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#1
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Master cylinder and brake booster diy?
My brakes on the 83 300d are less than perfect even with new rotors and pads, so i am going to change the booster and master cylinder to complete the job.
Does anyone know what the symptoms for a bad booster are versus for a bad master cylinder? My main problem is that on a hill i do not feel as if brakes are completely engaging, im leaned towards it may be the master cylinder but both parts are really old. A concern for me is cost because the booster is much more costly. Anyone have any tips? |
#2
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From your description of the problem, it sounds to me like you might be working on the wrong end of the brake system.
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#3
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New rotors, pads and sensors, purged all old fluid and air out of the system.
What else is there? Thanks |
#4
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agreed, it sounds to me like you have caliper issues.
how did your pads look? what was wrong with the rotors before you changed them. a bad booster will cause the brake pedal to be very hard to push. a bad Master Cylinder will cause the pedal to fall to the floor, without affecting stopping power, or it could give stopping power, but the pedal will not hold etc. |
#5
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The rotors were old and thinned out, the pads were also as thin as crackers, the ate calipers did seem ok to me at first sight, how can i tel if calipers were bad, there was no sign of leaking and piston seemed normal.
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#6
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Is it possible that either the rear or the front isn't working due to a bad master cylinder?
I had a master cylinder partially fail on another car I use to own. It was a dual circuit master circuit, one for the front and one circuit for the back. The back brakes essentially didn't work, so I only had half my brakes. I honestly do not know if this is possible with Mercedes master cylinders. |
#7
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Hoses are a common source of trouble.
Did you clean the calipers and lube the new pads? Any chance your bleeding job was less than 100%? Sometimes new pads and rotors will feel a little "slick" initially. |
#8
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Quote:
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#9
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Get a helper
Quote:
My understanding of the brake booster is that with out it it would just be harder to apply the brakes - no vacuum power assistance you see? |
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