AC D17 3 Pt Lift Problem

Friend got a new to him D17, got it running pretty good, but the 3pt lift goes up, but can't get it to go back down.

I have always had Fords so I'm new to troubleshooting the AC.

Any Help will be appreciated, I will post some pictures this evening.
 
Here are the pics of the tractor, not sure what year/series it is.

Like I said, not familiar with the AC Tractors yet.

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28EEB012-95F6-4906-9D7E-CA61C92D1F65_zpsaqsfpkdl.jpg

03506535-5320-40E6-A97B-FDB888253600_zpsdaaffvjh.jpg
 
Do the arms go down when the tractor isn't running? If so I'd check out the tractor booster linkage.Thats the lever behind the hydraulic control lever that works it.appears to be in the lowered position now but might have a linkage problem.Have you hooked something heavy to the 3pt to see if it raises by itself then?That'd be my next test.
 
Looks to be Series I or II. Can't tell w/o knowing the serial number from just the pics you posted. It's also had front grill shroud/grill and fenders from a Series III or IV put on it and it has the wrong muffler on it. But on the hydraulics, the left underneath lever on the steering wheel is the hydraulics raise/lower. In the pictures it is in the hold position. Push the lever/down & forward and pull it down to about an 8 o'clock position from the 9 o'clock position it is in to lower it if you have not done that already. It will be much stiffer than moving it between hold & raise. The aftermarket 3 point may not be heavy enough to lower it by itself without and implement attached or someone standing on the lift arms. If this does not work, move the linkage and follow it to see that everything is connected to it. Also as suggested, the left topside lever is the traction booster and it needs to say in the down (9'oclock) position. Report back with more information once you try/confirm these. Mike
 
Will check it out after work, its the neighbors new tractor, he was just asking if I could help with it.

Told him I would see if I could get any pointers, thanks for the info.
 
And the belt drive power steering pump, and the long, sweeping air intake, as with a dry air cleaner. This one's really got me confused. Unless it was built out of pieces and parts?
 
Not really sure, he paid 500 for a non-runner that was supposedly running when the guy parked it....

Came with a handful of 3pt attachments, a handful of spare parts, and a loader...

He called me over because he couldn't get it to start, it would crank, and just backfire. Flipped the dist cap(180 out, assume the PO had put in new points and got it on backwards and couldn't get it to start, hence the cheap sale) and she fired right up, runs fairly smooth.

He called me again, said the 3pt went right on up, just wouldn't go down.

I let him know about pushing the lever forward and then down another inch or so, he said he would give it a shot this evening.

I missed him at the house after work, could have something to do with me spending an hour or so picking mushrooms in the woods after work... :) Priorities!!!
 
Where is the ser# located on an AC, I will try to get it tomorrow and maybe we can narrow down what year it is 'supposed' to be.
 
Lift arms went down just like they are supposed to, neither of us knew about having to tilt the handle and pull down that extra bit.

Serial # is D17 65023, does that tell us anything other than a rough idea of when it was made?
 

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