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Bleeding Master Cylinder 

 

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 Post subject: Bleeding Master Cylinder
Posted: Sat Jan 27, 2007 6:54 pm 
Getting Side Ways
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I replaced my front pads and replaced all my brake fluid, i also detatched the master cylinder for cleaning. How do I bleed the master cylinder as sometimes wen i push the brak pedal in bubbles appear in the master cylinder.

Also how do I bleed the ABS

 

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Posted: Sat Jan 27, 2007 7:15 pm 
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just liek any other car

start from the furtherst point

ie bleed passenger rear
drivers rear
passenger front
drivers front

in that order

the fluid will travel through the abs system so nothing else is needed

 

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Posted: Sat Jan 27, 2007 8:26 pm 
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You may find that the brake master cyl is worn & bypassing inside. When new brake fluid is put in an old system, it will lift old scale and scum in the system, and interfere with small holes in the master cyl, like the reaction ports.

 

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Posted: Sun Jan 28, 2007 4:35 am 
Getting Side Ways
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Disco Frank wrote:
just liek any other car

start from the furtherst point

ie bleed passenger rear
drivers rear
passenger front
drivers front

in that order

the fluid will travel through the abs system so nothing else is needed


well that answered my ABS question but what about the master cylinder releasing air bubbles occaisionaly

 

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Posted: Sun Jan 28, 2007 4:45 am 
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u sure it is air? and not brake fluid?

if the system has been bled correctly there should be no air in it

 

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Posted: Sun Jan 28, 2007 4:48 pm 
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i bled the 4 nipples at the wheels so that is fine but i think that there is some air in the master cylinder sumwhere

 

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Posted: Sun Jan 28, 2007 8:55 pm 
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If the master is buggered, it can suck air from the seal at the rear of the master. I'd say its stuffed. Replace it. If you do, bleed it first, have a mate push the pedal, while you have your fingers over the holes, so as to fill the cyl completely. Use truckwash (watered down 5:1), to wash off the spilt brake fluid. Then hook up the pipes, and bleed at the wheels.

 

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