I've dissassembled and cleaned my two master brake cylinders..Scott...for my '46 Cub. The master cylinders are slightly different. One has three threaded holes, one on the top for the fill plug, one on the bottom that goes to the brake line, and one coming right out of the middle facing forward. The other master has only the fill and brake line holes in it, top and bottom. The first one I mentioned I can plug the front, forward facing hole. It may be from anther J series or PA18???
The other bothersome thing is that there is a spring internal to the master cylinder that on one of my masters has a nice phenolic and smooth "plug" in one end that presses on the forward face of the master diaphragm. The other master has a slightly cupped metal "plug" on the end of the spring that rests against the forward face of the diaphragm. The concave surface is the surface that faces the diaphragm.
Can anyone help me out on the differences with these two master cylinders. Perhaps there is someone who has the proper smooth phenolic plug that fits on the spring they can sell me, or perhaps there is someone who would like my "3 hole" master and would trade it for the proper two hole.
Any and all comments and information on this "one of many" mysteries with my airplane would be welcome.
The other bothersome thing is that there is a spring internal to the master cylinder that on one of my masters has a nice phenolic and smooth "plug" in one end that presses on the forward face of the master diaphragm. The other master has a slightly cupped metal "plug" on the end of the spring that rests against the forward face of the diaphragm. The concave surface is the surface that faces the diaphragm.
Can anyone help me out on the differences with these two master cylinders. Perhaps there is someone who has the proper smooth phenolic plug that fits on the spring they can sell me, or perhaps there is someone who would like my "3 hole" master and would trade it for the proper two hole.
Any and all comments and information on this "one of many" mysteries with my airplane would be welcome.
