Service Manual

Page 20
• There is damage on the rollers and on the
surfaces of the cup and cone inner race that
touch the rollers. Figure 3.4.
• There is damage on the cup and cone inner race
surfaces that touch the rollers.
Figure 3.5.
• There is any sign of cracks or damage to the
roller cage assembly that retain the individual
taper rollers.
Planetary Wheel End Gearing
CAUTION
The planetary sun gear, planetary gears and ring
gear work together similar to a matched set.
Dama
g
e to the sun g
ear or planet gears can also
damage the planetary ring gear. It is strongly
recommended that when any noted damage to
an
y of these gears might occur, the complete set
in a planetary wheel end should be changed.
• All gears should be inspected for cracks, chipping
of the teeth, scoring, pitch line damage, or heavy
teeth wear.
• The planetary pinion gears should also be checked
for any signs of wear or smoothness damage to the
pinion gear bores.
!
• The planetary ring gear should be checked for signs
of heavy wear, teeth chipping or scoring or deep
scratches around the O-ring groove diameters.
• The planetary sun gear should be checked for any
signs of wear on the gear teeth, scoring, chipping of
gear teeth, signs of wear or burrs on the wet brake
splines on the sun gear, and internal spline wear,
burrs, or other spline damage.
Figure 3.6.
CAUTION
The planetary pinion shafts are not serviceable
items and must not be pressed out of the
planetary spider shaft. Also take care to maintain
the matched set markings on planet pinion shafts
during cleaning process.
Needle Roller Bearings
CAUTION
Any damage to these rollers can damage the
planetary pinion shaft or pinion gear bore. The
needle rollers should also be inspected for end
wear on the individual needle rollers.
All the planetary pinion gears have a “full complement”
of needle roller bearings. Keep (33) needle roller
bearings grouped with their planet gear
.
These needle
rollers should be inspected for roughness, pitting, or
any signs of wear to the individual roller outer
diameter surface.
Planetary Wheel End Thrust
Washers
WARNING
Any wear will cause metallic debris and early
component failures.
The planetary thrust washers should be examined
for any signs of wear on the flat thrust surfaces from
either the needle rollers or the planetary pinions
rubbing against this surface.
!
!
!
1003020a
ETCHING AND PITTING
F
igure 3.4
1003021a
SPALLING AND FLAKING
Figure 3.5
Section 3
Prepare Parts for Assembly
Figure 3.6
SNAP RING
INNER THRUST
WASHER
PLANETARY
PINION GEAR
ROLLERS
OUTER THRUST
WASHER
PLANETARY
PINION SHAFT
PLANETARY SPIDER