Removal, Inspection & Installation
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- Raise and support vehicle. Remove wheels. Remove brake hose mounting bolt from knuckle. Use wrench to hold sub pin to prevent twisting boot. Remove lower caliper bolt. Carefully pivot caliper up out of way, watching for pad springs. Check hoses and pin boots for damage and deterioration. Remove pad shims, pad retainers, and pads. See Fig 1. Using vernier calipers, measure the thickness of each brake pad lining. The measurement does not include pad backing plate thickness. See DISC BRAKE SPECIFICATIONS .
- If brake pad thickness is less than service limit, replace front pads as a set. Clean caliper thoroughly; remove any rust, and check for grooves and cracks. Check brake disc for damage and cracks. Install pad retainers. Apply Dow Corning Molykote M77 grease to pad side of pad shims and back and tips of pads. Wipe excess grease off shim. Contaminated brake discs or pads reduce stopping ability. Keep grease off discs and pads.
- Install brake pads and pad shims correctly. Install pad with wear indicators on inside. If you are reusing pads, always reinstall pads in their original positions to prevent a momentary loss of braking efficiency. Push in piston so caliper will fit over pads. Check brake fluid level. Brake fluid may overflow if reservoir is too full. Make sure piston boot is in position to prevent damaging it when pivoting caliper down.
- Pivot caliper down into position. Being careful not to damage pin boot, install flange bolt and torque to specifications. See TORQUE SPECIFICATIONS . Install brake hose onto knuckle. Press brake pedal several times to make sure brakes work, then test-drive. After installation, check for leaks at hose and line joints or connections, and retighten if necessary.NOTE: Engagement of brake may require a greater pedal stroke immediately after brake pads have been replaced as a set. Several applications of brake pedal will restore normal pedal stroke.