NOTICE
Fresh lubricant must be seen escaping from all
four of the bearing cup seals of each U-joint. If
not, the U-joint may fail prematurely.
4. If the bearing will not take grease, replace the
U-joint assembly. For instructions, see Group 41
of the vehicle Workshop Manual, or take the ve-
hicle to an authorized Freightliner dealer.
5. Check the old grease. If it appears rusty, gritty, or
burned, replace the U-joint assembly. For instruc-
tions, see Group 41 of the vehicle Workshop
Manual, or take the vehicle to an authorized
Freightliner dealer.
6. Wipe any excess grease from the seals and
grease fittings.
Slip-Joint Spline Lubrication
1. Wipe all old grease and dirt from the slip-joint
grease fitting.
2. Use a hand-type grease gun or a high-pressure
gun with a low-pressure adaptor, to lubricate the
slip-joint. Using lithium 12-hydroxy stearate
grease (NLGI grade 1 or 2, with EP additives),
lubricate until fresh grease appears at the
pressure-relief hole in the yoke plug. Then cover
the relief hole with your finger, as shown in
Fig. 1, while continuing to lubricate until fresh
grease appears at the slip-joint seal. This en-
sures complete lubrication of the splines.
3. Wipe any excess grease from the pressure-relief
hole, slip-joint seal, and grease fitting.
Driveline41
Recreational Vehicle Chassis Maintenance Manual, June 201541/2
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