After 4 years I finally got the fix for my 3 point hitch/remotes issue. 

Back in 2008 I posted up an issue with my 3 point hitch and remotes on my 1800 series B. The lift didn't work when I purchased the tractor, wasn't an issue as I don't own any implements that require a category II or III anyway, not to mention it had no links and arms. I had just replaced my rockshaft housing (when I bought the tractor the casting was broken where the rear left remote screwed in, JB weld took care of the leak, but eventually it started to seep out again, hence the replacement of the entire assembly). I bought the links and arms while I was at the salvage yard getting the housing. Of course, I got a crash course in hydraulics and power beyond. I put it all together and still nothing worked, until I found out that the housing I put on was set up for power beyond. Took out the plug, got the remotes to work, still no lift.  I put everything back on that I took off, including a line that was between the top of the hydraulic unit to the top of the operators platform. I experimented with removing this &quot;bypass&quot; line, got the hitch to work, but then lost remotes. I could retract my lift cylinder, but not extend it. I checked the interlocks, both sides screwed in as far as they would go. Put the tube back on and forgot about it, I had use of the remotes, all I needed anyway. (I do hay)

Fast forward:
I just happened to be grilling dinner the other evening (my grill is just outside the barn/shop) and while I was waiting for things to cook I grabbed myself some good reading material.. a 1800 series operators manual. I read the section about single action cylinders and the interlocks. It got me to thinking...

I went to the right interlock, and again I tried turning it in, it wouldn't go any further, but upon comparison with the left, I noted it couldn't be in all the way. How I over looked that before...  So I removed it. Once it was out, I found that the threads were rusted over on the bottom side of the screw preventing me from turning it in any further. A good soaking in oil and a wire wheel cleaned it right up. I screwed it in all the way, started tractor, but still no luck. The operators manual shows a line with a valve installed in it, which would be used with a single action cylinder to prevent cylinder creep. I &quot;had&quot; a line/tube on my tractor in the location shown in the manual, but with no valve, it looks factory, and no doubt was performing the same function. Same line I experimented with before, just didn't know it's function. I removed it, capped and plugged the ports for it. The lift and remotes work good now. I only had to make a small adjustment to prevent the 3 point from pulsing when all the way up.

Back in 2008, had I compared how far the screws were set in I might've discovered the fix by accident. May not have learned anything either. It was reading over the section in the operators manual that got me thinking. All it took was a turn of a screw...