SubseaSports
Contributor
I had a basket case R4 that I have let sit for a couple of years now because both diaphragms were crunchy. Well, actually 3 because the HP diaphragm was shot as well.
Thanks to @James79 I have a new main diaphragm. I have cut and punched a new HP diaphragm out of EPDM. Only buggered one up, so I am ahead. I think it turned out well.
The LP seat was very hard. So, I thought about making a seat that I would be able change easily. I removed the old seat and flattened the dome on the lever. Then, drilled a hole in the lever. I turned a LP seat pocket and pressed it the hole. Undecided if press fit is enough [very tight fit] with the post on the other side melted. I have another one cut that I plan on threading and using a nut to retain. This will pressed fit as well.
The downside to new seat is it closes the gap between seat and orifice. I will have to turn the lp orifice down a bit. Lathe is down at the moment, so should have it done next week. Worst case, I can remake the original one if I have problems.
Thanks to @James79 I have a new main diaphragm. I have cut and punched a new HP diaphragm out of EPDM. Only buggered one up, so I am ahead. I think it turned out well.
The LP seat was very hard. So, I thought about making a seat that I would be able change easily. I removed the old seat and flattened the dome on the lever. Then, drilled a hole in the lever. I turned a LP seat pocket and pressed it the hole. Undecided if press fit is enough [very tight fit] with the post on the other side melted. I have another one cut that I plan on threading and using a nut to retain. This will pressed fit as well.
The downside to new seat is it closes the gap between seat and orifice. I will have to turn the lp orifice down a bit. Lathe is down at the moment, so should have it done next week. Worst case, I can remake the original one if I have problems.