Meritor MM-0170 Maintenance Manual page 77

NOTE: As the truck hub unit warms up during operation, some
small amounts of grease will purge out the OUTBOARD dust seal
as pressure is released from inside the truck hub unit. The grease
purge is permissible if it does not exceed two grams or about one-
half teaspoon. Do not replace the truck hub unit if the grease purge
does not exceed two grams.
4. Attach the magnetic base of a dial indicator stand to the
end of the spindle. Touch the indicator stem against the
face of the wheel pilot of the truck hub unit.
5. Set the dial indicator on ZERO.
6. Slightly rotate the truck hub unit in both directions while
pushing INWARD until the dial indicator doesn't change.
Repeat this step while pulling OUTWARD. The difference
between the two readings is the end play.
If the end play is 0.0-inch: This reading is approved for
the truck hub unit. Do not replace the unit if you obtain this
reading.
If the end play is greater than 0.003-inch (0.076 mm):
Recheck the torque on the inner wheel bearing nut as
specified in Section 9 Adjustment on page 57.
7. Repeat Step 4. Record measurements greater than
0.003-inch (0.076 mm) and less than 0.009-inch
(0.229 mm) in a maintenance log.
8. Check that the truck hub unit rotates smoothly.
If the end play reaches 0.009-inch (0.229 mm) or the
truck hub unit is very rough or noisy while rotating:
Replace the truck hub unit.
Tie Rod Ends
1. Park the vehicle on a level surface with the front wheels in
the straight-ahead position.
2. Place blocks under the rear wheels to prevent the vehicle
from moving.
3. Remove dirt and grease from the tie rod end seals.
4. Place the dial indicator base on the BOTTOM of the tie rod
arm.
5. Place the indicator tip near the tie rod end grease fitting.
Figure 11.10. Set the dial indicator on ZERO.
(16579)
Printed in USA
11
UP
DOWN
Figure 11.10
Check the tie rod end play by hand. Do not use a pry bar which
can affect the accuracy of the dial indicator reading. Damage to
components can result.
6. Move the tie rod and cross tube assembly UP and DOWN
by hand. Record the dial indicator reading.
If the dial indicates a reading of more than 0.060-inch
(1.52 mm): Replace the tie rod end.
7. Place the dial indicator on the tie rod end assembly at the
opposite side of vehicle. Repeat Step 1 through Step 6.
Inspect the Tie Rod Assembly for Movement
NOTE: Do not grease the tie rod assembly before you perform the
inspection.
1. Park the vehicle on a level surface. Place blocks under the
rear wheels to prevent the vehicle from moving.
2. Raise the front end of the vehicle off the ground. Support
the vehicle with safety stands.
3. With the engine off, turn wheels from full left to full right,
and then return to the straight-ahead position. This step will
require more force for vehicles with the power steering off.
NOTE: The boot may be missing completely or may not completely
cover the ball joint.
4. Check that the boot is in place and completely installed
over the tie rod end.
5. Check for cracking or tears in the boot. Also check the boot
seals for damage. Replace the entire tie rod end if the boot
is damaged or missing. Figure 11.11.
Copyright Meritor, Inc., 2023
Lubrication and Maintenance
TIE ROD
END
CAUTION
1000326c
MM-0170 / Revised 03-23
Page 73