TRUCK SERVICE MANUAL
AXLE-REAR
REASSEMBLE AND INSTALL HYPOID
PINION AND QUILL, BEARING
AND HOUSING ASSEMBLY
E. Measure pinion bearing preload torque while in press
under 9 tons pressure. Wrap strong cord around
housing pilot and pull on horizontal line with a pound
scale. If a press is not available, the pinion bearing
A. Press pinion bearing tapered cups firmly in place
nut may be tightened to the torque noted in
against housing shoulder. Assemble rear bearing
"Tabulation of Torque Limits" (back of Manual) and
inner race inner snap ring. Coat quill O.D. and race
preload torque checked.
I.D. with heavy grease such as Rockwell Standard
Spec. 0-616A and press inner race in place. Install
The preloae torque specification for tapered
outer snap ring.
roller bearings mounted close together in the bearing
cage is 5 to 15 pound inches (new and serviceable
Begin the assembly operation in the press,
used bearings).
making sure the parts are properly aligned. Press the
parts together about 1/4" to 3/8': then relieve the
Example: Assume the housing pilot diameter is
pressure to permit them to realign themselves to
6': the radius is 3" and with 3 pounds pull on the
prevent distortion and damage. Continue the pressing
scale, preload torque is 9 pound inches.
operation until the parts are correctly assembled
Read rotating pounds pull on scale, not starting
B. Lubricate all bearing journals only with a few drops of
pounds pull. If rotating torque is not within 5 to 15
engine oil and firmly press inner bearing on pinion
pound inches, use a thinner spacer to increase or a
and quill assembly.
thicker spacer to decrease preload torque.
C. Install original spacer on inner bearing. O.D. chamfer
of spacer must be toward outer (forward) bearing.
D.
housing and cup assembly on pinion. Press bearing
F. Assemble bearing adjusting nut onto pinion and
firmly against selective spacer with suitable sleeve, rotating
tighten nut to specified torque. Recheck bearing
housing assembly to assure normal bearing contact.
preload. Install , nut lock, flat washer and lock(jam)
nut.
Bend
flat
washer
over
nut
flat.
38
