Rob Edwards

Yes please. Even if not elegant, it will hopefully prompt discussion of best practices for installation.

Dave928S

^^ +1 .... I'm about to install mine and some tips would help. I'm sure my neighbors will appreciate less blaspheming coming from the garage.

MrLexse

I received my slave cylinder back yesterday, so I disassembled the slave cylinder and cut the seal off the piston (after it got a "seals well") from the manufacturer, after inspection. I'm thinking my method of installing the center seal either works or it doesn't. Time to walk the walk. I took some iphone pictures of what worked for me, which I'll post, as I guess there are others out there like me, who can use all the help they can get.
Actually, this installation went much smoother than the first time and I have every confidence that this new installation will work fine. I will post pictures of what I did, but don't expect a "Wayne" pictorial.

MrLexse

Here's what we're starting with. A new seal kit and a disassembled slave cylinder
https://rennlist.com/forums/attachme...1&d=1393210926
This piston has the new seals already installed. The two "seals" on either end of the piston are wear rings and don't require an explanation to install. They are split and their orientation does not matter. Simply remove the existing two from your piston, discard them and replace with the new split rings from the kit. Their purpose, as I understand it, is to keep the piston straight in the bore, prevent rocking and take the brunt of the wear. Their function is not to seal. The center rings (an "O" ring and a Teflon seal ring) are what I am installing. I used the following professional tools:
https://rennlist.com/forums/attachme...1&d=1393211667
The first is a Craftsman 3/8" long socket. I found the outside diameter of this socket to be perfect for what I wanted it for. The smaller end was the same size as the seal ring ID and the larger end was the same size as the piston OD. The taper was smooth and the price was right.
Next, I needed something to drive the ring up the sockets shaft of the. I used a piece of 1/2" electrical conduit because that's what I had and it was close enough in size. I had to bevel the driving edge because otherwise it would stop just short of pushing the seal over the expansion part of the socket.
Here's what that looked like:
https://rennlist.com/forums/attachme...1&d=1393212214
Next, I needed something to align the wide part of the socket and the piston, so I could push the expanded ring from one to the other. I used a piece of 3/8" rod. Again, it was pretty close to what I needed and kept the alignment I needed.
https://rennlist.com/forums/attachme...1&d=1393212621
When placing the seal onto the socket make sure the ring is oriented as shown. The smaller step in the same direction as the smaller part of the socket
https://rennlist.com/forums/attachme...1&d=1393212889
Next, I placed the conduit over the small end of the socket and pushed the seal down to the part of the socket that widens.
https://rennlist.com/forums/attachme...1&d=1393213355
Now I stood the whole assembly up on the table and applied heat with a heat gun. Be very careful, as a little heat is all that is required to allow the seal to stretch onto the larger end of the socket. A hair blower would've been a better choice, turning the socket to distribute the heat evenly. Once warm, I used the conduit to push the seal onto the larger part of the socket. The seal stopped right on the edge of the larger part of the socket. I couldn't photograph the pushing because I needed one hand to hold the heat gun and the other to push the conduit. I wore gloves because the socket got hot.
https://rennlist.com/forums/attachme...1&d=1393213995
Here is the seal on the larger part of the socket, then with my hands I pushed the seal to the bottom of the socket
https://rennlist.com/forums/attachme...1&d=1393214437

MrLexse

I see all of my previous attachments came out as links instead of pictures. I'll try to manage them differently on the second half of this.
Next, we knead the seal by hand from the socket onto the piston. I found that to having the wear ring installed in the notch that you have to pass to get to the center notch eliminated any problems with the seal ring getting caught up in that notch. In the first picture below, the previously installed seal ring is still in place. I cut it out at this point, as you can see in the next picture. Don't forget to roll the "O" ring into the center groove (from the opposite side of the piston) before rolling the seal ring onto the top of it. This part of the installation is complete. The heat expanded seal ring felt loose and a little sloppy in it's groove at this point.

MrLexse

Now I'm getting groups of pictures. Oh well, were almost finished. Next the slave cylinder goes into the vise, where we drop in the spring, followed by the piston, up to the point at which the seal ring, which is expanded, stops it.
Now I took a small jewelers screwdriver and started compressing the seal ring into the bore, turning the piston as I worked the ring. I tried not to push down too hard on the piston, as it made it harder to compress the seal ring. It went in after working it around the edges for about 15 seconds. It was stiff in the bore, but able to be moved. With the piston in, it should look like the last picture. Again, with one hand turning the piston, and the other compressing the seal,, I wasn't able to take a picture.

MrLexse

Now it's just assembly. Replace the washer and the C clip and you're ready to re-install the slave cylinder.
I'm sure these methods can be improved upon, and if anyone has anything to add, correct or suggest , all input is appreciated.
To those who purchased these seal kits from me to install in the future, if you have any problem installing them, contact me.
Now I've got to figure out these "attachments".........

Schocki

Hola Lex,

your picture links in post #64 don't work. Would you be so kind and attach them again as pictures...

Thank you

MrLexse

Sorry about that. I may have to wait until tonight to get back to them.

Schocki

Ok, thank you very much !

MrLexse

I'll re-post #64, one picture at a time.
A new seal kit and a disassembled slave cylinder

Dave928S

Thanks Lex

MrLexse

This piston has the new seals already installed. The two "seals" on either end of the piston are wear rings and don't require an explanation to install. They are split and their orientation does not matter. Simply remove the existing two from your piston, discard them and replace with the new split rings from the kit. Their purpose, as I understand it, is to keep the piston straight in the bore, prevent rocking and take the brunt of the wear. Their function is not to seal. The center rings (an "O" ring and a Teflon seal ring) are what I am installing. I used the following professional tools:

MrLexse

The first is a Craftsman 3/8" long socket. I found the outside diameter of this socket to be perfect for what I wanted it for. The smaller end was the same size as the seal ring ID and the larger end was the same size as the piston OD. The taper was smooth and the price was right.
Next, I needed something to drive the ring up the sockets shaft of the. I used a piece of 1/2" electrical conduit because that's what I had and it was close enough in size. I had to bevel the driving edge because otherwise it would stop just short of pushing the seal over the expansion part of the socket.

MrLexse

Here's what that looked like: