Thomas SAF-T-LINER C2, Maintenance Manual

Page: 107 / 176

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 or motor, 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
WARNING
Do not service or inspect a driveshaft with the en-
gine running. A rotating driveshaft can cause seri-
ous personal injury.
Loose end yokes, excessive radial looseness, slip
spline radial looseness, bent shaft tubing, or missing
plugs in the slip yoke can cause universal joint and
bearing defects.
See Fig. 1 for an illustration of half-round end yokes.
1. Check the output and input end yokes on both
the transmission and axle for axial looseness.
Refer to the axle or transmission manufacturer’s
service information for the correct specifications.
If loose, disconnect the driveshaft. For instruc-
tions, see
Group 41 of the vehicle Workshop
Manual , or take the vehicle to an authorized
Freightliner dealer. Tighten the end yoke retain-
ing nut to the proper specification. Refer to the
axle or transmission manufacturer’s service infor-
mation for the correct specifications.
2. Inspect for worn universal joints. Apply a vertical
force of about 50 pounds to the driveline near
the universal joints. If there is any movement,
replace the universal joint. For instructions, see
Group 41 of the vehicle Workshop Manual , or
take the vehicle to an authorized Freightliner
dealer.
3. Examine the slip yoke spline for excessive radial
movement. See
Fig. 2 . If excessive radial loose-
ness exists between the slip yoke and the tube
shaft, replace the slip yoke and the tube shaft.
For instructions, see
Group 41 of the vehicle
Workshop Manual , or take the vehicle to an au-
thorized Freightliner dealer.
4. Examine the shaft for damaged or bent tubing.
Carefully remove any foreign material such as
mud or dirt that has built up on the shaft.
41–02 Driveline Lubrication
The Easy Service driveline requires periodic lubrica-
tion of the universal joints and slip yoke splines. See
Table 1 for approved lubricants.
09/19/2001
f410484
Fig. 1, Half-Round End Yoke
f410486 09/19/2001
Fig. 2, Checking for Radial Looseness of the Slip Yoke
Spline
Driveline
41
Saf-T-Liner C2 School Bus Maintenance Manual, June 2018
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