Sterling Trucks Acterra MX - Manual (Page 101)

screws, then loosen the bearing cup capscrews
(at the bearing with the dry seal) to relieve seal
tension. Lubricate the U-joint until the old
grease is purged, then tighten the capscrews to
the above specifications, and bend the tabs of
the lockstrap against a flat side of each cap-
screw. If the bearing will not take grease, re-
place the U-joint assembly; see Group 41 of the
Acterra
® Workshop Manual.
4. Check the old grease. If it appears rusty, gritty, or
burned, replace the U-joint assembly. See Group
41 of the
Acterra ® 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
Fig. 4 , 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
Fig. 4 , 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
Acterra Maintenance Manual, March 2000 41/4