Did you cycle it several times to get the air worked out?

 

Yes I been running for a while today I forgot to mention after I rebuilt the loader cylinders I drained the hydraulic fluid and changed the filter before starting it so I didn’t get any old fluid in the cylinders.

 

I put a gauge on it too and I’m getting like 2400 psi’s so I’m pretty sure pressure it good. I did notice when I would dump the bucket it was more floppy when swinging Down to dump after rebuilding that seems smoother now but when I’m dumping it has about a 3 second delay to hit the prv but in other directions it hits the prv quicker. Not sure if that means anything I read some people out a reducing orifice washer on the return like whem dumping the bucket swings down faster then the pump can supply fluid to the cylinder and causes a vacuum leak somehow ?? Idk 🤷‍♂️ I made a video but can’t figure out how to post it here??

 

GTT doesn't support video hosting.
If you have an external service like youtube, you can post a link to share in the discussion.

 

GTT doesn't support video hosting.
If you have an external service like youtube, you can post a link to share in the discussion.

I posted link to video

 

Unplug your couplers and make sure they a sealing good then cycle. Sounds like flow problem or still have some air

 

Ok so unplug the loader cycle the loader valve make sure there not leaking then reconnect the hoses and try it ?

 

Ok so unplug the loader cycle the loader valve make sure there not leaking then reconnect the hoses and try it ?

 

Are you familiar with the 'regen' function of the loader valve?

What is "Regen" or the...

What is "Regen" or the "Regenerative" function of a FEL Valve? Read it here ;) Regen is a "feature" of most modern FEL (Front End Loader) valves, it's on the Dump (joystick far right) circuit, and is also referred to as "Fast Dump". The reason it is nice to have is that without it, the weight...

www.greentractortalk.com

 

Ok I will read that thanks!!

 

I don't think the loader has enough travel to lift the wheels with the bucket curled back. Is this something your loader would do before you built the cylinders?

 

If I go to full curl then 45 degrees angled down then push down with the loader the bucket just curls up and won’t lift the wheels off the ground but if I go to full dump then angle it at 45 degrees downward and push down with the loader it will lift the wheels off the ground easily.

 

I am going to post a video to you tube and put the link here.

 

Ok guys this will explain it easier for what’s happening maybe it’s a regen thing that I’m not used to I don’t know.

 

It looks like you're using the regen feature of the dump cylinder to put the bucket into position when it fails to lift the tractor up based on bucket speed and joystick position. If you slowly use the dump cylinder (without going all the way to the left), does it still curl the bucket when you try to lift it up?

 

I think I tried to dump it slowly and then try to lift the wheels off the ground I think it did the same thing but I will check it tomorrow morning and post what happens.

 

Correct. And note I added a warning about not working on pressurized hydraulics. You rebuilt the cylinders so you probably have basic hydraulic knowledge, I just want to be sure you understand that pressurized fluid can get under your skin and cause nasty infections.

 

Thanks I appreciate the warnings I’ve been a mechanic for 30 years and work on hydraulics daily so I know what your saying I hope to never have that happen to me I’ve seen some pics online and it’s bad.

 

Can you guys spot the mistake in the factory John Deere compact 4010 operators manual ? Not sure how silver became red ? But regardless looking at the photo I think this has a regen dump operation even though the manual doesn’t mention it at all. It shows the bucket dumping not sure if that’s just to show the dump position or if it has two positions like some have mentioned on here.

 

I can assure you that there IS a region position, you just won't really feel it like you do the float on the DOWN side of the valve.

I owned a 4110 for 12 years, the 4100 is virtually the same machine.

There is a mechanical lockout on the linkage, I can just you some pics later of it.

 

I am going to try an isolate the issue between the tractor and loader even if it has a regen it shouldn’t be spongy after a full curl and then go and try to lift the wheels off the ground from what I read on how the regen works it supplies equal pressure to each side of the cylinders but the weight in the bucket pulls it down but by supplying pressure on the dump and curl sides it stops any cavitation from happening but I’m still trying to figure this out so I’m not a 100% sure if you can post pics of the regen lockout that would great thanks

 

My 4310 has this and also gets the floppy bucket but my lockout lever won't move from the top position.

I think this is the regen lock out Ken is referring to.

 

I do have the L shaped bracket I will flip it tomorrow and see what happens but I feel it won’t fix my problem because either way the bracket shouldn’t cause my issue.

 

So today I ran the tractor a little bit and this is what I found it I curl even a few inches then push down to lift wheels it collapses if I dump a few inches then push down it lifts the wheels off the ground every time no problem I called the dealer and they said check fluid level because I told him the level was in the middle of the low and full mark so I’m going to mess with it tomorrow a little more.

 

Did you flip the bracket?

 

No I didn’t do it because ended up doing the oil air and fuel filter I didn’t think it would help but I will give it a shot at this point.

 

So from what I’ve been reading I have the same symptoms as Floppy Bucket Syndrome so has anyone found a cure for this problem I read some people have put a reducing orifice washer or adjustable flow valve on the rod side fitting of the cylinder so it slows the flow when dumping the bucket and reduces the chance of creating a vacuum and sucking air into the base side of the cylinder???

 

For reference sake I just tested the 420 loader on my 4310 and could not duplicate the situation you are experiencing. Mine will lift the tractor no matter which direction I curl it from. I have generic 2x18 Magister cylinders installed for lift and curl.

I have on occasion experienced the floppy bucket and when I do I cycle the bucket all the way through it's motion a couple of times and that seems to make it stop. Sometimes if it goes limp while I am attempting to back drag I will just push the lever to the right a little and force it back down.

It's a mystery why mine goes limp sometimes and other times not. My tractor has the regen lockout lever I posted a picture of but it is frozen and won't move out of position C.

 

Yeah I ran mine today again and it only gets floppy where it collapses trying to lift the wheels off the ground if I roll the bucket to the curl position for a few inches or more but if I go to dump for decent amount of travel then come back to like 45 degrees it stiffens up and lifts the wheels off the ground every time. I read either a small orifice washer or adjustable flow valve on the rod side will help with it and I read about the pump not having enough flow when dumping but for the amount of money to replace the pump I can live with it