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  #1  
Old 05-15-2003, 02:48 PM
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Join Date: Aug 2001
Location: Ohio
Posts: 183
96 C280 Brake Bleeding

Hi,

Need to bleed the brakes on 96 C280. Can this be done by pumping pedal as in normal bleeding. I can restrict the travel of the brake pedal so the the master cylinder piston will not extend into area where it may be damaged by any corrosion.

Also, if I invest in a suction or pressure bleeder which is the best for this car.

Thanks
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96 C280 Mercedes
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  #2  
Old 05-15-2003, 04:45 PM
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Join Date: Jun 2002
Location: Motor City, MI
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That'll work. Or use a pressure bleeder.

I made a suction bleeder device for naught. Too much air gets sucked in past the threaded portion of the bleeder, rendering the suction bleeder useless. Perhaps someone can recommend a compound I can put on the bleeder threads to prevent this?
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  #3  
Old 05-15-2003, 06:25 PM
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Thanks

Was the suction device hand operated or a venturi type of device that would provide continuous suction? A venturi suction may have helped with the problem with air getting past the threads.

Any other members with experence with suction type devices?

If there are proplems with suction perhaps I will restrict the travel of the master c piston and flush the old way.

Many thanks
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96 C280 Mercedes
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  #4  
Old 05-15-2003, 09:35 PM
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Join Date: Feb 2002
Location: east coast
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Do a search for Speedi-Bleed pressure brake bleeder.

purchased on for my C-class, I use it every two years, the two times I have used it probably equal what I would have spent at a dealership for the same work - assuming they would actually perform the work I pay for.

I thought I read that cars with ABS prefer a pressure bleed - is this true?
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  #5  
Old 05-16-2003, 09:40 AM
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Join Date: Jun 2002
Location: Motor City, MI
Posts: 2,791
Ethan, I believe pressure bleeding is recommended over vacuum bleeding for ABS systems for the very problem I mentioned. During vacuum bleeding, there is a danger that a small bit of air that gets sucked past the threads can remain in the caliper. This bit of air can cause problems with the ABS system. I believe manufacturers actually warn against using vacuum bleeding. Otherwise I don't see a big difference between pressure bleeding and manual pumping in ABS systems.

The suction device I use is home-made and resembles a hookah. I use suction with my mouth to produce the vacuum. I find it useful for other jobs such as removing brake fluid from the master cylinder or fluid from the power steering fluid reservoir. Without the vacuum, it works well as a collection jar for bleeding the brakes.

I think air gets past the threads regardless of the vacuum source.
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  #6  
Old 05-16-2003, 02:17 PM
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Join Date: Feb 2002
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I tried using a hand-held vacuum bleeder -- and it was useless. I ended up doing it the old fashioned way (pumping the pedal). I've since bought a pressure bleeder ($44 from www.************************ ) People in this forum, and in another that I frequent (for Volvos) rave about this product. BTW, the vacuum pump cost me $30, it didn't work, and it will probably just sit under my bench for the next 50 years.

Jeff Pierce
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