Fabco SDA-2300, Service Manual

Page: 15 / 41

4.4 SPINDLE YOKE REMOVAL
1. Due to its high torque, loosening the 4 1/8" lower
kingpin locknut (see Section 9.14 Special
Tools) will require substantial leverage.
Re-
move the grease fitting from the lower kingpin
ball stud. Now the ball stud can be removed.
(See Section 9.15 Special Tools.)
See
Figure 14
.
2. Remove the cotter pins from both tie rod ends.
Unscrew both castle nuts so that only a few
threads remain in engagement. Use a suitable
puller to extract the tie rod end from the suspen-
sion yoke. Completely remove the nuts and tie
rod.
WARNING: DO NOT STRIKE THE TIE ROD
END BALL STUD.
3. Loosen the upper kingpin adjusting screw jam
nut and back out the adjusting screw until the
spindle yoke stops moving downward and is
resting on the suspension yoke. Remove the
two 7/8" steering arm or upper kingpin cap
locknuts and bolts. Then pull the steering arm
or cap up and off the mounting studs and locat-
ing dowel. If difficulty is encountered, turn the
adjusting screw back in to force the arm or cap
off the studs. See
Figure 15.
4. Remove the drive yoke bearing retaining snap
ring and thrust washer. The yoke shaft bearing
removal is optional. Remember to repack the
bearing upon installation.
5. Remove the 1"-14 upper kingpin bolt. Special
tool number 866 744 (see section 9.8 Special
Tools) should now be used to pull the upper
kingpin ball stud from the suspension yoke.
See
Figure 15A
. Fit one tube over the locating
dowel and the other is allowed to float freely. In-
sert the 1 1/8"-12 bolt through the spacer and
the tool's central hole. The bolt should then be
threaded into the top of the upper kingpin ball
stud. Tighten the bolt until the ball stud is pulled
free of the suspension yoke. Remove the tool,
grasp the spindle yoke firmly and disengage it
from the suspension yoke. An over-head crane
would make this procedure a lot easier.
CAUTION: DO NOT TRY TO REMOVE THE
UPPER KINGPIN BALL STUD BY
ROCKING THE SPINDLE YOKE,
AS THIS MAY AFFECT THE
CRITICAL PRESS FIT BETWEEN
THE BALL STUD AND SUSPEN-
SION YOKE.
CAUTION: DO NOT PROCEED FURTHER
UNLESS THE DIFFERENTIAL OIL
HAS BEEN DRAINED.
6. Remove the drive and axle shaft assemblies by
sliding them out of the axle housing being very
careful not to score the inner axle seal. See
Fig-
ure 16
. No need to take this assembly apart un-
less replacing the cross and bearing.
– 14 –
1/96
Figure #15A
Figure #14
Figure #15