freightliner Argosy COE 2011, Maintenance Manual

Page: 130 / 193

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 cannot drop. Failure to follow these steps
could result in serious personal injury or death.
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 Fig. 2 .
For driveline universal 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. See
Group
41 of the Century Class Trucks 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.
5. Check if the midship bearing and mounting are
loose or have deteriorated, by attempting to
f410155a 10/06/2016
1
1 1
2
ME
R I TOR
1. Self-Locking
Capscrew 2. Adhesive Band
Fig. 1, Meritor U-Joint Fasteners for Bearing Caps
f410182 10/06/2016
Fig. 2, Meritor RPL Series U-Joint
Driveline
41
Century Class Trucks Maintenance Manual, January 2016
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