Brake Job Tools: Conical Washers

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Doing a brake job requires special tools and materials. These tools are separate from the sockets, ratchets and air tools that you use every day in your shop. In the fifth part of our series, we talk about the importance of using conical washers before tightening the rotor down to check lateral runout.

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With today's tight lateral runout specifications, it is important to check lateral runout before sending a vehicle out of your shop. To do this, you need to tighten the rotor down. However, tightening the lug nuts against the rotor can damage the lug nuts, the rotor or both.

Using conical washers can protect the lug nuts and rotor from damage. This will allow you to safely check the lateral runout of the rotor. Slide the washers over the studs before installing the lug nuts. Then, tighten down. They don't have to be to specifications. But they must be tightened down evenly.