Clutch master cylinder bleed-Accord '95

[Ragwing46]

We have just installed a new clutch master cylinder and a new clutch slave. The problem is that we can't get fluid from the resevoir to drain into the master cylinder no matter how many times we pump it pedal? so what is it? what are we doing wrong?

 

[pooksy64]

I take it you did not bench bleed the master cyl b4 putting it into the car. You have to bleed the master itself. Put the master in a vise(not in the car)/fill the reservoir/ pump the master cyl piston with your hand untill you get pure fluid coming out of the brake line ports/cap the ports off(if not capped fluid will keep surging out.) Once this is done the master is ready to be put into the car/ pull caps off brake line ports. Install brake lines and bleed the car normally so you ensure there is no air in the lines(being the fact that the brake lines were open to the atmosphere.)

or vacuum bleed.

If you put the master straight in the car and filled the reservoir, you will be there for hours trying to bleed the system.Because now the empty new master cyl encloses air cause a major air bubble in the lines. The space between the brake fluid in the lines and in the reservoir is the empty portion of the master(air bubble)
- just an FYI