Wheel Alignment Measurement C Model

1. Satisfactory vehicle operation may occur over a wide range of front wheel alignment settings. If the settings vary beyond the tolerances, adjustments are needed. Refer to Wheel Alignment Specifications .

As originally installed, the upper control arm cannot be adjusted for the camber or the caster. However, if the camber or the caster is out of tolerance, the alignment can be reset to specifications by removing the knockouts in the upper control arm frame brackets. Refer to Frame Bracket Knock Out Removal .

Upon removal of the control arm, remove the inserts outboard from the inside of the bracket with the J 38794 . Refer to Frame Bracket Knock Out Removal .

Important: Set the front wheel alignment to the specifications while the vehicle is in its normally loaded condition. For vehicles which are consistently operated with heavy loads, adjust the toe-in with the vehicle under heavy load. Following this procedure prolongs the life of the tires.

2. Measure the front alignment angles.
3. Install the alignment equipment according to the manufacturer's instructions.
4. Measure the alignment angles and record the readings.
5. Make any required adjustments in the following order:

5.1.

Caster

5.2.

Camber

5.3.

Toe-in

Important: All of the caster specifications are given with the vehicle frame level (zero angle).

In order to make the caster or the camber adjustments, the frame bracket knockouts must be removed. Refer to Frame Bracket Knock Out Removal .
6. Position the vehicle on a smooth, level surface.
7. Correct the Z dimension specification. Refer to Trim Height in Suspension General Diagnosis.
8. Measure the frame angle, using a bubble protractor or inclinometer.

The frame angle is the tilt (in degrees) of the frame from the level position.

9. Note the frame angle as being either up in the rear or down in the rear.
10. Determine the caster angle from the alignment equipment.
11. Determine the caster reading. Refer to Wheel Alignment Specifications .
12. Correct the caster as follows:

12.1.

A down-in-the-rear frame angle must be subtracted from a positive caster reading.

12.2.

An up-in-the-rear frame angle must be added to a positive caster reading.

12.3.

A down-in-the-rear frame angle must be added to a negative caster reading.

12.4.

An up-in-the-rear frame angle must be subtracted from a negative caster reading.

13. If the caster angle is wrong, remove the frame bracket knockouts. Refer to Frame Bracket Knock Out Removal .
14. Reset the caster angle by turning the cam bolts. Refer to Wheel Alignment Specifications .

Important: In order to make the caster or the camber adjustments, remove the frame bracket knockouts. Refer to Frame Bracket Knock Out Removal .

15. Determine the camber from the alignment equipment.
16. If the camber angle is wrong, remove the frame bracket knockouts. Refer to Frame Bracket Knock Out Removal .
17. Reset the camber angle by turning the cam bolts. Refer to Wheel Alignment Specifications .
18. Determine the toe-in from the alignment equipment.
19. Change the length of both tie rod sleeves in order to affect a toe-in change. The toe-in can be increased or decreased by changing the length of the tie rod ends. A threaded sleeve is provided for this purpose. When the tie rod ends are mounted ahead of the steering knuckle they must be decreased in length in order to increase the toe-in. When the tie rod ends are mounted behind the steering knuckle they must be lengthened in order to increase the toe-in. Refer to Wheel Alignment Specifications .

Wheel Alignment Measurement K Model

1. Satisfactory vehicle operation may occur over a wide range of front wheel alignment settings. If the settings vary beyond the tolerances, adjustments are needed. Refer to Wheel Alignment Specifications .

As originally installed, the upper control arm cannot be adjusted for the camber or the caster. However, if the camber or the caster is out of tolerance, the alignment can be reset to specifications by removing the knockouts in the upper control arm frame brackets. Refer to Frame Bracket Knock Out Removal .

Upon removal of the control arm, remove the inserts outboard from the inside of the bracket with the J 38794 . Refer to Frame Bracket Knock Out Removal .

Important: Set the front wheel alignment to the specifications while the vehicle is in its normally loaded condition. For vehicles which are consistently operated with heavy loads, adjust the toe-in with the vehicle under heavy load. Following this procedure prolongs the life of the tires.

2. Measure the front alignment angles.
3. Install the alignment equipment according to the manufacturer's instructions.
4. Measure the alignment angles and record the readings.
5. Make any required adjustments in the following order:

5.1.

Caster

5.2.

Camber

5.3.

Toe-in

Important: All of the caster specifications are given with the vehicle frame level (zero angle).

In order to make the caster or the camber adjustments, the frame bracket knockouts must be removed. Refer to Frame Bracket Knock Out Removal .
6. Position the vehicle on a smooth, level surface.
7. Correct the Z dimension specification. Refer to Trim Height in Suspension General Diagnosis.
8. Measure the frame angle, using a bubble protractor or inclinometer.

The frame angle is the tilt (in degrees) of the frame from the level position.

9. Note the frame angle as being either up in the rear or down in the rear.
10. Determine the caster angle from the alignment equipment.
11. Determine the caster reading. Refer to Wheel Alignment Specifications .
12. Correct the caster as follows:

12.1.

A down-in-the-rear frame angle must be subtracted from a positive caster reading.

12.2.

An up-in-the-rear frame angle must be added to a positive caster reading.

12.3.

A down-in-the-rear frame angle must be added to a negative caster reading.

12.4.

An up-in-the-rear frame angle must be subtracted from a negative caster reading.

13. If the caster angle is wrong, remove the frame bracket knockouts. Refer to Frame Bracket Knock Out Removal .
14. Reset the caster angle by turning the cam bolts. Refer to Wheel Alignment Specifications .

Important: In order to make the caster or the camber adjustments, remove the frame bracket knockouts. Refer to Frame Bracket Knock Out Removal .

15. Determine the camber from the alignment equipment.
16. If the camber angle is wrong, remove the frame bracket knockouts. Refer to Frame Bracket Knock Out Removal .
17. Reset the camber angle by turning the cam bolts. Refer to Wheel Alignment Specifications .
18. Determine the toe-in from the alignment equipment.
19. Change the length of both tie rod sleeves in order to affect a toe-in change. The toe-in can be increased or decreased by changing the length of the tie rod ends. A threaded sleeve is provided for this purpose. When the tie rod ends are mounted ahead of the steering knuckle they must be decreased in length in order to increase the toe-in. When the tie rod ends are mounted behind the steering knuckle they must be lengthened in order to increase the toe-in. Refer to Wheel Alignment Specifications .