Front End Alignment; Alignment Adjustment - GMC 1976 ZEO 6083 Maintenance Manual

3A- 2 0 FRONT SUSPENSION
Figure 30-Location For Front Ride Height
Adjustment
NOTE :
For details on adjusting rear ride height
refer to Section 4, REAR SUSPENSION . If
vehicle is equipped with the optional Power
Level System, be sure power level control knobs
are set in the "TRAVEL" position prior to ad-
justing front ride height .
Measurements must be taken from the top of oval
hole in the frame rail to the floor (figure 31). NOTE :
Never attempt to increase the ride height of the vehi
cle using the adjusting bolt only, (figure 30). The bolt
will turn but will strip threads and will necessitate
replacement of the bolt . Always use special tool .
RIDE HEIGHT ADJUSTMENT
NOTE : Tool
J-22517-02 (shown in figure 16)
must be used the reset ride height . This tool will
raise or lower the torsion bar rear anchor arm so
that the adjusting bolt is not loaded .
Figure 31-Vehicle Ride Height
1 . Install Tool J-22517-02 with pin of tool aligned
into hole in crossmember. Seat center screw in dim-
ple of torsion bar adjusting arm .
2. If vehicle must be raised, turn tool until proper
adjustment level is reached, then turn the adjusting
bolt until it makes contact with the adjusting arm.
Remove tool .
3 . If vehicle is to be lowered, raise adjusting arm
from contact with adjusting bolt . Lower bolt then
lower arm with tool until proper ride height level is
reached. Raise bolt to contact adjustment arm.
Remove tool .
Camber
FRONT END ALIGNMENT
Check Set
Caster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . + 1-1/2' to
+ 2-1/2°
+2°
Camber-L.H . . . . . . . . . . . . . . . . . . . . . +1/2°to 1° +3/4°
Camber-R .H . . . . . . . . . . . . . . . . . . . .+ 1/4° to 3/4° + 1/2°
Toe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0 to -1/4"
-1/8 -,
(toe out) (toe out)
Make adjustments as required . Refer to
"ALIGNMENT ADJUSTMENT" below.
ALIGNMENT ADJUSTMENT
1. Loosen nuts on inboard side of upper control
arm cam bolts. (figure 4) .
2. Turn front cam bolt (inboard or outboard) to
correct for 1/2 of incorrect setting found in check-
ing.
3. Turn rear cam bolt (same way front bolt was
turned) to correct for remaining 1/2 of incorrect
setting found in checking .
*N
GROUND LEVEL
FRONT RIDE HEIGHT 13 1/8" ± 1/4"
23' MODEL 40 3/8"
26' MODEL
56 3/8"
REAR RIDE HEIGHT 11 11/16" ± 1/4"
A-3985