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Dual reservoir single master cylinder bleeding


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Hi All,

This is probably a stupid question but I am wanting to convert my Sierra brake master cylinder dual reservoir to a fiat 19mm master cylinder with dual reservoir. Bleeding with the Sierra unit is straight forward but I’m wondering how I bleed the new proposed system using a single person gunson eazi bleed system with the new fiat based master cylinder noting that it will have two separate reservoirs.

Also, how would I connect the low fluid and brake test light switch?

Any help would be gratefully received. 

Thanks in advance

Craig

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Do you mean to use two seperate reservoirs instead of the standard one? If so I guess you will just have to bleed each one seperately, ie. rear brakes, then the fronts asuuming that is the split. You will need a switch in each reservoir to know what is going on.  

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It’s a tandem master cylinder with each line going to a separate reservoir. The master cylinder like the Sierra has three outlets; two, one each for the front and a single for the rear brakes being spit at the rear one for each side. 

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I don't know this particular master cylinder but the fact that it has dual reservoirs does it have dual pistons? (one front and one rear) if it does then it is usual to bleed the front and rear together, simply because once you get rid of the air in either the front or rear then you will only get very limited pedal travel to bleed the air from the other end. Not a problem but you may need another pair of hands.

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To my knowledge this master cylinder like the Sierra has one piston but will have two cups unless I’m mistaken. 
 

Having given this some thought I am mindful to bleed the master cylinder 1st and then bleed the callipers which then brings about is own issues as a one man job.

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