Checking Lateral Runout (Brake Disc/Wheel Hub) And Thickness Tolerance
Information
Secure dial gauge set with ball joint arm to wheel bearing housing.
Two adapters are used for checking lateral runout. The brake disc and wheel hub can be measured with these.
Brake disc lateral runout
- Removing wheel.
> 440519 REMOVING AND INSTALLING WHEEL - on "Removing"
- Tighten > 9510/1 - adapter plate
to tightening torque 160 Nm (118 ftlb.). > Adapter plate on wheel hub
Adapter plate on wheel hub
- Fit adapter > Nr.147-1 - dial gauge set with ball joint arm
at a suitable position on the wheel bearing housing. > Dial gauge on brake disc
Dial gauge on brake disc
- Fit dial gauge with slight pretension and measure the lateral runout at the greatest external diameter of the brake disc.
Wheel hub lateral runout
Information
The front face of the wheel hub must not be corroded and must be cleaned if necessary using a polishing cloth.
Measure the wheel hub lateral runout at the front face of the wheel hub. Take measurements in each case at the external and internal diameter of the wheel bolt area.
- Removing rear brake disc.
> 465319 REMOVING AND INSTALL THE BRAKE DISC REAR - on "Removing"
- Fit adapter > Nr.147-1 - dial gauge set with ball joint arm
at a suitable position on the wheel bearing housing. Secure the dial gauge with slight preload. > Dial gauge on wheel hub
Dial gauge on wheel hub
Brake disc thickness tolerance
For details of brake disc thickness tolerance, see Technical data/brake wear limits.
> Refer to WM, 4600TW GREY CAST-IRON BRAKES - TECHNICAL VALUES AND WEAR LIMITS
Measure the thickness tolerance using a suitable micrometer screw at 8 places within the braking surface.
- Depending on the measured result, re-install the brake discs or replace them on both sides of the axle.
> 465319 REMOVING AND INSTALLING THE BRAKE DISC REAR - on "Installing"
- Install wheels.
> 440519 REMOVING AND INSTALLING WHEEL - on "Installing"