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Introduction

If your Volvo 240's brake pedal is especially soft or loses pressure while you're holding the brakes, it could be a bad seal in the master cylinder.

Outils

Pièces

  1. 1986-1993 Volvo 240 Brake Master Cylinder Replacement, Brake Master Cylinder: étape 1, image 1 de 1
    • The brake master cylinder is located directly underneath the brake fluid reservoir near the driver side of the engine bay.

  2. 1986-1993 Volvo 240 Brake Master Cylinder Replacement: étape 2, image 1 de 3 1986-1993 Volvo 240 Brake Master Cylinder Replacement: étape 2, image 2 de 3 1986-1993 Volvo 240 Brake Master Cylinder Replacement: étape 2, image 3 de 3
    • Twist the brake fluid reservoir cap counterclockwise and remove it.

    • Remove as much brake fluid from the reservoir as possible by sticking a clean rag inside the reservoir.

    • When you remove the rag, be sure not to place it on any painted or plastic surfaces. Brake fluid will strip paint and deteriorate plastic.

  3. 1986-1993 Volvo 240 Brake Master Cylinder Replacement: étape 3, image 1 de 2 1986-1993 Volvo 240 Brake Master Cylinder Replacement: étape 3, image 2 de 2
    • If your brake fluid reservoir has a fluid level sensor, disconnect it by pressing down on the plastic tab and pulling the connector straight out of its socket.

  4. 1986-1993 Volvo 240 Brake Master Cylinder Replacement: étape 4, image 1 de 1
    • Use a 10 mm open end wrench to disconnect the two brake lines from the master cylinder.

    • There were still be fluid in the master cylinder that will drip out of the connections; this is normal. Use a clean rag to clean up any dripping fluid.

  5. 1986-1993 Volvo 240 Brake Master Cylinder Replacement: étape 5, image 1 de 2 1986-1993 Volvo 240 Brake Master Cylinder Replacement: étape 5, image 2 de 2
    • Use an open end or socket wrench to remove the 17 mm nuts on either side of the master cylinder that attach it to the brake booster.

    • Remove the brake master cylinder, taking care not to damage or bend the brake lines.

Conclusion

To reassemble your device, follow these instructions in reverse order.

Don't forget to flush & bleed with new brake fluid! (separate how-to required)

5 autres ont terminé cette réparation.

David Hodson

Membre depuis le 13/04/2010

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3 commentaires

Thanks this was great. Additional instructions are required about how to disconnect the reservoir from the master cylinder. I've broken so many plastic bits on my Volvo that I was scared to really put much force into getting the reservoir off. I kept thinking "There must be a trick..." but no there's no trick you just have to pull really hard while doing your best to not damage the reservoir. Could have saved me some time as I stared at it wondering what the "trick" could be.

There's also a plug on one side of the old master cylinder that you will need to take out and put on your new one.

Thanks again for posting these instrux.

Brant Louck - Réponse

Thanks very much David Hopson & very helpful.

M. T Lam - Réponse

David! Can you help!? Just got a 1991 Volvo 240 and the brakes went, just as you described. You mention that it is common with the 240? Can you elaborate?

Tracy Murphy - Réponse

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