41–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, set the parking brake, and chock the tires.
Before working under the vehicle, always place
jack stands under the frame rails to ensure the
vehicle can not drop. Failure to follow these steps
could result in serious personal injury or death.
41–01 Driveline Inspection
1.
Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
CAUTION
Due to the extreme load occurring at high-speed
rotation, a loose or broken capscrew at any point
in the driveline will weaken the driveline connec-
tion, which could eventually result in serious ve-
hicle damage. Tighten bearing-cap capscrews or
yoke-strap capscrews to specified torque, being
careful to not overtighten.
2.
For U-joints with bearing caps,
tighten bearing-
cap capscrews 43 lbf·ft (49 N·m). See
Fig. 1
.
For Arvin Meritor RPL series U-joints,
tighten
bearing-cap capscrews 125 lbf·ft (169 N·m). See
Fig. 2
.
For U-joints with yoke straps,
tighten yoke-strap
capscrews 125 lbf·ft (169 N·m). See
Fig. 3
.
3.
Check the driveline yokes for cracks, and check
end-yokes for looseness. See
Fig. 3
.
Replace cracked yokes.
If any end-yoke can be moved in or out on its
shaft, or can be rocked on its shaft, disconnect
the driveshaft and U-joint from the yoke, then
check the drive component’s shaft seal for leak-
age or other visible damage that may have been
caused by the loose yoke. Replace the seal if
needed, then tighten the yoke nut. Refer to
Group 41
of the
Cascadia
™
Workshop Manual
for torque specifications. If the yoke is still loose
after tightening the yoke nut, replace the end-
yoke and yoke nut.
Replace the prevailing torque locknut (end-yoke
nut) if it was removed for yoke replacement, seal
replacement, or any other reason.
4.
Check U-joint assemblies for wear by moving the
driveshaft up and down, and from side to side. If
any movement of the U-joint cross in the bear-
ings can be felt or seen, replace the U-joint as-
sembly.
f410155a
04/13/98
1
1
1
2
ME
R I TOR
1.
Self-Locking
Capscrew
2.
Adhesive Band
Fig. 1, Arvin Meritor U-Joint Fasteners for Bearing
Caps
f410182
12/09/97
Fig. 2, Arvin Meritor RPL Series U-Joint
Driveline
41
Cascadia Maintenance Manual, August 2015
41/1
