Advertisement
REAR AXLE
3-19
Tool C-293 and No. 39 plates, (Fig. 48).
Tool C-293 and No. 40 plates, (Fig. 49).
(23) Remove the pinion rear bearing with puller
CLEANING AND INSPECTION
(1) Clean all parts except the ball bearings with
kerosene, mineral spirits or other similar cleaning
fluids. Clean the housing tubes with a clean cloth by
inserting a stiff wire from the ends of tubes into the
carrier section, #and withdraw the cleaning cloth from
the center outward. Wipe the ball bearings with a
damp cloth.
(2) The two differential bearing cup contact areas
in the carrier should be smooth and flat, without
raised metal either in the contact areas or the edges
of the machined surfaces. The bearing caps should
also have undamaged machined surfaces and be free
from raised metal edges along both sides and also
around the bolt holes.
In the drive pinion section of the carrier the bear-
ing cup bores should be smooth and flat. Raised metal
on shoulders of the bores incurred in removing the
cups, should be flattened by use of a flat nose punch.
(3) The axle drive shaft bearing and oil seal bores
at both ends of the housing should be smooth and
free from rust or damage.
(4)
The axle drive shaft splines should be straight
and free from excessive wear. The shaft bearing and
retainer area must be smooth and free from all raised
metal. When it is necessary to clean this portion, re-
move only the raised metal and use crocus cloth to
polish the area
without reducing the diameter
o f
the
shaft.
(5)
If the axle shaft bearings were removed from
the shafts, install new bearings and retaining collars
as these parts are unfit for further use after removal.
(6) Taper roller bearing cone assemblies should
have a smooth, unbroken surface on the cone and
both shoulders. The rollers should also have smooth,
unbroken surfaces. The roller retainer should be free
from damage and cracks. Bearing cups should have a
smooth unbroken surface.
(7)
Differential pinion gears and side gears should
have smooth teeth with a uniform contact pattern,
without excessive wear or broken surfaces. The hub
surfaces of side gears should be smooth and the
splines should be straight and without excessive wear.
The outer surface of the pinion gears should be
smooth and bright. Thrust washers should be smooth
and unbroken.
(8) Inside the differential case, the machined areas
should be polished, without surface imperfections.
The pinion shaft bore in the case should be round and
smooth. Both ends of the pinion shaft should also be
round and without excessive wear.
(9) The drive gear teeth should have a uniform
c - 3
BACKLASH
PITCH
LINE
FACE
FLANK
I
I
OUTWARD
MOVEMLNT
OF
GEAR
'
INWARD
MOVEMENT
OF GEAR
BR205
fig. SO-Gear
Tooth Contact Pattern
contact pattern and have smooth, unbroken surfaces
without excessive wear. The pinion teeth should have
a similar appearance. The machined surfaces of the
pinion shaft and back face of the head should be un-
damaged and without wear. (Figs. 50 and
51).
(10) Use new gaskets and oil seals during assembly.
DIFFERENTIAL ASSEMBLY
If new differential side gears are to be installed,
place a new thrust washer over the hub of each gear
and install in position in the differential case, then
proceed as follows:
Lubricate
All
Parts When Assembling
and Adjusting
side gears and position the gears in the case.
(1) Install the thrust washers on the differential
(2) Place the thrust washers on both pinion gears
DRIVE
CORRECT
ADJUSTMENT
center
PINION SPACER
TOO THICK
Toe.
Low
PINION SPACER
TOO THIN
Ha.1.
High
GEAR TOO CLOSE
TO PINION
Toe
GEAR TOO FAR
FROM PINION
Heal
COAST
m
m
-
Cantar
Toe
Heel. Low
To.. Hlph
-
L T Z S
Slightly
Higher
Slightly
Lovar
1. PINION SPACER CHANGES AFFECT THE COAST SIDE CONTACT
2. BACKLASH ADJUSTMENTS AFFECT THE DRIVE SIDE CONTACT
3.
ALL BACKLASH MEASUREMENTS SHOULD BE MADE AT THE
FASTER THAN THE DRIVE SIDE
MUCH FASTER THAN THE COAST SIDE
POINT OF MINIMUM BACKLASH
NY1022A
Fig.
51-1ooth
Contact Pattern
Hide quick links:
Advertisement
