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 and
Lubrication
Inspection
Before lubricating the driveline U-joints and slip-
joints, make the following checks.
1. Check that the yoke-strap capscrews are tight-
ened 50 to 60 lbf·ft (68 to 81 N·m).
NOTICE
Do not overtighten the yoke-strap capscrews, due
to the extreme load occurring at high-speed rota-
tion. A loose or broken capscrew at any point in
the driveline weakens the driveline connection,
which could eventually result in serious vehicle
damage.
2. Check the slip-joints for spline wear by trying to
bend the sleeve-yoke and splined shaft back and
forth. If looseness is greater than 0.007 inch
(0.18 mm), replace both the sleeve-yoke and the
splined shaft.
3. Check the driveshaft for missing balance
weights, and for debris buildup. Remove any
buildup. If any balance weights are missing, re-
move the driveshaft and have it balanced. For
instructions, see Group 41 of the vehicle Work-
shop Manual, or take the vehicle to an autho-
rized Freightliner dealer.
4. Check that the yoke plug is not loose or missing.
Replace the yoke plug if needed. If the yoke plug
is missing, the splined shaft may be hitting the
yoke plug and knocking it out; check the drive-
shaft for proper length.
U-Joint Lubrication
1. Wipe all old grease and dirt from each U-joint
grease fitting.
2. Use a hand-type grease gun, or a high-pressure
gun with a low-pressure adaptor, to lubricate the
U-joints. See
Fig. 1.
NOTE: If a low-pressure adaptor is not used
with the high-pressure gun, the U-joints may not
receive enough lubricant.
3. Using lithium 12-hydroxy stearate grease (NLGI
grade 1 or 2, with EP additives), lubricate until
new grease can be seen at all four U-joint seals.
f410050a10/07/2016
1
1
2
3
3
3
4
5
6
7
8
A
A. After grease appears, cover the pressure-relief hole
while continuing to lubricate.
1. Slip-Joint Grease
Fitting (with grease
gun attached)
2. Yoke Plug
3. Grease
4. Half-Round Yoke
5. Yoke Plug Pressure-
Relief-Hole
6. Slip-Joint Seal
7. Full-Round Yoke
8. U-Joint Grease Fitting
Fig. 1, Slip-Joint and U-Joint Lubricating
Driveline 41
Recreational Vehicle Chassis Maintenance Manual, June 2015 41/1
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