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Driver Instructions
Locking the DCDL
When encountering poor road or highway conditions where
maximum traction is needed, follow the recommended procedures:
1.
Without the wheels spinning, slipping or losing traction, flip the
DCDL control switch to the "LOCK" position while maintaining a
constant vehicle speed under 25 mph.
NOTE: The DCDL system of some vehicles is connected through the
low speed range of the transmission. If this type of differential lock
system is used, the transmission MUST be operating in the low
speed range to allow the differential
to lock.
2.
Let up momentarily on the accelerator to relieve torque on the
gearing, allowing the DCDL to lock.
3.
When the DCDL is activated, the indicator light will be on and
there may also be an
audible signal.
4.
When the DCDL is fully locked, the vehicle will have an
"understeer" condition when making turns. Proceed cautiously
over poor road or highway conditions, NEVER exceed 25 mph,
and use good driving judgment.
Meritor Heavy Vehicle Systems, LLC
2135 West Maple Road
Troy, MI 48084 U.S.A.
866-OnTrac1 (668-7221)
meritor.com
Information contained in this publication was in effect at the time the publication was approved for printing and is subject to
change without notice or liability. Meritor Heavy Vehicle Systems, LLC, reserves the right to revise the information presented or
to discontinue the production of parts described at any time.
© Copyright 2018
Meritor, Inc.
All Rights Reserved
Unlocking the DCDL
When the vehicle can safely operate at speeds above 25 mph and
driving conditions have improved, disengage the DCDL following the
recommended procedures:
1.
Flip the control switch to the "UNLOCK" position, when the
vehicle is stopped or when traveling below 25 mph while the
wheels are not spinning, slipping or losing traction.
2.
Let up momentarily on the accelerator to relieve torque on the
gearing, allowing the DCDL to unlock. It may take up to
1/2 mile of driving before the differential unlocks.
NOTE: If the DCDL system is connected through the low speed
range of the transmission, shifting out of low speed range will also
unlock the differential.
NOTE: Be aware that it is possible for the assembly to become
torque bound if the condition requiring differentiation is not relieved
prior to moving the switch to the OFF position. In a torque-bound
condition, the light will continue to illuminate, indicating the lock is
still engaged. Typically, it will disengage during normal
maneuvering. Under some conditions, however, stopping and
shifting to Neutral will relieve the torque-bound condition and allow
disengagement.
3.
When the DCDL is deactivated, the indicator light will be off or
the audible signal will stop.
4.
Resume driving at normal speed using good driving judgment.
Printed in the USA
TP-9646
Revised 11-18
(16579)
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