I was about to post the same thing. That is definitely a square o-ring. You need to go to a hydraulic shop for a replacement. Not a auto parts or plumbing parts store. The hydraulic shop can usually source the correct one for under $10(including shipping to your island, about the same as my island)

 

If your mechanic can get an accurate measurement with calipers, ID, OD, cross section size, I can probably find you one here in Atlanta and mail it to you.

 

I have extra top plate seals I can send you for free. They are from rebuilds, but never leaked. PM me if you want it.

 

yes, Walt. It is a square O ring. BTW do you have a front right window channel for me? How's the city? I miss it. My Rover does not.

I think I should get the proper O ring as well. If I find it then I will have a perfectly new box I believe. I may be optimistic but I think the rest of it is fine.

Even with my Mitutoyo Digital Calipter (don't ask) it's pretty hard to accurately measure a rubber O ring and the new one is too small but the old one surely has morphed since it was made.

Savannah, hilarious you know Casa de Tornillo (house of screws - hot bordello). I was there last week looking for stuff. I've been to a far range of places lookin' for it here.

 

...thanks guys...ill try to measure it and identify it and then let's see what we can do.

 

Make sure you get the correct material as well. With power steering, trans and hyd fluid you will need a buna-n seal which is very common. I have 100s of thousands of square cut o-rings in stock but only in about 15-20 sizes. If you have the measurements; I can see if I have anything and if not I will see if I can get what you need. McMaster is an excellent resource if they will ship to you,

Most jewlery stores have a tool to size rings that works well to assist with measuring orings: slide your o-ring on the tool and measure where it stops.

Todd

 

Maybe a longshot here but do you have a construction equipment dealership near you (caterpillar, etc...)? That is a D-ring and they are commonly used on their hydraulic pumps in thousands of sizes. They may be able to match one up for you in their service/parts department.

 

i would suggest you are wasting your time measuring the o ring itself, i would measure up the groove width, internal diameter (ID), the housing dia (OD) and give those measurements to a industrial seal/hydraulic shop, they can, from the those measurements, figure out the correct size ring for the job, all seals/o rings or what ever have very specific crush sizes for it to do the job correctly (not leak) you have a old steering box there i gather so measure that.

cheers

Pedronz