Runout

Measuring the Front Brake Disc Lateral Runout

Includes: Measuring the brake disc thickness tolerance
- Measuring prerequisite: No tilt play at the wheel.

NOTE:
- If necessary, provide the dial gauge holder with the ATE conversion set, order No. 03.9314 - 5510.3/01 (longer clamping wing screw and, possibly, also a bracket for the dial gauge).
- Do not damage the expanding spring when fitting the dial gauge holder.





1. Mount the adapter plate 9510/1 on the wheel hub. Tightening torque of the wheel bolts (fastening screws): 130 Nm (96 ftlb.).
2. Insert dial gauge holder, e.g. Ate order No. 03.9314-5500.3/01, into the brake caliper, align it and secure it by tightening the clamping wing screw. If the brake disc cannot be turned freely, set the brake pads back a little.





3. Secure the dial gauge with some preload. Put the measuring tip against the largest diameter of the brake surface.
4. Turn the brake disc and, when doing so, read off the lateral runout at the dial gauge.

NOTE:
- Lateral runout of the removed brake disc: max. 0.03 mm.
- Wheel hub lateral runout: max. 0.03 mm.
- The permissible lateral runout of the installed brake disc is max. 0.06 mm.
- Do not damage the brake hoses or brake lines during removal/installation of the brake caliper.

5. If the brake disc lateral runout exceeds 0.06 mm, mark the position in relation to the wheel hub and remove the brake disc. Check the wheel hub lateral runout.