I am now beginning to wonder if this is an air issue at all anymore...
I guessed it was from the same author but it had a different "handle"Thanks Jim. I saw that too, because that is also my other thread, . I have just been trying it and I think that my slave seals are shot. I can hear air sucking into the slave with every stroke of the clutch.
Most likely will order seals before going any further.
Having spent some time working behind a JD parts counter I can state that sometimes looking up correct parts can be difficult. I was taught to always read part descriptions & footnotes. Ordering an AL37515 Piston Replacement Kit subbed to the 3 following PN'sJay Dee ordered the wrong kit. He can only order by looking at a picture and thought he got it right. Nobody in town has a seal that will match. So we took the piston off the slave to get it machined so that it will fit a regular hydraulic seal. After all this hopefully we can successfully bleed this thing.
1) You can try to bleed the slave cylinder before rebuilding it. Just put your line on the bleeder. The other end has to be submerged in fluid. Have the bleeder open a little bit. Pump oil(with the pedal) through it until you are not getting any more air. LOCK the bleeder. !!!DO not push the pedal at this time!!! IF you do you will suck the air out of the lockout cylinder and have to start all over. Leave your line on the bleeder and the end submerged.
2) Put a second line on the bleeder on the lock out cylinder. Open the bleeder THEN start pumping fluid through it until you do not see any more air. LOCK the bleeder !!Again do not push the pedal any more now!!!
3) Move back to the slave cylinder. Open the bleeder and THEN push the pedal. You may see a little more air but it should not be much less.
4) Go back to the lock out and bleed it again.
You need to move fluid and air first. If you keep pumping the cylinders they work air back and forth between them and it will take longer to bleed them. So by using the hoses you can move the fluid and air in the cylinders without moving the cylinder pistons.
Work back and forth until you are not getting any more air. Then lock both bleeders and push the clutch down. You should have full pedal now. If you don't then the slave cylinder will have to be rebuilt.To quote JD Seller's advice to me before as a reference for the reason I did this.
I put the slave cylinder back together with the new, very stiff!, hydraulic seal in place of the old seal. It is now so stiff inside the cylinder that I cannot push the piston in with my thumbs, neither can the spring push it back at me. I can move it if I step on it. Is this too tight?
While I was at it I also took off the line to the Hi-Lo interlock and sealed off both the slave and the interlock. I filled the slave cylinder with brake fluid and attached my clear hose, full of brake fluid, to the bleed screw with the other end in a jar, submersed in fluid. The jar is slightly lower than the bleed, with a hump in between them that is higher than both ends. I ensured that the reservoir was full and opened the bleed a 1/3 turn. Instantly bubbles started to emerge from the bleed and caught in the hump.
I slowly depressed the clutch and got a horde of bubbles with virtually no fluid. The air forced all the fluid in my hose out the end, so when I went to slowly release the clutch I sucked a hose-full of air back into the slave! I tried again, but this time I filled the hose with fluid again before I released the clutch. I sucked no air back this time, but when I checked the fluid level in the reservoir the level had not gone down. I have done this 5 times now and have seen no fluid drop.
The good news is that I cannot hear air being sucked past the slave seals anymore!
I also noticed, however, that if I leave the whole setup alone with the pedal up that it will slowly gravity-feed down and out the whole system. The fluid in the reservoir goes down, and I can see air bubbles slowly coming up thru the fluid in the jar.
So, I am wondering a couple of things. I am thinking that pumping the pedal as I am is not working. So, perhaps I need to raise the jar above the slave, switch it out for a large funnel, switch out for a bigger hose, and fill the funnel with fluid. I wonder if that would help keep the air up away from the bleed and the hose full of fluid. This will not help the level in the reservoir go down, tho.
I am also wondering if I should somehow add to the reservoir to make it alot higher in an attempt to gravity-bleed the whole system from the top. I am afraid that this method will be too slow and leave air pockets in the bends and in the cylinders. I am no longer sure where all my air might be, so I am assuming that I have air everywhere.
I am also wondering if I can make a home-made version of your pressure-tank bleeding system. I'll look into it, but not sure if I can.
So, now that I have written a book I am awaiting advice!