O-Ring Help

[insaneranger]

I'm sure it's been asked many times, but my pump is leaking where the pressure fitting threads into the pump & I'm having a hard time finding the correct size o-ring for my power steering pump. Non of the o-rings that comes in the rebuilt kit are even close. I've contacted a couple Ford parts dealers & they have no idea or part numbers to reference. Any help would be appreciated. I've included pics with arrows pointing to the exact seal I need. Thanks.

 

[Dirtman]

Was that originally actually an O-ring? Meaning it was once round and is now that shape from wear?

If so just measure it and buy one that size from McMaster, or grab a universal O-ring kit from someplace like harbor freight. If it is suppose to be that shape, I have no idea.

 

[insaneranger]

I'm not sure. It's flattened out & cone shaped on one side. The new seal kit came with o-rings so I assumed this took one too. I have a local Tractor Supply so I may check there. I just wasn't sure if it had to be a "perfect" fit or just something that's close enough.

Here's a better look at the shape it's become. It looks like it was molded this way. I'm going to have to replace the high pressure hose too. Whoever installed the pressure hose must have used vise grips because the nut is oval and cracked all the way around. Good thing I noticed the puddle of fluid under my truck before I got in today.