Unit Repair

CALIPER OVERHAUL

Tool Required:
J 29381 Boot Seal Installer

Disassemble


Figures 11 through 13

Remove or Disconnect

FIGURE 11 - CALIPER ASSEMBLY:

FIGURE 12 - REMOVING PISTON:

1. Caliper completely from vehicle as previously described.

2. Piston (9) using compressed air into the caliper inlet hole (Figures 11 & 12).

CAUTION: Do not place fingers in front of the piston in an attempt to

catch or protect it when applying compressed air. This could result in serious injury.

Important

^ Use clean shop towels to pad the interior of the caliper (13) during removal.
v Inspect

^ Piston (9) for:
- - Scoring
- - Nicks
- - Corrosion
- - Worn or damaged chrome plating

FIGURE 13 - REMOVING BOOT:

^ Replace piston if any of the above are found.

3. Boot (7), being careful not to scratch housing bore.

4. Piston seal (10) from groove in caliper (13) bore with a small wood or plastic tool. Do not use a metal tool since this may damage caliper bore or seal groove.
v Inspect

^ Aluminum caliper bore and seal groove for:
- - Scoring
- - Nicks
- - Corrosion
- - Wear
^ Use crocus cloth to polish out light corrosion.
^ Replace caliper housing if corrosion in and around seal groove will not clean up with crocus cloth.

FIGURE 1 - CALIPER ASSEMBLY DISASSEMBLED VIEW:

5. Protector (11) and bleeder valve (12) from caliper
(13) (Figure 1).

v Assemble

FIGURE 11 - CALIPER ASSEMBLY:

FIGURE 14 - INSTALLING BOOT AND PROTECTOR ONTO PISTON:

FIGURE 15 - SEATING BOOT INTO HOUSING:

Figures 11, 14 and 15

v Important

^ See NOTICE on page 5-1.

v Clean

^ All parts in clean, denatured alcohol.
^ Dry with unlubricated compressed air.
^ Blow out all passages in housing (13) and bleeder valve (12).

v Install or Connect

FIGURE 1 - CALIPER ASSEMBLY DISASSEMBLED VIEW:

FIGURE 11 - CALIPER ASSEMBLY:

1. Bleeder valve (12) and protector (11) to 9-16 N-m (80-140 in.lb.) (Figures 1 & 11).
2. Lubricated new piston seal (10) into caliper bore groove.

FIGURE 14 - INSTALLING BOOT AND PROTECTOR ONTO PISTON:

^ Make sure seal is not twisted.
3. Lubricated boot (7) and protector (8) into piston
(9) (Figure 14).
4. Piston (9) with boot (7) and protector (8) into bore of caliper and push to bottom of bore.

FIGURE 15 - SEATING BOOT INTO HOUSING:

5. Seat boot (7) in caliper housing (13) counterbore using J 29381 (Figure 15).
6. Caliper as previously described.