Loader refurbishing worse than when I starte

[woolyAcres]

I had a chance to work on this a bit tonight. I went ahead and connected this new loader valve into the rear 3PT hydro system. This is how it was plumbed originally. The only changes now are the new hoses and loader valve. I need to raise the pressure relief valve back up to 2000psi. I had turned it way down to avoid any damage/problems while I was working with that front pump. All the functions seem to work, though it's very slow. I need to get it outside (tomorrow) where I can raise the boom all the way up and get the air out of it. When I had it dismantled I blew air through all the hard lines and the cylinders drained all over the floor so I'm sure there's still a bit of air in there.

Once I get the tractor all put back together (hood on, battery strapped down, etc) I can get it out of the garage. Maybe then I'll have some time to look at the pump I removed; however I think I'm going to try to live with what I've got for a while. If/when I return to this I'll probably be looking for a new front mounted pump where I know the requirements for it- make, model, volume, pressure, required fluid, etc. I didn't realize how important that would be.

Thanks to everyone for the input, encouragement, and education. Even if this didn't turn out the way I'd hoped, I have certainly learned a lot about my tractor and hydraulics in general.

 

[TomSeller]

Good to hear. It sounds like the pump was too big for the valve as a first reaction. Keep us posted. good luck!

 

[ch1ch2]

That would just mean it would curl when it should boom and boom when it should curl. As long as the 1s are together and the 2s are together the pressures should be okay.

You would be correct in an older valve system but with the newer regen systems your are not correct. That is a reason they give so much problems when connecting them if not done properly.
In the older double acting non-regen, fluid went to one side of the cylinder to push the piston or to the other side to push the piston the other way. The opposite side fluid was returned to the tank. Regen does not return all the fluid to the tank but redirects some of the fluid to the second set of cylinders in order to speed them up or make them move faster. As I understand it was designed to make it easier to dump a load from the bucket.

 

[TomSeller]

You would be correct in an older valve system but with the newer regen systems your are not correct. That is a reason they give so much problems when connecting them if not done properly.
In the older double acting non-regen, fluid went to one side of the cylinder to push the piston or to the other side to push the piston the other way. The opposite side fluid was returned to the tank. Regen does not return all the fluid to the tank but redirects some of the fluid to the second set of cylinders in order to speed them up or make them move faster. As I understand it was designed to make it easier to dump a load from the bucket.

Someone correct me if I am wrong but on the mechanical spool used in this thread 1s and piped to the same cylinder set and 2s are piped to the same set. So regen and float would just happen on opposite boom vs curl. On solenoid type systems, yes the piping can get messy.

 

[woolyAcres]

Someone correct me if I am wrong but on the mechanical spool used in this thread 1s and piped to the same cylinder set and 2s are piped to the same set. So regen and float would just happen on opposite boom vs curl. On solenoid type systems, yes the piping can get messy.

The schematics in that document don't mean anything to me. I don't know how to read them. However, as mentioned, I moved the supply back over to the original 3PT diverter block but never changed anything about the working ports. The loader functions just as in the diagram below. I can't honestly say regen does anything noticeable, but float is certainly there. There's no strange behavior and, after working it a few times things aren't too bad. However, I don't really see two functions happening at the same time. For instance, curl and lift. It's more like one then the other. I assume that's because there isn't sufficient flow. So maybe things still aren't plumbed correctly, but I'm not sure what more I expect it to do.

 

[oldnslo]

In order to both lift and dump you must feather the controls otherwise the oil will take the path of least resistance. Region is for fast dump. It deirects all of the oil from the rod end of the cylinders back into the cap end along with the pump flow. This function requires you to push the lever hard enough to get past the detent stop to get into the regen. Mode you should see a significant speed change on the cylinders.

 

[LD1]

The detent on the lv22 is hardly noticable. At least on ours.

May or may not notice it dump faster. If gravity is taking over, non-regen may dump just as fast.

But you will notice after it is dumped, when rolling back, if gravity is indeed takingnover and you are sucking in air, there will be a delay and/or floppy bucket. That delay and floppy bucket won't be there with regen

 

[woolyAcres]

The detent on the lv22 is hardly noticable. At least on ours.

May or may not notice it dump faster. If gravity is taking over, non-regen may dump just as fast.

But you will notice after it is dumped, when rolling back, if gravity is indeed takingnover and you are sucking in air, there will be a delay and/or floppy bucket. That delay and floppy bucket won't be there with regen

I can feel the detent on the float. And in fact it will stay in float without me holding the lever there. Handy for pushing snow today. I can feel a slight 'bump' when going to regen but the joystick won't stay there and I'm not sure it should. I'll pay closer attention to the regen tomorrow. On my father's NHTC45 the regen is noticeable. When dropping a round bale into a feeder, using regen, I can dump the spear faster than the bale slides off. Mine certainly isn't that fast. I'll have to pay attention to the floppy bucket indicating air being sucked into the system. Because I returned to using the tractor's reservoir, I can no longer see what's coming back into the tank (bubbles, foam, etc). But the floppy bucket should be pretty noticeable.

Thanks.

 

[LD1]

No it shouldn't stay in regen.

And far right, past the little bump is the regen. First position is normal dump

 

[woolyAcres]

No it shouldn't stay in regen.

And far right, past the little bump is the regen. First position is normal dump

Used the machine yesterday and it's working fine. Cycle times aren't seller, but it seems, after working it a little bit, they've gotten better. Acceptable even. The joystick control is a big improvement over the old 2-lever style. and the positioning is better/more comfortable. I think I need to re-check the pressure. I don't want it to be too high. I did lower it when having trouble and then increased it again when I went back to the original pump. However, the fittings on the pressure gauge mounting snot I made were leaking so I removed it. I'm afraid it's above 2500psi which I don't really want. I'll get the replacement fittings and reconnect it so I can re-adjust down to 2000psi. This isn't a big tractor and it's the only one I've got so I don't want to break anything.

Regen is working. There's a noticeable increase in dump speed when going into regen. I think this pretty much wraps up this thread. If I ever come back to the front pump, I'll start a new thread on that. But I'm satisfied with what I've got and it will keep me busy for a while. Thanks to everyone for their input.