Measuring Lateral Run-Out

Fig 1: Dial Indicator Installed

Courtesy of VOLVO CARS OF NORTH AMERICA.

Install the dial gauge in the bracket as illustrated.

Position the tip of the dial gauge against the brake disc. Rotate the brake disc. Use a socket to help. Note the test gauge run-out. Brake disc lateral run-out must not exceed 0.075 mm.

If lateral run-out exceeds the value, replace the brake disc.

NOTE:

Always check the wheel hub's lateral runout according to: WHEEL HUB FRONT, CHECKING before installing a new brake disc.

To replace the brake disc, see: FRONT BRAKE DISC (B5244S4, AW55-50/51SN; B5244S4, M56; 2004-2010) or FRONT BRAKE DISC (B5254T3, AW50/51 AWD; B5254T3, M66 AWD; 2005-2007) .