Santa didn’t bring me the oft-requested bike maintenance skills 😉 Using the funnel + bottle approach. I know it works as I’ve seen my mate do it many times. Front is a triumph. Rear, well that’s not good at all even doing EXACTLY the same!
So
– wind adjuster all the way out
– wind servo wave screw all the way out
– remove reservoir screw on brake and screw in Shimano funnel thing. Leave bung in
– remove pads, stick yellow plastic bung in to stop pistons moving (hah, like that’s going to happen!)
– Attach tube (which finished in a sealed bottle) to rear bleed screw
– Crack open bleed screw 1/2 turn it
– remove plug from funnel.
Fluid flows for a bit then stops, pump lever, more fluid comes out and then straight back in once lever is released. Checked all connections are tight, there’s not much air being pushed through but lever comes back to bar and pistons not moving even with bleed screw closed.
Tried
– doing the old Hope/Car thing of squeeze, close bleed screw, release lever, open bleed screw
– put it all back together and start from scratch
– Syringe at caliper end with fluid in to try and bleed any air
– not opening bleed screw as much as maybe air is getting in there
– shouting at it and stroking the big hammer to show it what might happen if it doesn’t get its act together.
Whatever I do, as soon a the lever is released, the fluid rushes back into the caliper. If I put pads back in they move a bit but not enough to grab the disc.
Any ideas, before I admit defeat short term and shove a working brake off another bike on there.