Specifications

DASH- AND DOOR-MOUNTED FEATURES CONTROLS AND DISPLAY
– 60 – Y53-6008A
Medium Duty (R05/09)
WARNING! Placing the differential lock in the
“LOCK” position while your wheels are spin-
ning could cause loss of control or axle dam-
age. You could be hurt. Switch to “LOCK”
only when your wheels are not spinning.
See “Interaxle Differential” on page 95 for more informa-
tion on using your interaxle differential.
Two-Speed Rear Axle (Range) Switch
.
If your vehicle is equipped with a two-speed rear axle, you
can select the axle range by the dash mounted switch
shown above. The low range provides maximum torque
for operating off-highway. The high range is a faster ratio
for highway speeds.
For information on how to operate your two-speed rear
axle properly and safely, see “Dual Range (Two Speed)
Axles” on page 97.
Fifth Wheel Lock (Slider Adjustment) Switch
.
WARNING! Do not move the fifth wheel while
the tractor-trailer is in motion. Movement of
the fifth wheel while a tractor-trailer is moving
can cause a serious accident. Your load could
shift suddenly, causing you to lose control of
the vehicle. Never operate the vehicle with the
switch in the unlock position. Always inspect
the fifth wheel after you lock the switch to be
sure the fifth wheel is engaged.
RANGE SELECTOR
FIFTH WHEEL