GMC 1982 Light Duty Truck Service Manual page 368

3 C -2 6 FRONT SUSPENSION
BALL JOINT ADJUSTMENT (K10, K20)
Front axle ball joint adjustment is generally necessary
only when there is excessive play in steering, irregular wear
on tires or persistent loosening of the tie rod is observed.
1. Raise vehicle on hoist then place jack stands just inside
of front springs.
2. Disconnect connecting rod and tie rod to allow
independent movement of each steering knuckle.
3. Apply a fish-scale to the tie rod mounting hole of the
steering knuckle arm. With the knuckle assembly in the
straight-ahead position, determine the right angle pull
required to keep the knuckle assembly turning after
initial break-away. This pull should not exceed 25 lbs.,
for each knuckle assembly, in either direction. See
Figure 3C-3K.
BEARING LUBRICATION
Front Wheel Bearings
Spindle Bearings
W henever front wheel bearings are lubricated, the
spindle needle bearings should also be lubricated, with the
same chassis grease. U n d er normal conditions, the
lubrication interval should be 12,000 miles; off-road use
such as in mud or w ater will require shorter intervals. The
M A IN TEN A N C E A N D ADJUSTMENTS
Fig. 3 C -3 K --D e te rm in in g F ro n t A x le B all J o in t T u rn in g E ffo rt
spindle bearings are accessible after removing the spindle,
as shown in Figure 3C-6K.
WHEEL BEARING ADJUSTMENT
1. After lubricating the wheel bearings and the spindle
bearings, install the hub-and-disc, and the outer wheel
bearing to the spindle.
2. Torque the inner adjusting nut to 50 foot pounds, (60
N-m) while rotating the h ub-and-disc to seat the
bearings. Use Tool J-6893 and A dapter J-23446 or
J-6893-01 for K 10, K20; use J-26878 for K30. Back off
the inner adjusting nut and retorque to 35 ft. lbs. (47
N-m) while the hub is being rotated.
3. Back off the inner a d justing nut again 3/8 turn
maximum. Assemble the drag sleeve retainer washer
over the axle shaft against the bearing adjusting nut
(Item # 3 0 , Fig. 3C-3K). The tang on the inside
diameter of this washer is assembled in the keyway of
the spindle. The pin on the inner nut (Item # 3 1 )
M U S T pass through one of the holes in the retainer
washer. Assemble and tighten the outer lock nut to
217-310N -m (160-205 lb. ft.).
H ub assembly should have .025 to .254 mm (.001 to
.010 inch) end play.
4. Install the locking hub assembly. Refer to hub
assembly and installation procedures.