A4 Sedan V6-3.2L (BKH) (2007)
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It should not be possible to remove the protective seal from the brake caliper housing by hand.
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Apply a thin coat of lithium grease (G 052 150 A2) to the piston and seal before inserting.
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Lift up the piston with an extension - 1 - and ratchet - 2 - as shown in the illustration and press lightly onto the protective cap.
‹› Make sure not to tilt the piston to avoid damage to the seal.
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Inflate the protective cap with compressed air (maximum 3 bar). The protective cap will then locate around the brake piston.
Use jaw protectors
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Press the piston into the brake caliper housing by hand.
‹› The protective seal inner sealing lip will then locate in the piston groove.