Brake bleeding issues
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  1. #1
    Official RnS Addict Stroprock's Avatar
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    Brake bleeding issues

    Having trouble bleeding brakes. I seem to have all the air out on all wheels, but the pedal still has loads of empty travel before it starts to slow the wheels, and it isn't effective enough either, slowing but not stopping the wheels. I have the pedal so in the un-pressed position, the MC is fully out. I was wondering if perhaps the rod isn't going in far enough, and I need to redesign the pedal. Or is more likely a problem of air still in the system?

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    Official RnS Addict Bel Air Lugosi's Avatar
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    What brakes has it got? Are all the bleed nipples at the top? Air rises and if the pipes go in at the top, and your bleed nipples are at the bottom air gets trapped and you cant shift it.
    I had this happen on a volvo rear end. Worth checking.
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    Official RnS Addict stevie.t's Avatar
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    if you pump the pedal dose it get any fimer? before you bleed the brake's did the master cylinder bottom out before the pedal hit the floor, are the brakes adjusted, what size m/c are you using ? is it disc/drum or disc/disc, or all drum,s? need mor imfo on what you have

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    Official RnS Addict Stroprock's Avatar
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    Sorry, its Triumph Spitfire front brakes and MC, and reliant rear brakes (drums). The brake master cylinder is 5/8" bore. It starts to go hard after 1/2" of movemment. The bleed nipples on the calipers (front) are on top. Yes, it gets firmer when you pump, so I guess that indicates air in the system still.

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    Rods 'n' Sods Junkie
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    Assuming your master cylinder is above your cylinders/calipers gravity bleeding never seems to fail ..so its master cylinder top off then open the bleed nipples one at a time and let the fluid drain into a container for a few minutes (keep an eye on the m cylinder level ..top up with the fluid youve drained into a clean container) .go round all the nipples and jobs a good 'un.

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    "Mr Fiddler" stevetoxic's Avatar
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    I had a similar problem with my Chevy Truck...turned out I had'nt bled the master cylinder before I started on the brakes.
    just a thought.

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    Official RnS Addict beach57's Avatar
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    Have you the valve for the drums fitted in the master.

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    Official RnS Addict Stroprock's Avatar
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    Quote Originally Posted by paul67 View Post
    Have you the valve for the drums fitted in the master.
    You mean the proportioning/combination valve?

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    Lost in the ozone. . .... malc's Avatar
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    Quote Originally Posted by stevetoxic View Post
    I had a similar problem with my Chevy Truck...turned out I had'nt bled the master cylinder before I started on the brakes.
    just a thought.
    My first thought as well, the MC needs bleedin´.

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    Official RnS Addict mygasser's Avatar
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    Quote Originally Posted by stevetoxic View Post
    I had a similar problem with my Chevy Truck...turned out I had'nt bled the master cylinder before I started on the brakes.
    just a thought.
    i made that mistake once. i jammed the pedal down hard overnight and the air had risen back to the reservoir by the morning. saved taking it all apart to bleed the master then all the 4 corners again.
    need a job done on your project? i may be able to help.

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