OEM 2002 Toyota Echo Brake Caliper

2002 Toyota Echo Brake Caliper Parts Q&A

• Q: How to service and repair the brake caliper on 2002 Toyota Echo?

  A: Service and repair of the brake caliper starts by using a screwdriver to remove the set ring and cylinder boot. First place a cloth piece between the caliper and piston and then apply compressed air to push the piston out from the cylinder while maintaining your fingers behind the piston position. The cylinder piston seal extraction should be performed with a screwdriver. During pad inspection check the lining thickness with a ruler because the ideal thickness is 11.0 mm (0.433 inch) but any pad needs to be changed if it drops below 1.0 mm (0.039 inch) or shows severe wear patterns. Look to the micrometer for measuring disc thickness because this checks against a standard of 18.0mm (0.709 inch) which needs replacement when minimum 16.0 mm (0.630 inch) becomes equal or lower or when disc requires lathe grinding for severe marking or uneven wear. Examine the disc runout with a dial indicator placed 10 mm (0.39 inch) from the disc edge for maximum runout limit of 0.05 mm (0.0020 inch); evaluate bearing axial play and axle hub runout when the measured runout exceeds the limit. A normal disc runout measurement indicates both discs can receive brake lathe grinding while installed on the vehicle. The necessary hub nut removal requires first removing the knuckle torque plate and its mounting bolts as well as disassembly of the hub nuts and the disk. Install the disc on the hub after turning it one-quarter circle from its original position then tighten both hub nuts to 65 ft-lb of torque. The minimum disc runout should be below 0.05 mm (0.0020 inch) through a series of installation attempts; otherwise a new disc needs replacement for additional runout measurement. The procedure ends with torque plate installation and securement of 2 mounting bolts which should be torqued at 88 Nm (900 kgf-cm, 65 ft. lbs.). When reassembling the components the technician follows the opposite sequence of disassembly steps by lubricating specific elements with lithium soap base glycol grease and disc brake grease.