A4 Quattro Sedan V6-2.8L (ACK) (1997)
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Loosen hose clamp on suction hose -1 and detach.
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Disconnect brake lines -3- and -4-.
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Seal brake lines and threaded holes with plugs from repair kit Part No. 1 HO 698 311A.
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Unclip brake lines from fixture.
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Remove nut -2-.
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Remove bolts for mounting bracket, item 3 .
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Working from engine compartment, lift bracket together with hydraulic pump approximately 30 mm (1 3/16 in) and remove.
Installing
Note:
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When installing, pay particular affection to the points.
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Only remove the sealing plugs on the new hydraulic control unit when the corresponding brake line is about to be installed.
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If the sealing plugs are removed too early the brake fluid can escape.
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Bleed brake system.
Bleeding brake system using US1116 brake bleeder
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Connect US1116 brake bleeder.
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Open bleeder screws in the sequence and bleed brake calipers (assist with pedal pressure, if necessary).
Bleeding sequence
2 - Left-rear brake caliper
3 - Right-front brake caliper
1 - Right-rear brake caliper
4 - Left-front brake caliper