D-19 hydraulics problems

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   Hi y'all 
We recently acquired my great grandpa's D-19 through an auction and are planning on using it for moving round bales, blading the drive, and moving snow. It runs great but the hydraulics won't hold pressure so they go down with my weight, about 150lbs. I replaced the copper o ring and other o rings in the check valve under the controls it worked great and lifted our bale stabber. It held till I put it in reverse to back up to a bale then down it went. The original o rings didn't have any major damage to them so wondering if we have a bigger issue.
We have an AGCO dealer and a tractor junkyard not far from us where I can get parts if needed. I'm not familiar with hydraulics so any help is appreciated.
Thanks 
Braxlee

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braxband Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 30 Oct 2024 Location: 50219 Points: 2	Post Options Post Reply Quote braxband Report Post Thanks(0) Quote Reply Topic: D-19 hydraulics problems Posted: 30 Oct 2024 at 2:57pm
	Hi y'all We recently acquired my great grandpa's D-19 through an auction and are planning on using it for moving round bales, blading the drive, and moving snow. It runs great but the hydraulics won't hold pressure so they go down with my weight, about 150lbs. I replaced the copper o ring and other o rings in the check valve under the controls it worked great and lifted our bale stabber. It held till I put it in reverse to back up to a bale then down it went. The original o rings didn't have any major damage to them so wondering if we have a bigger issue. We have an AGCO dealer and a tractor junkyard not far from us where I can get parts if needed. I'm not familiar with hydraulics so any help is appreciated. Thanks Braxlee

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DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 20535	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 30 Oct 2024 at 6:18pm
	I'm no fan of D-19 hydraulic systems, but the problem is in that valve stack. Anything related to the porting and spool to the lift arms is suspect. If it's any consolation, D-19's are some what known for the lift arms settling with a load on them.