Hummer H1 Service Manual page 408

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CHECKING WHEEL ALIGNMENT
1. Move vehicle onto alignment rack and position front tires
on alignment rack turntables.
2. Place front wheels in straight ahead position on turntables.
3. Install alignment measuring equipment on vehicle wheels.
Follow manufacturers instructions to avoid incorrect
measurements.
SUSPENSIO TIRE
N PRESSURE
POSITION (PSI)
FRONT 26
REAR 28
To measure in inches, 0.1 degree = 1/16", 0.19 degrees = 1/8", 0.25 degrees = 5/32
(A) Left and right side to be equal within 0.5 degrees.
(B) Left and right side to be equal within 1.0 degrees.
(C) Toe-in (Positive sense) left and right sides to be set separately and evenly per wheel. Steering wheel must be held in a
center position within + or - 5 degrees
(D) Toe-out (negative sense) left and right side to be set separately and evenly per wheel
(E) Left and right side toe settings to be equal within 0.10 degree
NOTE:
Alignment settings should be checked and adjusted on a rack that allows all four wheels/tires to support vehicle weight.
Set wheel alignment while the vehicle is in its normally loaded condition.
Vehicles which are consistently operated with heavy on-board loads should have alignment adjusted with the vehicle under heavy
on-board load.
Ride height should be checked and corrected if necessary and the hood should be closed while taking measurements (See "Suspen-
sion Height Measurement" Section 9).
05745159
Wheels and Tires/Central Tire Inflation System (CTIS)
SERVICE WHEEL ALIGNMENT
SERVICE CHECKING
CASTER CAMBER
(DEGREES) (DEGREES)
+1.5 to +4.0 -0.2 to +1.75
(B) (B)
-0.2 to +1.75
na (B)
4. Measure and record caster, camber, toe-in, and toe-out.
Refer to alignment specifications (Figure 6-42).
5. If alignment angles are within specified limits, move
vehicle from rack. However, if angles are incorrect, leave
vehicle on alignment rack and proceed to Wheel
Alignment Correction.
CASTER
TOE-TOTAL
(DEGREES)
(DEGREES)
0 to +0.25 +2.5 to +3.5
(C) (A)
na
-0.25 to 0
(D)
6-25
SERVICE SETTING
CAMBER TOE-TOTAL
(DEGREES) (DEGREES)
+0 to +0.50 0 to +0.19
(A) (C&E)
+.25 to -0.19 to 0
+0.75 (A) (D&E)