Volvo: Pirates of the Sea?

[JamesG161]

Measure the groove that the seal fits in. Then go to an o-seal supplier and look at their technical information to get the seal size. I am assuming this is a face seal so a set of vernier or dial calipers can get you the dimensions. This is a low pressure application so not that much squeeze is needed but if you use a seal too big for the groove there is nowhere for the material to go when you compress it. The seal needs to be the right cross section for the width of the groove. Use a little Vaseline to hold it in place as you install it so the seal doesn't pop out of the groove and get cut when you tighten up the plate. Here's a paper to study up on seal design that will help. No need to get robbed in this case, the test is this Friday so study hard.

The diameter of the ring or close to it or a bit smaller cord diameter is ok for this low pressure service (my guess less than 10 psi).

Buy a cheap ring a bit longer or bigger ring diameter ( not the cord diameter).
Do the following...
1) Cut old and new oversized diameter ring
2) Cut the new ring to about 1/8th inch longer than the old one.
3) Put the new ring ends together (overlapping the eighth inch) and cut through the overlap with a very sharp knife to assure flat even mating surfaces.
4) Put a drop of Super Glue on one end then mate the ends to form the circle.
5) Count to 5
6) Done and ready to go. No Kidding!!!

I had a US Navy maintenance technician show me this and I was astonished. He said try to pull the new ring apart. It was solid! He told me that the Navy never has the right size O-Rings and they always did this method.
OR...
Buy this...
http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=1AD6MYWWRWS3DZBQWNBZ

Close to VP ring prices and makes any size ring for may $1.00 USD each.
Jim...

 

[Rich Stidger]

The diameter of the ring or close to it or a bit smaller cord diameter is ok for this low pressure service (my guess less than 10 psi).

Close to VP ring prices and makes any size ring for may $1.00 USD each.
Jim...

Great tip Jim! Thank you. I now have a plan "B".

 

[jibes138]

I've actually made o-seals using the cut and glue method. It was a long time ago thanks for the memory. It works well we would use it for leak test or pressure test fixtures.