OEM 2004 Toyota Echo Brake Caliper

2004 Toyota Echo Parts Questions & Experts Answers

• Q: How to service and repair the brake caliper on 2004 Toyota Echo?

  A: Service or repair of the brake caliper starts by using a screwdriver to remove the set ring along with the cylinder boot. A piece of cloth should first be positioned between the caliper and piston followed by compressed air usage while removing the piston from the cylinder to avoid positioning fingers in front of the piston. You should use a screwdriver to remove the piston seal after working with the cylinder. The pad lining thickness must be checked with a ruler to determine replacement; pads need replacing when they reach minimum thickness of 1.0 mm (0.039 inch) or standard thickness of 11.0 mm (0.433 inch) or display severe uneven wear. Use a micrometer to measure the disc thickness and change the part to a new one if it will not exceed or go below the minimum standard measurement which is 18.0 mm (0.709 inch) and 16.0 mm (0.630 inch). If the measurement is bad enough for replacement discard the disc for replacement. The disc runout requires measurement at a point 10 mm (0.39 inch) from the edge using a dial indicator with a maximum marking of 0.05 mm (0.0020 inch) that requires checking both bearing play in the axial direction and axle hub runout. Runout adjustment on the disc remains an option until you determine it should be ground using a "On-car" brake lathe. The disc runout adjustment process begins with removal of the 2 mounting bolts along with torque plate from the knuckle followed by hub nuts and disc extraction. Reinstall the disc while rotating it by one quarter compared to its original positioning on the hub then torque the hub nuts to 88 Nm (900 kgf-cm, 65 ft. lbs.). The service must continue with disc installation until minimal runout reaches under 0.05 mm (0.0020 inch) at which point the disc should stay in its best position; otherwise discard the disc for replacement and repeat the runout check. Attach the torque plate along with two mounting bolts before torquing them to 88 Nm (900 kgf-cm, 65 ft. lbs.). Disc brake grease and lithium soap base glycol grease must be applied to specified parts during the reverse process of disassembly.