Dave M7040
Elite Member
- Joined
- Dec 10, 2012
- Messages
- 2,757
- Location
- Williamstown Ontario Canada
- Tractor
- Kubota M7040 Nuffield 465
Removing the closed circuit plug in the control valve is only half the job. Most controllers have at least two and some have several different plugs or sleeves that fit into the control valve. Which one you use depends on whether it is an open or closed hydraulic system and whether you want to run power through the Power Beyond port or not.
If you simply removed the closed circuit plug without replacing it with the correct type of circuit plug then all bets are off. Well, not all bets. I'll put my money with Dave who said "..... you CANNOT just cap off the PB circuit. You are dead heading the pump!"
What he is saying is that IF you have found a proper open circuit Power Beyond Enabling Plug (or sleeve) and put it into the control valve, - and each brand of valve uses their own different plug - then if you do that properly and also block off that PB line you are likely to be deadheading the pump. Deadheading should stall the engine. And if it is deadheaded and you rev it up and slip the clutch then something expensive and dangerous is likely to happen.
Be Careful,
rScotty
rscotty.
We are not in disagreement. In his first post he was complaining the tractor would immediately stall when the pto was engaged to drive a pump he had personally bought and connected to the hoe.
Since that post, he has been jumping around removing and reconnecting plugs, sleeves perhaps and then plugging what he believes is the pb circuit. Now he has mamaged to get open center flow unil he moves a control and then:
"The plugs have been removed to allow flow through and when tractor is running the backhoe flow is fine until you pull on the stick to move it and then it starts to bog down and eventually stall tractor but the flow is fine even after I capped the PB as long as you don't pull a lever."
In other words, this hoe, although a commercially manufactured product has, had its heart re engineered by someone without all the knowledge necessarily. Something is not core4ct in the valve!
To understand his system, he needs to provide more details on the forum, a web site to the company who made the hoe, and info on the valve.
He is lucky his pto does not have more power or the broken and destroyed parts would be happening
Dave M7040