S4 Quattro Sedan V6-2.7L Turbo (APB) (2000)
Brake Caliper: Service and Repair
Aluminum Rear Brake Caliper Pistons, Removing and Installing
Special tools and equipment
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3409 wedge
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3272 reset and screw out tool
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3272/1 support plate
Unscrewing piston from the brake caliper housing
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Remove piston by turning threaded spindle -A counter clockwise and knurled section -B clockwise.
Installing protective seal with outer sealing lip over piston