Bleeding brakes dual reservoir master cylinder.
#1807907
04/20/15 05:33 PM
04/20/15 05:33 PM
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Joined: Jul 2013
Posts: 1,272 Northern Calyfornua
Sxrxrnr
OP
pro stock
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OP
pro stock
Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
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Just installed a 15/16th piston MC on our 70 Challenger. Awaiting new front disc pads to arrive to replace the very soft and dirty pads currently on car.
They were being used because with any cleaner pads, I had almost no front brake action on this non power brake car converted from front drum to front disc,,,car retains rear drum.
I did bench bleed new MC very well, brakes are much better than before, but must still bleed at each wheel as likely got some air in lines when I broke them from old MC to attach to new MC,,,brakes are full pedal, very slightly spongy but still ok.
Question. While awaiting arrival of new pads, if I were to bleed only rear brakes today, are the front brakes completely and totally isolated from the rears so that if I should drive the car that I can assume that I would not be required to bleed the rears again when I bleed the fronts later.
I plan to bleed the fronts once I pull the wheels and replace the pads.
Don't believe that I had ever considered this issue before,,,,likely others have.
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Re: Bleeding brakes dual reservoir master cylinder.
[Re: Sxrxrnr]
#1809865
04/23/15 12:24 AM
04/23/15 12:24 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Question. While awaiting arrival of new pads, if I were to bleed only rear brakes today, are the front brakes completely and totally isolated from the rears so that if I should drive the car that I can assume that I would not be required to bleed the rears again when I bleed the fronts later. Correct, as said they are totally seperate, which was the intent of Ma in '67 (Model Year) with the intro of the dual bowl & therefore the dual system for better safety for as you know if one side sprung a leak you'd still have half a system whereas before that you'd have no brakes just an ebrake. Just be sure to bleed the MC first for whichever half you are working on before you bleed the 2 corners for that specific (MC) half. Put a block of wood under the pedal to keep the MC piston cups from going past thier normal travel (wear) area in the bore
live every 24 hour block of time like it's your last day on earth
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Re: Bleeding brakes dual reservoir master cylinder.
[Re: Sxrxrnr]
#1810902
04/24/15 01:24 PM
04/24/15 01:24 PM
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Joined: Jan 2003
Posts: 28,068 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,068
Irving, TX
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Wilwood builds race oriented stuff. Smaller = lighter. Lighter = better.
Worry about the ounces and the pounds take care of themselves.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Bleeding brakes dual reservoir master cylinder.
[Re: Sxrxrnr]
#1811321
04/25/15 01:14 AM
04/25/15 01:14 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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What really triggered the question was that when brake bleeding is discussed, you are always told to start with wheel most distant from from MC, which is usually RR and the LR and so forth. It would appear with dual reservoir systems that you can safely ignore this. Correct, this got burned into peoples' brains back in the years' when all 4 corners were connected (pre 67). Just be sure to bleed the MC first
live every 24 hour block of time like it's your last day on earth
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