2. For a quick check, the thickness of friction material remaining on each brake pad can be measured through the aperture in the caliper body (see illustration). If any pad's friction material is worn to the specified thickness or less, all four pads must be renewed as a set.
14.2. Brake pad friction material thickness can be checked with the pads in place - ATE type caliper shown
3. For a comprehensive check, the brake pads should be removed and cleaned. The operation of the caliper can then also be checked, and the condition of the brake disc itself can be fully examined on both sides. Refer to Chapter 9 for further information.
