We purchased a used JD 4WD tractor a few years ago with baling wire curled to slide over the levers on the coupler body.  I asked a JD experienced friend about it.  He said that was a common way to hold the tips in on a Deere.  Never had that trouble on any of our old Internationals. 

The only thing wrong with the IH hydraulic couplers was they didn't put a lever behind the couple to pop the female coupler out so the male would engage/disengage properly. But an aftermarket manufacturer made one that worked wonderful.

I can't find one online, I may have to go take a photo of one to show it off.  It was a lever that fit behind the IH coupler body. It pivoted between the upper and lower coupler.  You pushed it forward to kick out the bottom coupler and pulled it back to kick out the top one.

It worked a LOT better than any JD coupler I have tried and was oodles and gobbs better than the ones on the Magnums.  At least on the articulated tractors you could do as was suggested above and push the coupler in and hold the hose so the tip would come out.

We never had an '86 2 WD.  We jumped from the '66 series to the '86 4WD's to the Magnums.  But I would not be afraid of a well maintained 1086.  They were the workhorse of the midwest for several years.