PART 4: CONTROLS AND DISPLAYS DASH-MOUNTED FEATURES
(R10/06) Y53-6007 – 31 –
The ON/OFF toggle switch turns the system ON or OFF.
• In Caterpillar- and Cummins-powered vehicles
equipped with a Jacobs Engine Brake, a second two-
or three-mode switch is incorporated in the instrument
panel. With this system, you can select either LOW or
HIGH or LOW/MEDIUM/HIGH retarding.
For more information on when and how to use the engine
brake in your vehicle, see the owner’s manual for the
engine brake.
WARNING! Using the engine brake when
operating on surfaces with poor traction
(such as wet or icy, slippery roads or gravel)
could cause loss of control.
Two-Speed Rear Axle (Range) Switch
03030
2
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
“PART 7: STARTING &
OPERATING THE VEHICLE”.
Interaxle Differential Lock Switch
SHIFT AT ANY SPEED EXCEPT
IF A WHEEL IS SPINNING
03029
The interaxle differential allows differential action between
the forward rear and the rear rear driving axles. The inter
-
axle differential lock switch allows the operator to LOCK or
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