Brake hose / line connection piece. Porsche 911 / 912 / 914 / 356  ❭  91435566100

Brake Hose / Line Connection Piece 

The brake line connector is used within the hydraulic brake line system, providing the intermediate connection required between the appropriate brake hose and brake line components. 

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 356A 1955-59
• Porsche 356B 1959-63
• Porsche 356C 1963-65
• Porsche 914 (1970-1976)

Diagram ref no 11

Although small, this connection piece forms an important part of the hydraulic braking system. A secure, correctly sealed connection helps maintain brake fluid pressure between the rigid brake pipe and associated hydraulic components.

What Does the Brake Hose / Line Connection Piece Do?

The connection piece provides a secure joining point within the vehicle's hydraulic brake circuit.

When the brake pedal is pressed, hydraulic pressure generated by the master cylinder must travel through the brake pipes and flexible hoses to the brake calipers or wheel cylinders. Every connection within this system must remain securely sealed to prevent loss of brake fluid and hydraulic pressure.

Why Is It Important?

The braking system relies on a closed hydraulic circuit. Even a relatively small leak at a brake line connection can result in fluid loss and reduced braking effectiveness.

A correctly fitted connection piece helps:

• Provide a secure brake hose/line connection
• Maintain the integrity of the hydraulic brake circuit
• Prevent brake fluid leakage at the joint
• Maintain correct factory brake line routing
• Provide the correct connection when replacing brake pipes or hoses
• Restore the original brake system during a classic Porsche restoration

Because it forms part of a safety-critical hydraulic system, the fitting and surrounding brake lines should always be inspected carefully during brake servicing.

Why Does It Fail?

Metal brake fittings can deteriorate after decades of service, particularly on classic Porsche models exposed to moisture, road dirt and road salt.

Common problems include:

• External corrosion
• Damaged or rounded threads
• Seized brake pipe fittings
• Damage during removal of old brake hoses or pipes
• Distorted sealing surfaces
• Previous overtightening
• Cross-threading
• Contamination around the connection
• General deterioration associated with age

Older fittings can also become extremely difficult to separate from the brake pipe after many years in position. Attempting to force a seized connection may damage the fitting or adjoining brake line.

When Should It Be Replaced?

Replacement should be considered if the connection piece is corroded, damaged, seized or no longer provides a reliable hydraulic connection.

It is also sensible to inspect and, where necessary, replace the fitting when installing:

• New brake hoses
• Replacement rigid brake pipes
• New brake calipers
• Refurbished brake calipers
• A replacement master cylinder
• A completely restored braking system

Any evidence of brake fluid leakage around the connection requires immediate investigation.

Checks and Diagnosis

Before replacing the connection piece, inspect the surrounding braking system carefully.

Check the rigid brake pipe for corrosion or damage and inspect the flexible hose for cracking, swelling, abrasion or deterioration. Check the threads and sealing surfaces of all mating components and look for signs of brake fluid leakage.

If the brake pedal feels unusually soft or requires excessive travel, the complete hydraulic system should be checked rather than assuming the connection piece itself is responsible.

After opening the hydraulic circuit, the brake system must be correctly bled and checked for leaks before the vehicle is returned to use.

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