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12 October, 19:01

The alignment readings for the front of a vehicle are shown above. Camber and toe are within specification, caster is not. Technician A says that with the current settings, the left front tire tread may wear on the inside edge. Technician B says that with the current settings, the vehicle may pull to the left. Who is right? A. A only B. B only C. Both A and B D. Neither A nor B

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  1. 12 October, 22:42
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    B. B only

    Given Information:

    1. Camber and toe are within specification

    2. Caster is not within specification

    Technician A says that with the current settings, the left front tire tread may wear on the inside edge.

    Technician B says that with the current settings, the vehicle may pull to the left

    Explanation:

    Lets discuss the effects of Camber, toe and caster misalignment

    Effects of Camber and Toe misalignment:

    Camber is the inward or outward tilt of the fron tires and is used to distribute load across the tread. Any misalignment causes uneven loading on the tires which results in tire wear on one edge.

    The most common cause of tire wear on the inside edge is due to the camber misalignment which results in premature tire wear.

    Another reason is of tire wear is vehicle's toe. A slight misalignment of the toe reduces the life of the tire.

    Since it is given that camber settings and toe settings are within specification therefore, tire tread wear on the inside edge cannot happen if camber and toe are within specification.

    Technician A cannot be right.

    Effects of Caster misalignment:

    Whenever there is a misalignment of the castor then the vehicle will not be able to go in straight line rather it will pull to either left or right side. Caster misalignment also causes heavy or light steering depending upon the positive or negative misalignment of caster.

    Since it is given that caster settings are not within specification therefore, the vehicle may pull to the left due to the caster misalignment.

    Technician B must be right.
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