Proper Installation Of Conical Spring And Adjusting Bolt - Mazda 1983 RX7 Service Manual

Disassembly (RX7)
1) Remove dust boot retainer and boot. Turn piston
counterclockwise with disc brake piston wrench (49 FA18 602), and
screw out piston. Remove piston seal.
2) Remove boot retainer. Slip off boot. Remove snap ring.
Compress conical spring in caliper with spring compressor (49 FA18
601), valve spring lifter arm (49 0636 100A), and removing plate (49
E301 144).
3) Remove parking brake crank, torsion spring and strut.
Remove adjusting bolt and conical spring assembly. Press out needle
roller bearings.
Inspection
1) Clean all parts in brake fluid or alcohol. Air dry parts.
Inspect caliper bore for scratches, scoring or rust. Minor damage can
be removed by polishing with crocus cloth.
CAUTION: Never use gasoline or kerosene when cleaning caliper parts.
2) Inspect needle roller bearing, strut, adjusting bolt, and
parking brake crank for corrosion, wear or damage. Check torsion
spring and conical spring for corrosion, weakness or damage.
3) Check piston and sleeve nut for excessive play. It should
be within .012-.020" (.3-.5 mm).
Reassembly
1) Assemble the caliper in the reverse order of disassembly.
Use new piston and dust seals. Three kinds of grease contained in
seal kit must be used.
2) White grease is for caliper slide bolts and mounting
bolts. Orange grease is for bearings, adjusting bolt, strut and
piston boot. Pink grease is for piston seal.
3) Lubricate the piston and caliper bore with clean brake
fluid. Press in needle roller bearing so that arrow on bearing faces
outward.
4) Assemble conical spring and adjusting bolt. See Fig. 5.
Install adjusting bolt assembly, strut and torsion spring in the
caliper. Install piston using disc brake wrench, as described under
Disc Brake Pad Installation.
Fig. 5:

Proper Installation of Conical Spring and Adjusting Bolt

Apply orange grease, supplied in seal kit, to adjusting bolt.
BRAKE SYSTEM
Article Text (p. 7)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 04:54PM