• bleed port on the lever is leaking

    Right, I don't suppose you keep that Klein in the parts bin? You have my address yeah? :)

    Leaky bleed port would maybe explain why some of the pistons weren't moving when the lever was pulled. Oil/air being displaced out through the bleed port instead of moving the pistons?

  • Leaky bleed port would maybe explain why some of the pistons weren't moving when the lever was pulled. Oil/air being displaced out through the bleed port instead of moving the pistons?

    At a guess I'd say that what's happening is that when the inner pistons are in their bore the resistance to initial movement is greater than the resistance of the seals in the bleed screws, so fluid pushes past them. When the pistons are started out of their bores then the resistance of the seals is slightly greater than that of the piston, so the piston moves.

    And whatever the position of the pistons in their respective bores, moving both at the same time is always a greater resistance than the seals in the bleed screws.

  • At a guess I'd say that what's happening is that when the inner pistons are in their bore the resistance to initial movement is greater than the resistance of the seals in the bleed screws, so fluid pushes past them. When the pistons are started out of their bores then the resistance of the seals is slightly greater than that of the piston, so the piston moves.

    And whatever the position of the pistons in their respective bores, moving both at the same time is always a greater resistance than the seals in the bleed screws.

    Yeah I'm nodding my head in agreement here.

    The lever thats leaking is the new one?
    Your patience with these is commendable, I'd have had a complete melt down by now.
    I don't think it too much to ask that top shelf brakes should be able to go 6 months at the very least without having to be bled or fucked about with.

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