1. Wheel Alignment Geometry

2. Wheel Alignment Set to Specification Ensures proper tire wear. Ensures proper steering response. Ensures directional stability. Ensures correct steering wheel position. Ensures alignment angles are within manufactures specifications.

3. What are the “symptoms” of a car that's out of alignment? Excessive or uneven tire wear. Steering wheel pulls to the left or right. Feeling of looseness or wandering. Steering wheel vibration or shimmy. Steering wheel is not centered when car is moving straight ahead

4. Today’s Lesson Objective Camber Angle & Caster Angle Describe what the angles are. Describe how to interpret readings Analyze data Report findings Make / Adjust for corrections

5. Pre Alignment Inspection Tire condition Tire air pressure Suspension components Steering linkage Looseness

6. Camber Angle Camber: The inward or outward tilt of tire viewed at the top. Zero degree camber indicates the tire and wheel assembly are at true vertical. Positive camber indicates the top of the tire is leaning away from the vehicle. Negative camber indicates the top of the tire is leaning towards the vehicle.

7. Camber Excessive camber angle out of manufactures specification causes premature tire shoulder wear + outer, - inner Vehicle drift or pull A side to side camber angle difference greater than 0.50◦ may cause a pull

8. Caster Caster: The forward or rearward tilt of the steering axis compared to vertical as viewed from the side. Zero degree caster indicates the upper and lower pivot points are vertical to each other. Positive caster indicates the upper pivot point is rearward (behind) of the lower. Not considered a major tire wear angle if out of specifications.

9. Caster Negative caster indicates the upper pivot point is forward of the lower pivot point. Positive caster maintains directional stability. Side to side difference more than 0.50 degrees may cause a pull or drift. Caster pulls toward the more negative side