A8L Quattro Sedan V8-4.2L (AKB) (2002)
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Installing, Refer to Figs. 3, 4, and 5
6. Protective caps
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Do not damage when installing piston
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Install so that outer sealing lip goes over piston, Refer to Fig. 3
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Install so that inner sealing lip enters groove in brake caliper housing - Fig. 4
Brake caliper piston, removing and installing
Special Tools and Equipment
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3409 wedge
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Brake piston resetting tool
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G 052 150 A2 brake cylinder paste
Removing
Fig. 1 Pressing pistons from brake caliper housing using compressed air (individually)
Note:
Insert brake pad -b- in piston. Place a wooden board -a- into the recess of the caliper housing to catch the pistons so they are not damaged.
Only one piston can be pressed out at a time-hold the other piston securely in brake caliper housing using piston resetting tool.
Fig. 2 Removing sealing rings using 3409 wedge
Note: When removing, make sure that surface of cylinder is not damaged.
