Checking tires for lateral and radial runout

AR40.10-D-1025A

Checking tires for lateral and radial runout

14.9.11



Measuring



Excessive lateral runout at the rim or tire corresponds to a dynamic imbalance which distorts the toe-in and camber values set. Radial runout at the tire and rim corresponds to a static imbalance which causes impact shock forces on the tires, wheel bearings and steering.

1

Raise vehicle at the front

2

Adjust measuring wheel to height of center of axle

Dial gauge P 22

3

Attach measuring wheel in the center of the contact patch, turn wheel on the vehicle by hand and measure radial runout

 1 graduation = 1 mm. Compensate for excessive radial runout of the tire by turning on the rim. If this is not successful, check wheel centering or change tire or wheel.

*BE40.10-N-1001-01B

4

Attach measuring wheel to the side of the rim flange, turn the wheel by hand and measure lateral runout

 There are faults in the rim and wheel hub if there is excessive lateral runout.
Replace the appropriate parts.

15-16 inch tire

*BE40.10-N-1002-01B

17.5 inch tire

*BE40.10-N-1003-01B

5

Attach measuring wheel to the tire flank, turn wheel by hand and measure lateral runout

 Measure on the periphery at a point without marking.

Number

Designation

Models 667, 668, 670

BE40.10-N-1001-01B

Radial runout at tire (wheel fitted to vehicle)

–

mm

1.5–2

Tires

inch

15

–

inch

16

–

inch

17.5

BE40.10-N-1002-01B

Lateral runout of rim at rim flange

–

mm

1.25

Tires

inch

15–16

BE40.10-N-1003-01B

Lateral runout of rim at rim flange

–

mm

1.5

Tires

inch

17.5