I Have bought Two master cylinders now, the original one that i had on the truck broke off the push-rod bushing, replaced the bushing and then not even two hours later broke the rod, replaced the master altogether. After replacing I bled the system the old fashion way for a good 4 hours The next day i went out and replaced the slave thinking it might be the slave cylinder. Bled it through the old fashion way for almost 9 hours to no avail, broke the master cylinder push-rod again Replaced the master with a higher quality one today and bled it through the old fashion way again for about 2 hours to no avail and this time no pressure so i went in and looked up different ways of bleeding a hydraulic clutch found one i liked better than breaking another push-rod, gravity bleeding. Tried it for about another hour, checked the pressure and i could not move the pedal, At All. So again i tried to bleed it the old fashion way and my pedal became stuck half-way through pedal movement. I looked and yet again another push-rod needs replacing . Any ideas what the problem could be? Tight on money with a baby on the way. Pictures are: Original broke in 3 pieces, second broke in 2 pieces, last one bent. PLEASE HELP!!!

 

I know this is a really old post, but did you ever solve this problem?

 

sounds to me it was something to do with clutch fork....I had similar problem and it was fork worn thru at the pivot ball