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  #1  
Old 03-18-2003, 07:52 PM
Plantman's Avatar
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Location: Miami
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85300 SD brake booster

Well it looks like my brake booster is going.

My brakes are getting harder and harder. This has menat booster failure in all other cars I have had.

I checked the vacuum supply line and all vacuum lines in vicinity and all looks well.

Additionally, I hear no leaks, so I have determined it is the booster. Any thoughts?

I figure the master cylinder is ok since it doesn't leak any fluid.

Any special procedures to replacing the booster?

Thanks

Plantman
1985 300SD
179,000 miles

Last edited by Plantman; 03-18-2003 at 09:20 PM.
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  #2  
Old 03-18-2003, 11:49 PM
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Help!!!!!!
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Old 03-19-2003, 04:06 PM
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smoke gets in your eyes
 
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How do you know it's not the vacuum pump? How much vacuum do you get at idle?

Sixto
91 300SE
87 300SDL
83 300SD
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  #4  
Old 03-19-2003, 06:51 PM
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That's a good question.


I have no idea nor do I have the prper tools to check. I assumed it's the booster and not the pump because all other vacuum related items work fine.
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  #5  
Old 03-19-2003, 07:02 PM
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smoke gets in your eyes
 
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It could also be a bad check valve in the line between the vacuum pump and the booster. That should be easy to check.

Sixto
91 300SE
87 300SDL
83 300SD
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