What causes this?

[handirifle]

On several pieces of equipment, I own or have rented, or borrowed, I see it on every one, when using the FEL the bucket will go so far, then you need to sort of "cycle" the control to keep it going.

In other words, the bucket will drop, say 70% of the way, then you need to return the control to neutral, rev, and do it again tl get the rest of the travel. What causes this? Is it wear, or normal for some reason I cannot figure?

 

[beenthere]

Are you familiar with the dump feature that causes this?
Do a search on regenerative circuit, I believe, to get an explanation.

It is a feature to get a faster dump when the bucket has a load. For some, takes some getting used to, but is a benefit.
For example
http://www.tractorbynet.com/forums/hydraulics/169883-can-someone-explain-regen-etc.html

 

[SPYDERLK]

Iv never seen anything like that, neither in regen or regular mode. Perhaps I misinterpret the description.
larry

 

[handirifle]

WOW! Beenthere
Went there. Read the thread. Boy this passes over my head pretty quick. I got a general idea on what they're talking about, that does help.

My main concern was something was wrong woth them, but I see what they are doing.

Thanks

 

[dcyrilc]

On several pieces of equipment, I own or have rented, or borrowed, I see it on every one, when using the FEL the bucket will go so far, then you need to sort of "cycle" the control to keep it going.

In other words, the bucket will drop, say 70% of the way, then you need to return the control to neutral, rev, and do it again tl get the rest of the travel. What causes this? Is it wear, or normal for some reason I cannot figure?

Mine does the same thing, but will actually begin curling if you don't rev up the RPMs. In my case, I associate it with an old tired machine with highly worn valves.

 

[handirifle]

Mine does the same thing, but will actually begin curling if you don't rev up the RPMs. In my case, I associate it with an old tired machine with highly worn valves.

That's what I wondered, but given what they say and that every machine I've used has done it, I'm hoping it's be design.

 

[dcyrilc]

That's what I wondered, but given what they say and that every machine I've used has done it, I'm hoping it's be design.

I've used construction equipment for years (backhoes and loaders). They don't do it. I'm assuming wear, but time will tell after I rebuild or replace my valves this winter.

It's frustrating to have the lever at full dump and have the bucket curling.

 

[sweettractors]

I've used construction equipment for years (backhoes and loaders). They don't do it. I'm assuming wear, but time will tell after I rebuild or replace my valves this winter.

It's frustrating to have the lever at full dump and have the bucket curling.

I have never came up on this situation either, I would think wear in cylinders, pump, valve, etc. Ken Sweet

 

[J_J]

Maybe the lever for that valve is not coming back all the way to neutral. Could be weak spring. Leaking spool in that valve could cause that.

 

[MD3]

Are you talking about the bucket tilt cylinders? If so after the load is dumped it will take a moment for the hydraulics to catch up to the cylinders.