A4 Sedan L4-1.8L Turbo (AWM) (2001)
Brake Caliper: Service and Repair
Double Piston Brake Caliper Pistons, Removing and Installing
Special tools and equipment
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3409 wedge
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Piston resetting tool
Fig. 1 Pressing pistons individually out of brake caliper housing using compressed air
WARNING:
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Risk of accident! Apply pressure gradually. Guard against the sudden release of file piston.
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Always wear safety glasses when carrying out this step.
Note:
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Insert brake pad -b- into piston. Place wooden block -a- into the space so the pistons are not damaged.
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Only one piston can be pressed out at a time: hold the other piston tight using the piston resetting tool in the brake caliper housing during this step.
Fig. 2 Removing seals using 3409 wedge