OEM 2001 Toyota Avalon Brake Caliper

2001 Toyota Avalon Brake Caliper Parts Q&A

• Q: How to Service and Repair a Brake Caliper on 2001 Toyota Avalon?

  A: A screwdriver enables service and repair work on the brake caliper through set ring and cylinder boot removal. After inserting cloth between the piston and caliper you should use compressed air to remove the piston but keep your fingers safely behind it. Remove the piston seals from the cylinder using a screwdriver while you should first remove the two sliding pins from the torque plate which requires placing the sliding pin with a bushing before reinstalling into the top side. A screwdriver and hammer will be needed to tap out the 2 dust boots before new dust boots are installed using a 24 mm socket wrench into the torque plate with careful assembly to ensure proper placement of the metallic boot section. To inspect pad lining thickness, use a ruler to measure pad thickness; the acceptable pad thickness stands at 11.0 mm (0.433 inch) but a pad needs replacement if its thickness drops below 1.0 mm (0.039 inch) or it exhibits severe or uneven wear. One should measure the disc thickness through micrometric procedures to replace it if measurements fall below minimum standards (minimum 26.0 mm or 1.024 inch). However, if the disc is in a suitable condition then precision grinding on a lathe machine is acceptable. The measurement of disc runout should occur at 10 mm (0.39 inch) from the disc edge using a dial indicator while a maximum allowable runout value is 0.05 mm (0.0020 inch). Excessive runout requires checking bearing play and axle hub runout then possible disc runout adjustment through grinding on a "On-Car" brake lathe. Start by removing the mounting bolts with torque plate and hub nuts from the knuckle and disc using a 1/5 turnaround increase of the disc position on the hub before torquing hub nuts to 103 Nm (1,050 kgf-cm, 76 ft. lbs.). Repetitionally measure the disc runout because the goal is a minimum value below 0.05 mm (0.0020 inch) for any disc position on the hub through this installation process; proceed with disc replacement if the minimum runout exceeds 0.05 mm. The reassembly process requires the torque plate installation along with bolt torque to 107 Nm (1,090 kgf-cm, 79 ft. lbs.) while lubricating specific parts with lithium soap base glycol grease.