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TR2/3/3A 59 tr3a - brakes

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M

midnight

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I seem to have an issue with my brakes - I have bleed them three times and still have air in the system - I have no fluid leakes - all new parts - any suggestion where to start looking - I am considering the master cylinder - midnight
 
Are you actually getting air out when you bleed? Or is the pedal just soft?

If you are getting air, check first that the pedal is returning far enough to leave some freeplay at the master cylinder pushrod. ISTR the book calls for .010", but it just has to be some. If that is OK, then I'd suspect a problem with the MC. Seems like there was someone else on here last year with the same problem, and a replacement MC solved it; but I may be misremembering the details.
 
Why are you having to bleed them -- if it is because you just installed a dry master cylinder (either a new part of one you rebuilt) you may have some difficulty getting to want to bleed. Some bench-bleed these before installing but I have always been able to get things moving by either cracking open the outlet line at the M/C or using a pressure bleeder.
 
Randall - I get air, ongoing, while bleeding - I can't seem to be free of air bubbles - I will check the pedal free play, but, I suspect the problem is with the MC - thanks - Midnight
 
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