international 504 couplers

[gmcdeadhead]

i want to change all the hydraulic couplers on my IH504, there all rusted and do not work well , theres two on the right and left side and two in the rear , what is the replacement for these couplers, i dont use any implements with this tractor other than a brush hog , but in case i get some implements i want those to be new and replaced already , thanks

 

[DeltaSteve]

Pioneer/ISO. The most common fitting out there. Just get the right thread. It could be 1/2 pipe,Oring, or other. Take the old with you as a sample to get the correct thread.BTW, the
'old style' IH(with the nipple) and Pioneer(with the ball) will interchange'mix and match. I have several of each,no issues hooking any up.Get them at any farm store,or implement
dealer. It doesnt have to be a'red' dealer either. Green or others will also have them in stock.