Navistar WorkStar Series, Operator'S Manual

Page: 172 / 258

Operation
Towing Vehicles with Driver Controlled Differential Lock
Removing Axle Shafts Before Towing
CAUTION
To prevent differential and/or transmission
damage, vehicles that must be towed to a service
facility with the drive axle wheels on the ground,
it is necessary to remove the axle shafts before
the vehicle is towed.
CAUTION
Do not use a chisel or wedge to loosen axle shafts
and dowels. The chisel or wedge can damage
hub, axle shafts, and oil seals if used.
NOTE: One of the axle shafts has two sets of splines. One set
to engage with differential side gear and one set to engage with
shift collar for the differential lock. It may be necessary to rotate
shaft slightly to align side gear spline teeth with clutch collar teeth
in order to remove axle shaft.
1. Shift main differential to the locked (engaged) position.
Applicable RR DIFF or FR DIFF ENGAGE indicator must
be illuminated in instrument panel gauge cluster to validate
DIFF LOCK is FULLY engaged and axle shaft can be
removed.
Failure to fully engage axle DIFF LOCK will
allow DIFF LOCK shift collar to fall slightly and block, or
temporarily resist axle shaft reinsertion.
2. Remove cap screws and washers or stud nuts and
washers from flanges of both axle shafts.
3. Loosen tapered dowels in flanges of both axle shafts
by holding a 1-1/2 inch-diameter brass drift or hammer
against axle shaft center and hitting it with a five to six
pound hammer.
4. Remove tapered dowels and both axle shafts from axle
assembly.
5. Assemble a cover over openings of both wheel ends to
prevent loss of lubricant and keep dirt from the wheel
bearing cavities.
Installing Axle Shafts
1. Remove covers from wheel ends.
2. Shift differential lock to the locked (engaged) position.
Applicable RR DIFF or FR DIFF ENGAGE indicator must
be illuminated in the instrument panel gauge cluster to
validate DIFF LOCK is FULLY engaged and axle shaft can
be removed. Failure to fully engage axle DIFF LOCK will
allow DIFF LOCK shift collar to fall slightly and block, or
temporarily resist axle shaft reinsertion.
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