BMW 7 Series: Brake Lines

OVERVIEW OF BRAKE LINES

Fig. 94: Overview Of Brake Lines

1. Brake hose, front
2. Brake tubes
3. Brake hose, rear

REPLACING ALL BRAKE PIPES

Notes

NOTE: The brake lines are only supplied in the straight version and correct length with connecting nipple.

After completing tasks, BLEED BRAKE SYSTEM.

The new brake lines are bent into shape with bending tool 34 5 100.

Removed brake pipes can be used as templates for bending.

IMPORTANT:

• Protective coating of brake line must not be damaged during bending.
• Do not kink or bend back brake lines.
• Watch distances to rigid and movable vehicle parts. Brake lines may not make contact or rub.
• Tighten down brake line couplings with torque wrench.

Fig. 95: Removing Brake Pipes Using Bending Tool (34 5 100)

Installation: Tightening torque 34 32 1AZ.

REPLACING FRONT LEFT OR RIGHT BRAKE HOSE

Necessary preliminary tasks

• Remove WHEEL
• Read and comply with GENERAL INFORMATION.

After completing work: replace fluid in brake system.

Press clutch pedal down to floor and secure with pedal support.

NOTE: The pedal support may only be released when the brake lines are reconnected.

This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Fig. 96: Pressing Clutch Pedal Down

Detach brake hose (1) from brake caliper.

If necessary, grip at knurling (2).

Installation: Tightening torque 34 32 2AZ.

Fig. 97: Identifying Brake Hose And Knurling

Release union screw (1). If necessary, grip at square head.

Installation: Position guides (3) correctly in holder (4).

Tightening torque 34 32 1AZ.

Fig. 98: Identifying Union Screws, Guides And Holder

Release brake hose from holders (1).

IMPORTANT: Observe installation sequence:

1. Fasten brake hose in holders (1).
2. Move wheels into straight-ahead position.
3. Fasten brake hose at pipe/brake hose connection.
4. Fasten brake hose at brake caliper.

Fig. 99: Identifying Holders

Never twist brake hose when installing it and avoid all contact with parts attached rigidly to the body.

REPLACING REAR LEFT OR RIGHT BRAKE HOSE

NOTE: Read and comply with GENERAL INFORMATION.

After completing work: replace fluid in brake system.

Press clutch pedal down to floor and secure with pedal support.

NOTE: The pedal support may only be released when the brake lines are reconnected.

This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Fig. 100: Pressing Clutch Pedal Down

IMPORTANT: Grip brake hose at square head (2) so that connecting piece can not rotate in retaining bracket.

Disconnect brake hose from brake line (1).

Installation: Tightening torque 34 32 1AZ.

Fig. 101: Identifying Brake Hose And Brake Line

Detach brake hose from brake caliper (1).

Installation: First tighten brake hose on brake caliper.

Tightening torque 34 32 3AZ.

Fig. 102: Identifying Brake Caliper

IMPORTANT: Never twist brake hose when installing it and avoid all contact with parts attached rigidly to the body.

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