What do you make of this then. One of the rear brakes on my Lancia is not working properly. With the handbrake fully on, I can grab the wheel and turn it. With the footbrake on, I can still turn it (though I need an 18-inch lever to do it). Brake performance is just low on that one wheel. Here is what I have done so far to get to the bottom of it.
1) remove caliper, check piston is not seized (its good as new), replace with new pads and cleaned/greased-up sliders.
2) remove caliper again and dismantle/inspect in-caliper handbrake mechanism - perfect working order.
3) remove disc and check for rust, wear, scoring and so on. None found, disc looks in vgc.
4) check handbrake cable for seizure (its not seized at all)
5) check brake hose for blockage - no problem here.
6) bleed several times. Pedal is spot-on.
7) remove disc and polish with 180 grade wet and dry and WD-40 to remove any 'glaze'. Clean with thinners and refit. Gently rough up pads taking care to ingest all possible dust, and refit.
8) drive up and down the road a few times with the handbrake partially on to 'bed in' the pads.
Despite all this, the brake is just not up to scratch, neither hand nor footbrake.
Last night I noticed that the brake disc has got a 'warp' on it, quite a bad one, must be 2-3mm of sideways 'wap' on it easily, so I have ordered up a new set of discs. However I don't really see how this is going to cure low brake performance.
1) remove caliper, check piston is not seized (its good as new), replace with new pads and cleaned/greased-up sliders.
2) remove caliper again and dismantle/inspect in-caliper handbrake mechanism - perfect working order.
3) remove disc and check for rust, wear, scoring and so on. None found, disc looks in vgc.
4) check handbrake cable for seizure (its not seized at all)
5) check brake hose for blockage - no problem here.
6) bleed several times. Pedal is spot-on.
7) remove disc and polish with 180 grade wet and dry and WD-40 to remove any 'glaze'. Clean with thinners and refit. Gently rough up pads taking care to ingest all possible dust, and refit.
8) drive up and down the road a few times with the handbrake partially on to 'bed in' the pads.
Despite all this, the brake is just not up to scratch, neither hand nor footbrake.
Last night I noticed that the brake disc has got a 'warp' on it, quite a bad one, must be 2-3mm of sideways 'wap' on it easily, so I have ordered up a new set of discs. However I don't really see how this is going to cure low brake performance.
