4-Wheel Alignment Steering and Suspension Diagnosis

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JOB SHEET A4E3: 4-Wheel Alignment

Start Date:

Name: End Date:

Make: Model: Year:

VIN: Mileage:

Learning Objective/NATEF task

• Check and adjust front and rear wheel camber; perform necessary action. o NATEF task A4/E3, P1. ICS 156

• • Check and adjust caster; perform necessary action. o NATEF task A4/E3, P1. ICS 156

• • Check and adjust front wheel toe and center steeling wheel. o NATEF task A4/E3, P1. ICS 156

• • Check toe-out-on-turns (turning radius); determine necessary action. o NATEF task A4/E3, P2. ICS 156

• Check SAI (steering axis inclination) and included angle; determine necessary action.

o NATEF task A4/E3, P2. ICS 156 • Check and adjust rear wheel toe.

o NATEF task A4/E3, P2

• Check rear wheel thrust angle; determine necessary action. o NATEF task A4/E3, P2

• Check for front wheel setback; determine necessary action. o NATEF task A4/E3, P2

Tools and Materials

• Classroom vehicle(s) and/or components • OEM service manual

• 4-wheel alignment equipment • Safety glasses

Procedure

1. You must understand and observe all State/Federal Regulations and personal safety procedures when carrying out the following task(s). Wear safety

glasses for this entire procedure.

2. Review “Measuring and Correcting Wheel Alignment” in Lesson 3 of Unit 14 of the A4 course.

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Your instructor must stamp or initial the box to the right before you can proceed with this job sheet.

1. Measure front and rear suspension alignment angles following prompts on the computerized alignment display. Record specifications and your

measurements below:

Specified Front Camber •Measured left front camber

•Measured right front camber

Specified Cross Camber •Measured cross front camber

Specified Front Caster •Measured left front caster

•Measured right front caster

Specified Cross Caster •Measured cross front caster

Specified Front SAI •Measured left front SAI

•Measured right front SAI

•Measured included angle

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Specified Front Toe •Measured left front toe

•Measured right front toe

•Measured total front toe

Specified Rear Camber •Measured left rear camber

•Measured right rear camber

Specified Rear Toe •Measured left rear toe

•Measured right rear toe

•Measured total rear toe

2. In the OEM service manual for your classroom vehicle, locate the procedure for adjusting front-wheel caster and camber and include any needed special tools. Submit this process to your instructor or mentor for approval and then answer the following questions.

Your instructor must stamp or initial the box to the right before you can proceed with this job sheet.

Make sure alignment adjustments are made in the sequence prescribed by OEM. Making adjustments in wrong sequence can result in a poor alignment.

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for adjusting front toe. Submit this process to your instructor or mentor for approval and then answer the following questions.

Your instructor must stamp or initial the box to the right before you can proceed with this job sheet.

5. Following procedure, adjust front toe to specifications and list below how you did it:

6. In the OEM service manual for your classroom vehicle, locate the procedure for adjusting rear camber and toe if adjustable. Submit this process to your instructor or mentor for approval and then answer the following questions.

Your instructor must stamp or initial the box to the right before you can proceed with this job sheet.

7. Following procedure, adjust rear camber and toe to specifications. Note below if they were not adjustable and why:

8. If thrust angle and SAI are out of specifications, what is a possible cause and can it be corrected?

9. Measure turning radius and compare to OEM specifications. OEM specified turning radius for this vehicle is:

10. For left turn, turning radius of right front wheel was:

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12. For right turn, turning radius of right front wheel was:

13. For right turn, turning radius of left front wheel was:

14. What are results?

15. The steering wheel is centered properly with front wheels straight ahead standing still, but steering wheel is not centered when driving vehicle. List causes of this problem:

16. Place front wheels in a straight-ahead position.

17. Using chalk or white paint, mark each tie rod sleeve in relation to tie rod, loosen sleeve clamps.

18. Position steering wheel in position it was in while driving straight ahead during road test.

19. Turn steering wheel to a centered position and note front wheel direction.

20. What direction are the front wheels turned with the steering wheel centered?

21. If steering wheel is low on left side while driving vehicle straight ahead, use a tie rod sleeve rotating tool to shorten left tie rod and lengthen right tie rod.

A 1/4 turn on the tie rod sleeve moves steering wheel position approximately one inch.

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lengthen left tie rod and shorten right tie rod. What did you need to do?

24. Mark each tie rod sleeve in its new position in relation to tie rod. Tighten the clamp bolts to OEM torque. What is OEM tie rod clamp bolt torque

specification?

25. Remove vehicle from alignment rack and return it to normal condition.

26. Along with your instructor or mentor, check steering wheel position during a road test. Were you able to center the steering wheel?

Task Summary

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List a customer complaint together with the cause determined by this diagnostic/ inspection task that might appear on a work order, and then list the NATEF task correction you would use to resolve the complaint.

Use this rubric to rate the completion of job sheet

1 = Demonstrates exposure/observation of the competency 2 = Applies the competency but only mastered a few essential

attributes of the competency

3 = Capable of the competency but needs further practice 4 = Performs the competency satisfactorily

5 = Masters the competency

Figure

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References

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