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Yoke Cleaning and Inspection
All current Meritor axles feature helical splines at the yoke
interface. This feature provides a tight fit between the yoke and
input shaft, output shaft and pinion shaft. For the axle to operate
correctly, the input shaft, output shaft and pinion shaft must fit
tightly to the corresponding yoke.
Check for Yoke Wear
DANGER
Park the vehicle on a level surface. Block the wheels to prevent
the vehicle from moving. Support the vehicle with safety stands.
NEVER work under a vehicle supported only by jacks. Jacks can
slip and fall over. Failure to use safety stands can result in death
or serious personal injury and damage to components.
CAUTION
NEVER install a press-on shaft excluder or POSE™ seal after
installing a unitized pinion seal. The use of a POSE seal will
prevent the correct seating of the unitized pinion seal on the
yoke and will result in lubricant leakage at the seal. POSE seal
installation is recommended only for triple-lip and other previous
seal designs.
CAUTION
Do not use a thin metal wear sleeve to refresh the yoke surface.
Wear sleeves pressed onto the yoke will prevent the correct
seating of the pinion seal and damage the pinion seal assembly.
Wear sleeve usage will cause the seal to leak.
1.
Park the vehicle on a level surface. Block the wheels to
prevent the vehicle from moving.
2.
Use a jack to raise the vehicle so that the wheels to be
serviced are off the ground. Support the vehicle with safety
stands.
3.
Remove the driveline.
4.
Remove the input, output or pinion shaft nut.
5.
Clean the ground and polished surface of the yoke journal
using a clean shop towel and a safe cleaning solvent.
NEVER use abrasive cleaners, towels, or scrubbers to clean
the yoke or flange surface. NEVER use gasoline.
6.
Attempt to remove the yoke by hand.
If the yoke can be removed by hand: The yoke is worn.
Replace the yoke.
(16579)
Printed in USA
6
7.
Use a correct yoke puller tool to remove the yoke.
NOTE: The unitized seal features a rubber inner sleeve designed
to seal and rotate with the yoke. This feature allows the yoke to be
reused with minor grooves.
8.
Inspect the yoke seal surface for grooves.
If grooves are found on yoke hubs used with single or
triple-lip seals: Replace the yokes.
If grooves are found on the yoke: Use calipers to
measure the groove diameters. If any groove diameter
measures less than the dimensions shown in Figure 6.11,
replace the yoke.
UNITIZED PINION SEAL (UPS)
Yoke Seal
Diameter
3.000/3.005"
3.250/3.255"
Figure 6.11
Check for a Tight-Fit Condition
Check for a tight-fit condition when installing any serviceable yoke.
1.
Attempt to install the yoke by hand.
If the yoke bottoms out against the adjacent bearing:
Replace the yoke.
2.
Use a correct yoke installation tool to install the yoke.
3.
As the yoke is installed, there should be resistance between
the yoke and shaft.
If there is no resistance between the yoke and shaft:
Replace the yoke.
4.
Install and tighten the input, output, or pinion shaft nut to
the correct torque. Refer to Section 12 Specifications on
page 77.
5.
Install the driveline.
6.
Remove the safety stands.
7.
Lower the vehicle.
Copyright Meritor, Inc., 2023
Prepare Parts for Assembly
B
A
Minimum Yoke Diameter
at Groove (Inches)
2.990"
3.240"
MM-0170 / Revised 03-23
1003390e
Page 33
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