W250 3/4 Ton Pickup 4WD V8-318 5.2L VIN R 4-bbl (1982)
CAUTION: Under no condition should air pressure be used to remove piston from bore. Personal injury could result from such practice.
5. Disconnect brake flexible hose from the caliper.
6. Mount caliper assembly in a vise equipped with protector jaws.
CAUTION: Excessive vise pressure will cause bore distortion and binding of piston.
7. Remove dust boot using suitable tool.
8. Using a small, pointed, wooden or plastic rod, work piston seal out of its groove in piston bore. Discard old seal.
CAUTION: Do not use a screwdriver or other metal tool for this operation, because of possibility of scratching piston bore or burring edges of
seal groove.
Bendix Disc System 8 Lug Wheels
1. Clamp caliper in vise (with protector jaws).
CAUTION: Excessive vise pressure can cause bore distortion and binding of piston.
Fig 14 Installing Piston Seal
2. Lubricate the new piston seal with clean brake fluid and position the seal in the groove in the cylinder bore.
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Position seal in one area of groove and gently work around and into the groove until properly seated.
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Be sure seal is not twisted or rolled.
3. Coat new piston boot with brake fluid.
