O ring Madness

[SpringHollow]

Carl,

But not cold enough for a repeat of the writing in the snow incident - thank god!

Ken

 

[woodlandfarms]

Well, it all went south today.

The leak is coming from a small hose coming out of the drivers side of the tram pump. It is coming out at the brass fitting that mates with the pump itself.

First problem is that all the hex plugs that plug the empty tram holes are in the way. Second, I removed the upper brass fitting that is used to evacuate the air from the pump and it has this proprietary gasket / washer.

I called Terry, he is sending everything I need out tomorrow.

Also, I took the advice of a friend and JB welded my cracked tank. Well, that let loose today. Grumble. And my dog died. That was actually the worst part of the day.. Using the tractor I love to bury the dog I loved...

Tomorrow is a new day.

Carl

 

[woodlandfarms]

Carl,

But not cold enough for a repeat of the writing in the snow incident - thank god!

Ken

Nope snow is gone. Don't drink downstream from me, though...

 

[Wayne County Hose]

Carl,

My condolences on losing your dog. I lost mine in my house fire 2 months ago. I did find her and gave her a proper burial. I lost my absolute favorite almost 4 years ago. I still miss him.

 

[woodlandfarms]

Man... House fire... That really, really sucks. We knew it was coming, but never easy...

But, we had been looking for a boxer mix puppy for a while (so these dogs could help train it) and finally found one a couple of weeks ago (rescue dog) so we get the new pup this weekend. My life continues its never ending sense of turmoil ;-)

Carl

 

[Mickey_Fx]

Been away for a few days and this AM this thread caught my eye. My concers were soothed as soon as I saw Wayne County make his initial post. Knows more than is needed for this kind of discussion.

For those really interested, I'd suggest to contact your local industrial supplier and see if they can supply you with application books the major mfgrs publish. Alt is contact Applerubber or Parker-Hannifin, both are big names in the o'ring/seal business and have publications available.

In addtion to size, the next most important thing to know when selecting o'rings/seals is, what is the envrionment this product will come in contact with. Includes materials i.e. anything the seal is going to be coming in contact with, temp, exposure to light, arcs, etc.

If the o'ring fits into a machined recess of some kind, then o'ring x-sect become important as amount of compression is important. Material selection also come into play as various compounds are subject to different amounts of compression set. The o'ring always needs to maintain some pressure against the sealing surface. Wrong material which is not suitable for the environment may deteriorate and fail prematuraly.

Hope you get the picture I'm trying to put forth. try and get an application book so you can select the correct material for the application and there will be less chance for something to go wrong.

Durometer is the industry std for measuring the hardness of elastomers. The measurement has been around for decades. Durometer testers come in a variety of price ranges from modest to high cost. Designs vary depending upon what you are trying to measure.

Good discussion guys.

 

[Wayne County Hose]

I do need to correct myself. All fitting o-rings are 90 durometer. The generic kits are 70 durometer. Now don't kill yourself trying to find a 90 durometer kit, if you have an o-ring blown out on a fitting and all you have is a 70 durometer kit, it will probably work just fine. Just remember that if the softer o-ring blows out, you will need to get a harder one.
Another little fyi, the nitrile o-rings (buna-n) in your kit are not compatible with brake fluid. For that, you need a BUNA-S or natural rubber o-ring.