I have a 1999 f-250 with a 6 speed. The other day when I depressed the clutch pedal it went to the floor. I was told my master cylinder was bad. I replaced the master with no luck. I do know it is between the master and the slave because I have the slave out and it still happens. Is there any way to bleed this? I have not taken the slave off or replaced it but what else could be wrong?

 

Was the clutch pedal really stiff before it failed?
Other than not having the new cylinders properly bled out, the only thing left is the clutch fork has a track record of bending under pressure and the only cure is to remove the transmission and replace the offending parts.
I have some pictures in one of my galleries of the transmission removal. It's a very easy job if you have a jack. Everything is huge, heavy, cumbersome, but very easy to get at.

 

The pedal was not stiff it just went to the floor by itself. I do not think it is the clutch fork as I have the slave pulled out of the transmission and the pedal still goes to the floor on its own after I press on it a little. How do you bleed it? There is no bleed screw on the slave or the master cylinder? thanks for your help.

 

There's not a way to bleed the system. You're better off buying the pre-bled master/slave kit from Ford and replacing the whole thing.

 

My ford dealer does not list a prebled unit.

 

I had the same problem with my previous truck,6 speed, Ford does offer a prebled unit(tubing , master cylinder, slave cylinder). I replaced tubing and all, fixed the problem. Whole thing comes out in one piece.

 

I bought mine from Ford 2 months ago so I know they still sell them. I'll see if I can find a part number for you.

 

Well, SOMEBODY has to get them bled out in the first place!
Basically what you have to do to get them bled out is to have the whole assembly in your hand with the slave being the low point. Perhaps have the master cylinder mounted in the bench vise. (Gently of course) Fill the reservoir with fluid and work the air out of the system by exersizing the slave cylinder fully. Repeat until no more bubbles rise up.

 

Sorry Kwik,I meant since there is no bleed valve it is very difficult to properly bleed the system, and everyone I have heard that has tried it has had problems. Not impossible, but difficult. It's much easier to buy the entire plug and play system.

 

OK I believe the Ford part number is 2c3z7c522A or you can try this link for bleeding instructions. http://www.carolinaclutch.com/conten...aulic.htm.aspx

Good Luck.

 

Yes you can. Click on the link below and go ot page 28. BTW book mark the whole site becuase there is a ton of info , and troubleshooting instructions on that site. Have fun. Its worth the try bleeding it.

http://www.zf.com/na/content/media/i...ide/S6-650.pdf

 

so there is no way to bleed out any air in the system that might have entered when doing the install?

 

Yeah there is, but it's a really lame design IMO.
EVERY VW and Audi that I work on that has a hydraulic clutch has a bleeder valve on the slave cylinder so you can flush it out. I do that with every brake fluid flush. Do the brakes and then the clutch hydraulics. It make a very noticable difference in pedal quality to get nice fresh fluid in the system, even if there were no customer complaints about that part of the car. I just do it as a matter of routine for maintainance.
Not so with Ford. You have to take the whole assembly out of the truck and hold the slave cylinder straight down below the master cylinder and push the slave cylinder in and out, working all the bubbles up through the pressure pipe and out through the back of the clutch master cylinder.
Then you have to carefully install it back in the truck, making sure that you don't do anything that will introduce air back into the system.

EDIT, upon thinking about that whole procedure, you could probably just remove the clutch slave cylinder from the transmission and do that procedure from underneath the truck, without having to remove the master cylinder from the truck. Just don't get dripped on by an overflowing reservoir.

 

It s very simple to bleed with the unit installed in the truck. remove the slave from the bell housing and push the rod in and let it return back out. repeat this about 20-25 times. reinstall slave and top off master. Iv'e done mine twice that way. Barney

 

Sounds good, Barney, thanks.
Makes me want to separate the two, get the old fluid out and refill it. I'm still running the same factory installed cylinders from when the truck was new and I'm starting to get a little paranoid about rotting seals.