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

Help!!!!!!:)

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

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.:confused:

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