DASH- AND DOOR-MOUNTED FEATURES CONTROLS AND DISPLAY
– 60 – Y53-6033
Regional Haul (R05/10)
Jacobs Engine Brake or Cummins “C” Brake
Switch
The ON/OFF switch turns the system ON or OFF. The
second switch performs the progressive braking function
that controls the amount of retarding.
• If you have the two-mode system, you can select
HIGH or LOW.
• If you have the three-mode system, you can select
low, medium, or high retarding.
WARNING! Do not use the Jacob’s brake as
the primary means of slowing or stopping the
vehicle. The Jacob’s brake is designed to be
used in conjunction with the service brakes.
Failure to do this may cause death or per-
sonal injury.
Interaxle Differential Lock Switch
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 UNLOCK the differential. The guard over this switch
prevents you from accidentally activating the lock.
2-Mode and 3-Mode Systems
