Western Star 47X 2020, Maintenance Manual

Page: 114 / 166

any movement of the U-joint cross in the bear-
ings can be felt or seen, replace the U-joint as-
sembly.
5. Check if the midship bearing and mounting are
loose or have deteriorated, by attempting to
move the driveshaft up and down, and from side
to side. If the bearing is loose on its shaft, or
rattles, replace it. If the bearing mount is loose
on the frame, tighten the mounting fasteners to
the proper torque value. Replace the midship
bearing assembly if the rubber cushion is dete-
riorated or oil-soaked.
6. Check slip joints for spline wear by moving the
sleeve-yoke and splined shaft back and forth.
See
Fig. 5 . If the slip joint can be twisted in a
clockwise, or counterclockwise movement
greater than 0.007 inch (0.18 mm), replace both
the sleeve-yoke and the splined shaft.
7. Visually examine the driveshaft tubes for dents,
bends, twists, or other damage. If any tube ap-
pears to be damaged, replace it.
8. Examine the driveshaft for evidence of missing
balance weights, and for buildup of foreign mate-
f410067b 10/06/2016
1
2
3
3
4
5
6
7
8
9
10
11
12
13
14 15
16
NOTE: Not all fasteners are shown.
1. Transmission
2. Transmission Output-Shaft
End-Yoke (yoke-strap type)
3. U-Joint Assembly
4. Bearing Cap Self-Locking
Capscrew
5. Bearing Cap
6. U-Joint Cross
7. Bearing Cup (for yoke strap)
8. Yoke Strap and Capscrew
9. Slip-Joint Assembly
10. Sleeve-Yoke (bearing-cap type)
11. Dust Cap
12. Splined Stub Shaft
13. Driveshaft Tube
14. Tube-Yoke (bearing-cap type)
15. Axle Input-Shaft End-Yoke
(yoke-strap type)
16. Rear Axle
Fig. 3, Components of a Basic Driveline
Driveline
41
47X and 49X Maintenance Manual, August 2020
41/2