig. 4.21, Engine Fan Switch
01/22/2003
1
2
3
f270119
1.
All Series, Standard (without park)
2.
1000/2400 Series, Optional (with park)
3.
2000 Series, Optional (with auto-apply parking
brake)
Fig. 4.22, Steering Column-Mounted Shift Controls
f610638
01/22/2003
Fig. 4.23, Overdrive Lockout Switch
Controls
4.9
