Case 4210 XL cabin 3 point hitch

[Rataj Boris]

Hello everyone.

Case IH 4210 with XL cabin, new to me.

I'm having a problem with 3 point hitch arms under load, they will only go up about half when I attach something on them, free they will go up all the way.
When something is attached and I put lift lever all the way up and move draft control lever they will sometimes move up and go back down to the same about half position.
I just bought this tractor because I need something with cabin. Haven't done anything to it except change engine oil and filter. The pump doesn't seem to whine, hydraulic oil level is just above max.
Everything else hydraulic seems to be working, steering and brakes work very good, 4x4 and diff lock engage no problem, the 2 pairs of hydraulics work, tested on forklift attachment.
I have just bought service manual, read the hydraulics part, but this problem isn't explained, or maybe I'm not looking for right thing?
If any of you have an advice or solution, or if you can point me in the direction I need to start exploring on this problem I would be very grateful.

Thank you, Boris

 

[RjCorazza]

The only thing that comes to mind is the possibility that the pto shaft is too long and binding. Do the implements that won't lift have pto shafts? A binding pto shaft can do significant damage to the tractor.
If these are pto driven implements, try lifting them without the pto shaft connected.

 

[Rataj Boris]

No, pto was not connected. Just 3 points. It seems like arms have power and lift to that about halfway position, above that, they are very weak.
I have tried bale forks, which lift fine. Mulcher and mower it cant life beyond that point. Arms will jerk if I move draft lever, but not lift.

 

[RjCorazza]

I suspect draft control is already on your mind. I have no experience with draft control, but have read about draft control adjustment problems.
Hopefully someone with a similar machine, or knowledge of draft control will provide some assistance.

 

[Rataj Boris]

It is, but with attachment on and putting pressure up and down on it, as much we could with my friend, it seems like draft is doing adjustments.
If I would go tearing into valves, when I know into which and where, are there any o-ring kits available? In europe. My google researching lead me to 900, 200 and 100 series SAE boss o-ring sizes for the hydraulics on this tractor. I've found 900 series kit, but not other 2. I can order them separately, but don't want to. Seems like its gonna get expensive real fast.