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Hi Dean. It's a good idea to stretch the O ring a little so it fits tight
in the groove. I got my info from Parker and it's too loose. It just kind of
lays in there, and pops out. The sales rep gave me the groove dimensions for the
hatch, and I just knew something didn't feel right. The groove is a
little larger than the ring, but only a few thousands, per the Parker
chart.
I'm going to get another O ring made, just a little smaller. (
cheapest fix for now ) In the mean time, I added a little rubber cement to
hold the O ring in. It stays but I would recommend a slight dove tail on the
inside vertical face of the groove. That way the O ring stays put. The Parker
catalogue shows a groove like that. The inside face is tapered at about 5
degrees. Not much, but it's enough to hold the ring securely. The groove is a
little more expensive to cut, but well worth the extra cost. I'm using a 1/4
inch O ring and maybe later will have the groove re cut with the tapered edge,
and use a 5/16 O ring. I'm going to get this thing wet first, and see if it
holds. The hatch doesn't fit well on a lathe, so it takes a lot of set-up to get
the groove cut ( or re-cut ) so I'm going with what I've got for now. The
important part is the finish in the groove and on the opposite face. It's got to
be smooth and flat. Get all the input you can before committing to the actual
cut. It's a pain in the ass to be looking for a fix, for something this
simple. Frank D. Create a Home Theater Like the Pros. Watch the video on AOL Home. |