Broken 3pt systems

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

   This year I have encountered a bunch of tractors with malfunctioning 3pt hydraulic 
systems. Won't go up, won't go down, or too slow in either direction, draft response wacky. This is all brands, A/C, JD, Ford, IH. I think the position/draft control valves get dirty, corroded and stick. To make it worse, those types of valves seem to always be 
custom. Not a generic industry type valve. So no parts, and not so much knowledge out there for repair.

Would changing the fluid every year stop future problems?

	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
BrianC Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 16 Jun 2011 Location: New York Points: 1619	Post Options Post Reply Quote BrianC Report Post Thanks(0) Quote Reply Topic: Broken 3pt systems Posted: 14 Dec 2016 at 2:49pm
	This year I have encountered a bunch of tractors with malfunctioning 3pt hydraulic systems. Won't go up, won't go down, or too slow in either direction, draft response wacky. This is all brands, A/C, JD, Ford, IH. I think the position/draft control valves get dirty, corroded and stick. To make it worse, those types of valves seem to always be custom. Not a generic industry type valve. So no parts, and not so much knowledge out there for repair. Would changing the fluid every year stop future problems?

Sponsored Links

jaybmiller Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Greensville,Ont Points: 24419	Post Options Post Reply Quote jaybmiller Report Post Thanks(0) Quote Reply Posted: 14 Dec 2016 at 3:06pm
	It should.. I've been thinking I should recycle my fluids through a filter just to get some of the 'sludge' out. I know if I just let it sit in a 5 gallon pail for a few days there's a layer of very fine 'particulates' on the bottom of the pail, and cleanliness is what hydraulics NEEDS. Jay
	3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water

BrianC Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 16 Jun 2011 Location: New York Points: 1619	Post Options Post Reply Quote BrianC Report Post Thanks(0) Quote Reply Posted: 14 Dec 2016 at 8:05pm
	Hydraulics are good for like a loader or remote cylinder. The simple spool valve. But for servo control type stuff, I don't know. In my time operating large machine tools I have had two electro-hydraulic servo valves stick and result in machine runaway. One "attacked" me. The machine was about 13 years old. So one of the tractors I saw this summer was a 160 (like mine), the 3pt arms were missing, I ask why. They said the 3pt system didn't work, so they removed them. They just use the drawbar now. Another was a JD 830 (the little 3cyl one),relegated to pulling the wagon.