freightliner COLUMBIA CL112 Maintenance Manual page 91

Driveline
41–01 Driveline Inspection
1. Park the vehicle on a flat, 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. Do not over-tighten bearing-cap
capscrews or yoke-strap capscrews.
2. For driveline universal joints with bearing caps,
tighten bearing-cap capscrews 43 lbf·ft (49 N·m).
See Fig. 1, Ref. 1.
For RPL series universal joints, tighten bearing-
cap capscrews 125 lbf·ft (169 N·m). See
For driveline universal joints with yoke straps,
tighten yoke-strap capscrews 125 lbf·ft (169
N·m). See Fig. 3.
1
04/13/98
1. Self-Locking
Capscrew
Fig. 1, Meritor U-Joint Fasteners for Bearing Caps
3. Check the driveline yokes for cracks, and check
end-yokes for looseness. See
Replace cracked yokes.
Columbia Maintenance Manual, March 2000
Fig. 2.
1
2
I
1
f410155a
2. Adhesive Band
Fig. 3.
12/09/97
Fig. 2, Meritor RPL Series U-Joint
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 Columbia
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.
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. See Group 41 of the
Columbia ® Workshop Manual for torque specifi-
cations. Replace the midship bearing assembly if
the rubber cushion is deteriorated or oil-soaked.
6. Check slip joints for spline wear by moving the
sleeve-yoke and splined shaft back and forth.
See Fig. 4. If the slip joint can be twisted in a
clockwise, or counterclockwise movement
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Workshop Manual
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