34 33 000 Removing and installing or replacing brake booster (brake servo)

Necessary preliminary tasks: 

• Read and comply with GENERAL INSTRUCTIONS .
• Remove the TANDEM BRAKE MASTER CYLINDER .
• Remove left FOOTWELL TRIM .

Removal: 

Detach retaining clip (1) from brake pedal, disengage and pull out retaining bolt (2).

Fig 1: Detaching Retaining Clip From Brake Pedal

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Unscrew nuts (1).

Fig 2: Locating Brake Booster Nuts

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Pull non-return valve (1) in direction of arrow out of brake booster.

Fig 3: Pulling Non-Return Valve Of Brake Booster

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Carefully pull brake servo (1) out of bulkhead and tilt out in upward direction.

Fig 4: Pulling Brake Servo Out Of Bulkhead

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Installation: 

Carefully insert brake servo (1) into bulkhead.

Fig 5: Brake Servo

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Check seal in brake booster, replace if necessary.

Install non-return valve (1) in direction of arrow into brake booster.

Fig 6: Brake Booster Non-Return Valve Location

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Insert nuts (1) and tighten.

Replace self-locking nuts.

Parts:  Self-locking nuts.

Tightening torque 34 33 1AZ .

Fig 7: Locating Brake Booster Nuts

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Grease retaining bolt (1) with lubricating grease NBU 12K (part number: 83 23 9 407 810;  ).

Install retaining bolt (1) through brake pedal.

Mount retaining clip (2) on retaining bolt.

Replace retaining clip (2).

Fig 8: Installing Retaining Bolt Of Brake Booster

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