8030 low hydraulic flow

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   I bought a stack mover that the bed chains are driven hydraulic. Hooked it up to my 8030 and the chains ran super slow. Had local mechanic flow test my remotes and it's only doing 3 gpm at any pressure up to 2600 psi. I put a 3000 psi gauge on at the pto valve tee, and I am getting idle circuit pressure of 410 psi, if I activate a remote that has nothing connected the idle circuit pressure jumps to 2600. Talked to local dealership service manager and he suggested looping each box to make it flow without restriction, and toggle the remotes to try and unstick the valve that runs the swash plate. After doing so local mechanic put flow meter back on and when I opened a valve it maxed his meter out at 20 gpm, the instant he started to restrict the flow to test pressure it went back to 3 gpm. We tried all previous things and can not get more than 3 gpm at any box now. What's wrong with this thing?

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Josh(NE) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Nebraska Points: 514	Post Options Post Reply Quote Josh(NE) Report Post Thanks(0) Quote Reply Topic: 8030 low hydraulic flow Posted: 7 hours 47 minutes ago at 5:51pm
	I bought a stack mover that the bed chains are driven hydraulic. Hooked it up to my 8030 and the chains ran super slow. Had local mechanic flow test my remotes and it's only doing 3 gpm at any pressure up to 2600 psi. I put a 3000 psi gauge on at the pto valve tee, and I am getting idle circuit pressure of 410 psi, if I activate a remote that has nothing connected the idle circuit pressure jumps to 2600. Talked to local dealership service manager and he suggested looping each box to make it flow without restriction, and toggle the remotes to try and unstick the valve that runs the swash plate. After doing so local mechanic put flow meter back on and when I opened a valve it maxed his meter out at 20 gpm, the instant he started to restrict the flow to test pressure it went back to 3 gpm. We tried all previous things and can not get more than 3 gpm at any box now. What's wrong with this thing?
	Allis Express '65 190XT, 37 B, '72 170, '83 8030, and the IH 560 was a mistake

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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: 21992	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 7 hours 8 minutes ago at 6:30pm
	It sounds like a piston pump issue. I'm thinking the rotating barrel must be lifting off the end housing when enough pressure is made. When I was younger I'd have a pump like that off the tractor and scattered on the bench in no more than one hours time. That's what I'd be doing if it was mine. Once the pump is removed, but NOT disassembled, see how difficult it is to turn the shaft. It should turn hard enough to require a pair of pliers to rotate it. If it turns easy, it's what I suspect. Something wrong with the coil spring pressure system or a badly worn barrel and end plate. Edited by DrAllis - 7 hours 4 minutes ago at 6:34pm

8070nc Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 21 Mar 2019 Location: North Carolina Points: 630	Post Options Post Reply Quote 8070nc Report Post Thanks(0) Quote Reply Posted: 6 hours 13 minutes ago at 7:25pm
	Flow control could be turned down
	1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21992	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 4 hours 26 minutes ago at 9:12pm
	Well, I would hope the flow controls for each valve were tried. Both of them would have to be on the slowest setting, not one. And how could the flow go from 2 to 20 GPM ??

Josh(NE) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Nebraska Points: 514	Post Options Post Reply Quote Josh(NE) Report Post Thanks(0) Quote Reply Posted: 3 hours 11 minutes ago at 10:27pm
	Flow controls have been tried in various positions Currently, they are pointing to the left as viewed from under the seat. If turned straight up, or to the right flow also does decrease.
	Allis Express '65 190XT, 37 B, '72 170, '83 8030, and the IH 560 was a mistake

Josh(NE) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Nebraska Points: 514	Post Options Post Reply Quote Josh(NE) Report Post Thanks(0) Quote Reply Posted: 3 hours 9 minutes ago at 10:29pm
	Any chance the issue is caused by the priority valve?
	Allis Express '65 190XT, 37 B, '72 170, '83 8030, and the IH 560 was a mistake

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21992	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 2 hours 33 minutes ago at 11:05pm
	I've thought about that, but have never had a 7000 or 8000 tractor ever bother in that particular area. If it's easy to remove on the valve (without removing the valve stack) I probably would, to verify no sticking spool or a broken spring. If I was standing next to the tractor while running I might hear something that would point me to the pump that you can't hear. I had a 7060 some 40 years ago that did a similar thing and the pump lost its squeeze on the rotating group. When or how many hours ago did the remotes actually work correctly ?? You haven't changed the belly filters just recently ?? and are they AGCO filters ? (they need to be) and if the right hand filter is installed backwards, the piston pump will do really weird things. I had one customer do that one time and only one time have I seen that.