joea99
Platinum Member
I am attempting to rebuild a welded double action cylinder. 2x1.5x6 (bore/shaft/stroke). Happens to be for a WR Long bucket on a Kubota, but I doubt that matters.
I've done brake calipers before, but never something like this. Seems simple enough, except . . .
The actual piston seal seems to be a problem. The piston itself is threaded (I assume) onto the end of the rod and held on by a nut. I don't know how to install the new seal, a rather thick piece. Seems to me it is too far to stretch a seal like that to go over the lip. I thought I might get cute and fabricate a "cone" to slip over the rod and meet the outer diameter of the piston, thus to slip the little bugger over it. But still gives me enough resistance to think "this just ain't right".
I also wondered about the piston itself. I wonder if it is built as a press fit? Meaning in two pieces so as to install the seal. Seems unlikely that it could be "leak free" under such pressure, no matter how well machined. Looking it over under a magnifying glass is inconclusive.
edit: In case there was any question, yes, I would appreciate advice from those in the know . . .
Here are the bits :View attachment 505176
I've done brake calipers before, but never something like this. Seems simple enough, except . . .
The actual piston seal seems to be a problem. The piston itself is threaded (I assume) onto the end of the rod and held on by a nut. I don't know how to install the new seal, a rather thick piece. Seems to me it is too far to stretch a seal like that to go over the lip. I thought I might get cute and fabricate a "cone" to slip over the rod and meet the outer diameter of the piston, thus to slip the little bugger over it. But still gives me enough resistance to think "this just ain't right".
I also wondered about the piston itself. I wonder if it is built as a press fit? Meaning in two pieces so as to install the seal. Seems unlikely that it could be "leak free" under such pressure, no matter how well machined. Looking it over under a magnifying glass is inconclusive.
edit: In case there was any question, yes, I would appreciate advice from those in the know . . .
Here are the bits :View attachment 505176
