Fabco SDA-2300, Service Manual

Page: 18 / 41

5. Place the spindle yoke on the suspension yoke,
optimally with some lifting device. See
Figure 21
. Install the upper kingpin ball stud and
bolt. It is recommended to replace the bolt with
a new one from Fabco. If a replacement bolt is
not available, use the existing bolt and apply
Loctite #272 to its threads during assembly.
Torque the bolt to 1,000 lb.-ft.
6. Reinstall the yoke shaft bearing, if removed,
making sure it is packed liberally with grease.
See
Figure 22
. Replace the thrust washer and
snap ring.
7. Smear the spherical portion of the lower kingpin
ball stud with grease. Screw the lower kingpin
ball stud into the spindle yoke. Ensure that the
locating pin for the kingpin lock washer is in po-
sition in the yoke, then loosely install the lock
washer and nut.
8. After wiping both mounting surfaces clean of
grease, push the steering arm or upper kingpin
cap down over its mounting studs and pilot
dowel, install the two 3/4" nuts, and torque to
250 lb.-ft. Install the upper kingpin adjusting
screw, its jam nut, and the lubrication fitting in
the cap or arm.
9. Complete steps 4-7 of Section 3.3 (Kingpin Ad-
justment) in this manual.
10. Install the spindle over the yoke shaft and spin-
dle yoke studs. See
Figure 23
.
CAUTION: THE KEYWAY MUST BE LO-
CATED IN THE 12 O'CLOCK PO-
SITION.
Torque the spindle nuts to 250 lb.-ft. using a uni-
formed torque sequence.
11. Reinstall the tie rod end, torque the castle nut to
100 lb.-ft., and fit a new cotter pin.
6.3 BRAKE EQUIPMENT
1. If necessary, press new seals and bushings into
the air chamber mounting bracket and spindle
yoke. Seals must be installed flush so that the
lip side (with spring) of both seals face toward
the slack adjuster end of the bracket. Improp-
erly oriented seals may allow grease to exit the
camshaft head end and contaminate the brake
linings.
CAUTION: THE CAM HEAD END BUSHING
SHOULD BE RECESSED 5/16"
TO ALLOW CLEARANCE FOR
THE
SEAL. THE BRAKE
BRACKET BUSHING SHOULD BE
RECESSED 23/32" TO ALLOW
CLEARANCE FOR THE SEAL.
2. Push the S-camshaft all the way into the mount-
ing braket from the wheel side until the cam
head contacts the bracket.
Next, push the
camshaft tube onto the shaft. Make sure that
the O-rings are set in the grooves on the cam-
shaft tube.
CAUTION: LEFT AND RIGHT HAND
S-CAMSHAFTS ARE NOT
INTERCHANGEABLE.
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Figure #23
Figure #22
Figure #21