TRUCK SERVICE MANUAL
AXLE-REAR
M. Assemble bearing cage cover, lock washers and
capscrews. Tighten to specified torque.
I. Install original shim pack (which controls gear back
lash) over cross shaft opening in carrier. Apply
colloidal graphite lubricant to cross shaft bearing
journal. Place cage in carrier over shim pack,
carefully aligning oil holes in cage with oil holes in
drive unit. Press bearing cage part way into carrier.
N. Measure cross shaft bearing preload torque. Wrap
strong cord around spur pinion and pull on horizontal
line with pound scale.
The preload torque specification for tapered
roller bearings mounted close together in the bearing
J. Press inner bearing part way onto cross shaft, then
cage is 5 to 15 pound inches (new and serviceable
install outer bearing and cup onto cross shaft. Use a
used bearings).
suitable sleeve and press bearings and cage
completely into carrier.
Example: Assume spur pinion diameter is 4",
the radius is 2'; and with 5 pounds pull on the scale,
K. Assemble bearing retainer plate with 2 capscrews.
preload torque is 10 pound inches.
Tighten capscrews to specified torque and lock with
soft iron wire.
Read rotating pounds pull, not starting pounds
pull.
If preload torque is not within 5 to 15 pound
inches, add shims between cover and cage to
decrease, or remove shims to increase cross shaft
bearing preload torque.
If the pinion, quill and through shaft assembly was not
disassembled disregard re-assembly section Pagesl8, and 19
and temporarily install the pinion, quill and through shaft into
carrier (Page 19, Item H) for tooth contact and backlash check.
See backlash and tooth contact section, Pages 21 and 22.
L.
Install bearing cage cover original shim pack
Continue re-assembly by installing the shift unit, Page 19. If
(which
controls
tapered
bearing
preload).
the pinion, quill and through shaft assembly was
disassembled, continue with Item "A" Page 18.
37