Service Manual

Page 39
2. If the axle uses wet disc brakes and if a shim is not
installed against axle housing flange face, then apply
a thin uniform coat of adhesive #Q58-grade-226 on
one side of the ring gear shim.
3. Carefully install the (0.8 mm thick) shim with the adhe-
sive side against the axle housing flange face while
guided on the wheel end studs. Apply pressure
around the shim surface to make sure the shim will be
bonded to the entire axle flange diameter surface.
4. Apply a thin coat of grease to the O-ring that will be
assembled to the planetary ring gear face.
(Reference line art in step 1)
5. Install the O-ring into the groove on the face of the
planetary ring gear with care not to twist or damage
the O-ring during installation.
6. Using the lifting strap, carefully lift the pre-assembled
planetary wheel end assembly and slide the assembly
along the (2) wheel end studs that were installed in
the axle housing flange. Remove the (2) M18 safety
bolts, nuts and washers, if installed through spindle
flange and ring gear.
7. Make the final wheel end assembly by turning the
axle input yoke to turn the planetary sun gear so the
sun gear teeth will align with each of the planet pinion
gears.
8.
Verify that O-rings have not fallen out of grooves on
both sides of ring gear.
9. Add medium strength thread locker to the (18) M18
axle housing flange threads. Install the (18) M18 cap-
screw and washers to the axle housing flange/wheel
end assembly. Torque to torque chart value.
NOTE: Thread locker is Not required as these (2)
nuts are lock nuts.
T
orque to torque chart value.
9. Install the (2) nuts and washers on the (2) studs.
Axle Air Leak Test
Place axle in a safe test stand mounted with carrier
input pinion horizontal for this assembly test.
1. Install a pressure gauge that will clearly read up to
140 kPa (1.4 Bars, 20 psi) into the axle housing
breather port (7/16”-20 UNF).
2. Connect an air line with a shut off valve.
3. Apply 55 kPa(0.55 Bars, 8 psi) and lock pressure on.
4. Monitor for air pressure drop maximum allowed is
2.1 kPa (0.3 P.S.I)after 30 seconds. If a greater
drop is noted, the axle assembly must be reviewed
for location of air leak by wetting axle surfaces with
soapy water and looking for expanding bubbles at
an air leak. Once air leak is found and repaired,
this test should be repeated.
5. Open shut off valve, bleed the air from the system,
and remove the pressure gauge, and re-install the
breather, or plug, if a remote breather is fitted.
Axle Spin Test
Place axle in a safe test stand mounted with carrier
input pinion horizontal for this assembly test.
1. Fill the axle with oil to the correct level.
2. Using a compatible input connection on a safely
supported drive motor, connect to the axle input
yoke.
3. Run the axle at ~ 50 RPM at the wheels for 90
seconds in the forward direction.
4. If the axle has the wet brake option, slightly actuate
each of the wet brakes separately to equalize
speed to both wheels.If the axle is less the wet
brake feature, just monitor in forward direction and
reverse direction for items in step #5.
5. Monitor for noises, leaks, signs of overheating,
unbalanced speeds.
6. Repeat for reverse input direction.
7. Drain the axle oil through a screen and observe the
oil screen for any abnormal particles.
NOTE: If this oil is to be disposed, recommend in
accordance with environmentally accepted practices.
8. Remove all (3) magnetic drain plugs and inspect
for abnormal particles.
9. Replace all (3) magnetic drain plugs and tighten per
“Torque Table” in section 6.
Section 4
Assembly
Figure 4.32
SHIM
DOWEL