screw. If the bearing will not take grease, re-
place the U-joint assembly; see Group 41 of the
School Bus Chassis Workshop Manual.
4.
Check the old grease. If it appears rusty, gritty, or
burned, replace the U-joint assembly. See Group
41 of the
School Bus Chassis Workshop Manual
.
5.
Wipe any excess grease from the seals and
grease fittings.
Slip-Joint Spline Lubricating
1.
Wipe all old grease and dirt from the slip-joint
grease fitting. See
, Ref. 1.
2.
Use a hand-type grease gun or a high-pressure
gun with a low-pressure adapter, 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, while continuing
to lubricate until fresh grease appears at the slip-
joint seal. See
, Ref. 6. This ensures com-
plete lubrication of the splines.
3.
Wipe any excess grease from the pressure-relief
hole, slip-joint seal, and grease fitting.
Driveline
41
School Bus Chassis Maintenance Manual, April 1998
41/4
