
Copyright Meritor, Inc., 2021
MM-96147 / Revised 03-21
Page 74
(16579)
Printed in USA
13 Troubleshooting
Table J: Slip Yoke Spline Wear
Condition Cause
Correction
Seizure
Incorrect lubrication
Lubricate the slip yoke spline according to specifi cations.
Check the seal.
Worn or damaged part
Replace the spline components.
Contamination
Lubricate the slip yoke spline according to specifi cations.
Check the seal.
Galling
Worn or damaged parts
Replace the spline components.
Contamination
Lubricate the slip yoke spline according to specifi cations.
Check the seal.
Outside diameter wear at
extremities
Incorrect lubrication
Lubricate the slip yoke spline according to specifi cations.
Check the seal.
Excessive loose outside diameter fi t
Replace the spline components.
Spline shaft or tube broken in
torsion
Tube size inadequate
Use a larger diameter tube.
Excessive torque load for universal
joints and driveline size
Replace with a higher capacity universal joint and driveline.
Table K: Shaft and Tube
Condition Cause
Correction
Shaft support bearing wear
Driveline too long for operating
speeds
Install a two-piece driveline with a shaft support bearing.
Incorrect lubrication of bearings
Replace the center bearing.
Shaft support rubber insulator
wear
4001863a
Bending fatigue due to secondary
couple loads
Reduce the universal joint continuous running angle.
Excessive torque load for universal
joint and driveline size
Replace with a higher capacity universal joint and driveline.
Shaft support bearing misaligned;
interferes with defl ector
Realign the mounting bracket-to-frame crossmember to eliminate
interference with the defl ector.
Tube circle weld fracture
Balance weight located in apex of
weld yoke lug area
Replace the tubing and rebalance.
Balance weight too close to circle
weld
Replace the tubing and rebalance.
Incorrect circle weld
Replace the tubing and rebalance.
Shaft broken in
bending
Driveline too long for operating
speeds
Install a two-piece driveline with a shaft support bearing.
Bending fatigue due to secondary
couple loads
Reduce the universal joint continuous running angle.