Clutch Master Cylinder problem

[San Diego GTR]

I've been trying to get my clutch system sorted and have been having some trouble. The clutch pedal goes about 1/2 way down with little resistance and then gets harder the remaining way down to the floor. I replaced the slave cylinder and that didn't help. I took the master cylinder off and it feels "gritty" when sliding the plunger in and out. It also doesn't seem to have much pressure.

Has anyone else had problems with these Girling products?

Suggestions appreciated.

Paul

[GTR One]

Air in the system is a normal cause of a soft pedal. Is it a marked change at the 1/2 way point?

[San Diego GTR]

Yeah, air in the line is bad, but I pulled 5 or 6 reservoirs full of fluid through the line with a vacuum pump. I really doubt it it air.
Paul

[GTRCLIVE]

If the Cylinder is not leaking on the floor, then I would say yes it's air somewhere...

take the slave of the gearbox and rest it on the floor (Lower than the Master cylinder then losen the bleed nipple and let it just drain out via gravity, this may help... may take a while. Or maybe pressure bleed the system with a Easy Bleed kit...

Has the car been used before is this the first build ?? is the clutch OK ??

[John1949]

Your trans is inverted. The slave will be upside down. Take it out and turn it with the bleed nut at the highest point and then bleed the system. Then place the slave back on the trans.

[San Diego GTR]

Those are all great ideas. I'm off to try them. Will report back this afternoon.
Thanks for the ideas!
Paul

[San Diego GTR]

I spent 4 hours getting the air out of the clutch and it still didn't work. Finally I figured that the pedal wasn't pushing the MC rod far enough. So I climbed down below the dash and adjusted the pedal so that it has about an inch more throw than it did before. Voila. It worked. It will take a little more to adjust it for smoother operation.
Paul