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Never use an air hose or dry brush to clean brake assemblies. Use an OSHA-approved vacuum cleaner to avoid breathing brake dust . 1. Loosen the front wheel nuts slightly, then raise the vehicle and support if on safety stands. 2. Remove the caliper bolt, and pivot the caliper up out of the way. NOTE: Check the hoses and pin boots for damage or deterioration. 3. Remove the pad shim, pad retainers and pads. 4. Using vernier calipers, measure the thickness of each brake pad lining. The measurement does not include pad backing plate thickness. Brake Pad Thickness: Standard: Type R Model: 10.5 – 11.5 mm 10.41 – 0.45 inch) All except Type R Model: 9.5 – 10.5 mm (0.37 – 0.41 inch) Service Limit: 1.6 mm 10.06 inch) 5. If the brake pad thickness is less than the service limit, replace the front pads as a set. 6. Clean the caliper thoroughly; remove any rust, and check for grooves and cracks.