8030 low hydraulic flow

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   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?

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Josh(NE) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Nebraska Points: 512	Post Options Post Reply Quote Josh(NE) Report Post Thanks(0) Quote Reply Topic: 8030 low hydraulic flow Posted: 2 hours 54 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

Sponsored Links

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21990	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 2 hours 15 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 - 2 hours 11 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: 1 hour 20 minutes ago at 7:25pm
	Flow control could be turned down
	1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor