The hydraulic block on the tractor requires a 7/8"-14 "90 Duro" O-ring fitting.
The standard female coupler from the factory is pictured. If it have international stamped on the collar, it is a safeway adapter. This will accept safeway and pioneer style male couplers.
If you were able to remove the adapter from the female coupler, it is just a 7/8"-14 x 7/8"-14, 90-Duro O-Ring adapter.
I'm still unclear what you're trying to replace or why, so I'll cover both. You can get both the 90 Duro O-ring and the internal 70 duro O-ring inside the female coupler if either of those leak. If you need a new Female coupler CNH 374780R92 is the only one I've been able to find. You will need to use the 7/8"-14 x 7/8"-14, 90-Duro O-Ring adapter as the coupler is female thread. If you can't find the factory replacement, you can use a straight adapter 7/8 O-ring to pipe. These are expensive puppies, so I just replace them with OEM.
If you can't get them to mate, A NPT standard pipe (what ever your loader hose requires) to safeway/pioneer coupler will work, as pictured above.
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Today's Featured Article - Trailering Your Tractor - by Curtis Von Fange. One of the fun things of summer and fall are the parades and tractor shows that go on across America. Many owners of tractors travel long distances to attend these shows and they usually take their restored iron along with them. Safe trailering practices and inspections will ensure that the event is a fun one. A good habit to develop when using a trailer is to give that �quick look over� before taking it on a trip. Before hooking up to it check the tongue for proper operation. The latche
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