TP-9781
Issued 4-97
16579/22882
Page 2
© Copyright Meritor Automotive, Inc., 1997
Printed in USA
Installation in Vehicle
The differential lock shift unit
MUST
be connected
correctly to the other vehicle components to
ensure that the axle and the main differential lock
system operate properly. Meritor recommends
connecting the air line from the shift unit
through
the low speed range of the air shifted
transmission
.
Figure 2
.
1.
Connect a fused wire from the power supply
(ignition/battery) to the differential lock
indicator light in the vehicle cab. We
recommend a separate indicator light for each
differential lock-equipped axle of a tandem.
2.
Connect the indicator light to one wire of the
sensor/switch in each of the axle carriers with
the differential lock.
3.
Ground the indicator light circuit(s) by
connecting the second wire of the sensor/
switch to the chassis.
4.
Connect an air line from the control side of the
transmission low range control valve to the
supply side of the driver control plunger. The
plunger must be the type that is held in by air
pressure and automatically releases when the
air pressure is discontinued. Use a Midland
valve KNZ 0031, KNZ 0033 or equivalent.
5.
Connect an air line from the delivery side of
the plunger to the control side of the axle air
control valve.
6.
Connect an air line from the delivery side of
the axle air control valve to the differential lock
actuator on each of the axles with the
differential lock.
7.
Connect an air line from the air supply tank to
the supply side of the air control valve.
8.
Connect an air line from the air supply tank to
the supply side of the transmission low range
control valve.
WARNING
To prevent serious eye injury, always wear
safe eye protection when you perform vehicle
maintenance or service.
WARNING
Do not connect together or combine the control
systems on tandem axles that have both inter-axle
differential locks and main differential locks.
Each locking system
MUST
be capable of being
operated independently of each other. Damage to
components and serious personal injury
can result.
NOTE:
Any other main differential lock installation
procedures
MUST
be approved by Meritor
Heavy Vehicle Systems, LLC, Axle Engineering,
Troy, Michigan.
