Quick Another Question on Master Cylinders!

[Beatles65]

I got the rebuild kit and put it into the master cylinder but now I am having trouble with not getting any fluid past the piston. There is a rubber seal that goes in between the piston and the spring and that is not allowing fluid to go past. There are two drilled out holes in the fluid resevour, one allows fluid to go to the piston camber and then theres another, is that suppost to be a drain for behind that cylinder to allow fluid to go to the lines? The second whole looks like its plugged up, am I correct on this? I just cant seem to get fluid to go past the piston to the lines.

Photo 1 show the old that came out.

Photo 2 shows you what im talking about.

Photo 4 shows the cleft in that rubber seal, the new one did not have that.

If anyone could get me an answer quick that would be great! We've got two days to my sisters wedding and we need to get this on the road to use it then!

Thanks!

[Niel Hoback]

That is a malformed cup you have there. That cup is supposed to seal around the edges to force fluid through the lines. A new cup will be perfectly round. That old one looks like it was in contaminated fluid or something that caused it to buckle inward. At any rate, no it must be perfectly round with a sharp wpier edge to work.

[Niel Hoback]

I forgot, both holes have to be open. Clean them good with a wire.