Fabco SDA-2300, Руководство по обслуживанию, Страница: 11 / 41

6. Advance the lower kingpin ball stud until the
feeler gage stack or drift loosens. (See Section
Special Tools 9.15.) This indicates that the ball
stud threads are actually beginning to spread
the suspension and spindle yokes apart. See
Figure #5A
7. Back off the ball stud enough to allow the clos-
est hole in the lower kingpin lock washer to en-
gage the retaining dowel pin. Apply grease to
the surface of the lower kingpin lock washer that
will face the locknut.
This helps keep the
washer from turning when the locknut is tight-
ened. Torque the locknut to 2,000 lb.-ft. (See
Section Special Tools 9.14)
CAUTION: DO NOT TORQUE LOWER
KINGPIN BALL STUD.
8. Back out the upper kingpin adjusting screw just
enough to relieve pressure so the end can turn
freely (approximately 1/16 turn) and torque the
jam nut to 75 lb.-ft.
3.4 TOE-IN ADJUSTMENT
It is not recommended to raise the front of the truck to
check toe-in; at the factory, the setting is made with the
axle loaded to simulate actual operating conditions. An
expandable toe-in alignment bar is recommended but if
unavailable consult an alignment specialist. Since the
SDA-1800, 2100, and 2300 axles use an offset tie rod
tube, adjustment is not made by turning the tube itself,
but rather by rotating a small adjuster located at the left or
right end of the tie rod tube. See
Figure 6.
It is critical to
making the adjustment accurately that the front wheels
are as close to straight ahead as possible. Loosen the tie
rod adjuster and tie rod clamp.
1. Whichever end the tie rod adjuster is located
toe-in is increased by unscrewing the adjuster
from the tie rod itself. The correct setting is
0- 1/8" toe-in. In the case of a vehicle with full-
time four-wheel drive (proportioning differen-
tial), the setting reverts to 0-1/8" toe-out
(greater distance in the front than the rear).
Consult a tire specialist for a specific recom-
mendation if specialized tires are used.
2. Tighten both clamp bolts to 75 lb.-ft. Roll the ve-
hicle forward a distance equal to four rotations
of the wheels, taking care to maintain their
straight-ahead alignment. Recheck the toe-in
and repeat this procedure if necessary to obtain
the correct dimension.
– 10 – 7/99
Figure #6
Figure #5
Figure #5A