Brakes: 850: - How to replace the servo/brake booster?

Matthews 855 T5 · Apr 3rd, 2009, 10:14

Right, I need to replace the brake booster because it has a pin hole leaking air in.

My other post dealt with replacing the master cylinder http://www.volvoforums.org.uk/showthread.php?t=69744 and I am confident to do that.

How do I replace the brake booster/servo? Haynes says I need to go to a Volvo dealer as its too complicated.

As far as I can see I release the servo from the pedal and unbolt the servo from inside of the car. Then remove it and replace with a new sealing ring? Why does the subframe have to be lowered? There seems to be enough clearance under the bonnet. Maybe I am wrong.

Has anyone ever done it?
Thanks
Matt

Davy W · Jan 12th, 2011, 12:12

Hi Matt,

Did you change your servo in the end? I would agree with you that there looks to be enough room behing the engine to do so without dropping the subframe etc.

It is something I may well have to do too.

Regards,

Dave

Apr 3rd, 2009, 10:14	#1
Matthews 855 T5 Master Member Last Online: Jun 11th, 2024 13:29 Join Date: Dec 2006 Location: York	How to replace the servo/brake booster? Right, I need to replace the brake booster because it has a pin hole leaking air in. My other post dealt with replacing the master cylinder http://www.volvoforums.org.uk/showthread.php?t=69744 and I am confident to do that. How do I replace the brake booster/servo? Haynes says I need to go to a Volvo dealer as its too complicated. As far as I can see I release the servo from the pedal and unbolt the servo from inside of the car. Then remove it and replace with a new sealing ring? Why does the subframe have to be lowered? There seems to be enough clearance under the bonnet. Maybe I am wrong. Has anyone ever done it? Thanks Matt __________________ Get that kettle on!

Jan 12th, 2011, 12:12	#2
Davy W VOC Member Last Online: Nov 4th, 2020 12:01 Join Date: Dec 2004 Location: New Forest	Hi Matt, Did you change your servo in the end? I would agree with you that there looks to be enough room behing the engine to do so without dropping the subframe etc. It is something I may well have to do too. Regards, Dave

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