OEM Toyota Echo Brake Caliper

Toyota Echo Brake Caliper Parts and Q&A

• Caliper, Passenger Side
  47730-52020
  Q: How to service and repair the brake caliper on Toyota Echo?

  A:

  Service and repair of the brake caliper begins by using a screwdriver to remove set ring and cylinder boot. Position a cloth piece between the caliper and piston before you use compressed air to pull out the piston through the cylinder. Always avoid placing your fingers in front of the piston while working. The cylinder demands a screwdriver to eliminate its piston seal. Measuring pad lining thickness with a ruler must be done because standard is 11.0 mm (0.433 inch) but minimum stands at 1.0 mm (0.039 inch); replace pads when they reach minimum threshold or display severe pad damage. Use a micrometer to check the wheel disc thickness according to standard specifications which state 18.0 mm (0.709 in.) for a 13 inch disc and 16.0 mm (0.630 in.) for the same size and 20.0 mm (0.787 in.) for a 14 inch disc and 18.0 mm (0.709 in.) for this larger size. Disc replacement is required when minimum size is reached or wear damage exists. Measure the disc runout 10 mm from its outer edge using a dial indicator to check if maximum runout reaches 0.05 mm. Further investigation must address axial bearing play and axle hub runout to determine if disc adjustment or grinding is needed. The disc installation requires tilting it 1/4 turn from its original position before reattaching it to the hub while torquing the hub nuts to 88 Nm (900 kgf-cm, 65 ft. lbs.). Begin with bolt removal from the knuckle along with torque plate and hub nuts and disc. Reinstall the disc while checking its runout value until the minimum tolerance reaches below 0.05 mm (0.0020 inch); if this tolerance cannot be achieved, substitute the disc and measure its runout once more. Finishing the process includes putting back the torque plate and mounting bolts while torquing them to 88 Nm (900 kgf-cm, 65 ft. lbs.). The reinstallation proceeds with symmetric steps that start by reversing the order of disassembly steps while lubricating specific parts with lithium soap base glycol grease and disc brake grease.