completed the shift into the low range. Some ve-
hicle motion is needed to ensure engagement of
the axle.
Meritor Drive Axles with Main
Differential Lock
The Meritor main differential lock is a driver-controlled
traction device operated from the vehicle cab. See
Fig. 6.2. A rocker switch allows the driver to lock or un-
lock the differential. An indicator light in the switch
comes on when the differential lock is engaged.
The main differential lock provides maximum traction
under slippery conditions. When the differential lock is
engaged, the clutch collar completely locks the differen-
tial case, gearing, and axle shafts together, maximizing
traction of both wheels and protecting against spinout.
Under normal traction conditions, do not engage the
differential lock.
Operate the axle with differential action between both
wheels.
Meritor Main Differential Lock
Operation
To lock the main differential and obtain maximum trac-
tion under slippery conditions, depress the control
switch.
WARNING
Lock the main differential only when the vehicle is
standing still or moving less than 25 mph (40 km/h).
Never lock the main differential when the vehicle is
traveling down steep grades or when the wheels are
slipping. This could damage the differential or lead
to loss of vehicle control, causing personal injury
and property damage.
If the vehicle is moving, maintain a constant vehicle
speed while engaging the differential lock. Briefly let up
f601427a
10/02/98
Fig. 6.2, Differential Lock Switch
Clutches, Rear Axles, and Steering
6.4
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