Thread: NO to little BRAKES
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Old Mar 14, 2016 | 04:45 PM
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onehundred80
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From: Ontario
Default Re: NO to little BRAKES
Originally Posted by velociabstract
My first action would be to change the fluid. My brake pedal would go to the floor board and hardly stop when I got air into the lines. One time I only had rear brakes but that was from boiling the fluid repeatedly in the front calipers. Felt/is the same as air in the lines, pedal to the floor and almost no brakes at all. I've never had a master cylinder fail and don't know the symptoms but it sounds plausible too.

Les
Front and rear seals in the MC would have to go but an old car sitting, who knows. No wheel cylinder leak seen but ...?
Old fluid is a distinct possibility as noted, the extra force of the booster might make the seals leak easier.
The pistons inside the MC must get pushed as that part is mechanically linked. So if the pistons move the oil has to move somewhere. Low fluid in the reservoir would allow air to get pushed around, but that should be seen easily.
 
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