Kubota L4400 Bent Front End Loader Dump Cylinder UHOH

[dex3361]

Went to my buddy's house and he has a L$$)) with the same FEL and I took some pics of his to compare the dump angle and the rollback angle of the two. What doe the experts of TB think? Mine are the one listed as Randall. It appears that something is not right. I suspect that the SSQA is mislabeled or something. I am still waiting to hear back from the Kubota Rep.

 

[LD1]

I dont see any labeling to tell which is which, But I'd assume that yours is the 2nd and 3rd pics and your buddys is the 1st and 4th???

If so, something is definatally not right with yours? I am not sure we covered this (an I am too lazy to go back and look:laughing but...

how old is your machine?
Warrenty????
Did the dealer install the SS QA????

And in the last pic of your buddys being all the way dumped, it doesnt even look right. Is it ALL the way dumped??? Because I feel it should be hitting the mechanical stop, but instead, it looks like the cylinder is maxing out well before that, even though it isnt touching the arm:confused2: If that is the case, he could wind up in the same boat as you, but instead of a bent rod, he could tear the front right off the cylinder by over-extending it if he isnt carefull. It should definatally be hitting that mechanical stop. And it appears that the SS QA moves everything more forward.

Also, have you taken any detailed measurments of pin spacing and distances to see if yours may be different than his??

Either way, IMO, they BOTH need addressing.

 

[dex3361]

I dont see any labeling to tell which is which, But I'd assume that yours is the 2nd and 3rd pics and your buddys is the 1st and 4th???

If so, something is definatally not right with yours? I am not sure we covered this (an I am too lazy to go back and look:laughing but...

how old is your machine?
Warrenty????
Did the dealer install the SS QA????

And in the last pic of your buddys being all the way dumped, it doesnt even look right. Is it ALL the way dumped??? Because I feel it should be hitting the mechanical stop, but instead, it looks like the cylinder is maxing out well before that, even though it isnt touching the arm:confused2: If that is the case, he could wind up in the same boat as you, but instead of a bent rod, he could tear the front right off the cylinder by over-extending it if he isnt carefull. It should definatally be hitting that mechanical stop. And it appears that the SS QA moves everything more forward.

Also, have you taken any detailed measurments of pin spacing and distances to see if yours may be different than his??

Either way, IMO, they BOTH need addressing.

The mechanical stop you are looking at is for the pin on bucket you cant see the stop but they are both at the stop limit on the dump and rollback. Mine are the first and third pics both on the left. mine will not roll back all the way the cylinder bottoms out on the rollback and hits the boom on the dump.

 

[LD1]

The mechanical stop you are looking at is for the pin on bucket you cant see the stop but they are both at the stop limit on the dump and rollback. Mine are the first and third pics both on the left. mine will not roll back all the way the cylinder bottoms out on the rollback and hits the boom on the dump.

A long as they bot have a stop limit.

But I still think there is something wrong with his. The cylinder shouldnt be touch like that when retracted. And yours shouldnt be touching when dumped.:confused2: I would take some very detailed measurments of both to see if there are any tiny differences.

 

[dcyrilc]

Well I spent some time looking closely at the cylinders and the movement and such. I found a different issue that may very well be instrumental to the cylinder failure. The rod of the cylinders hit the bottom most part of the boom in full dump mode. It appears that the SS Quick Detach has the movement stop made onto it. The cylinder rod hits the boom before it hits the limit stops. Here are a few pics of what I am talking about. I also have a call in to the Kubota dealer to get his opinion and see if this is supposed to be. It doesn't look right to me. I checked everything and nothing is bent and all pins are tight. If you look closely you can see where the rod has been hitting the boom. All thoughts and comments appreciated.

I found the other thread with the rod touching the loader arm.. I think that part starts around post # 12.

http://www.tractorbynet.com/forums/hydraulics/202945-dented-cylinder-2.html

Sean

3rrl did a very good thread on rebuilding the stops on the Jinma because of this very reason. Let me see if I can find his thread.

Here it is. Take some time while you're waiting to hear from the dealer and enjoy some great reading!
http://www.tractorbynet.com/forums/chinese-tractors/124396-add-more-bucket-curl-jinma.html

 

[Chilly807]

I checked the rod to loader arm clearance on my L3400 earlier in the week, it definitely has clearance. Not a lot, I'd say it's between your buddy's and yours. I'll take some pics the next time I have the tractor running.

Sean

 

[General Lee]

Dex -

I snapped a couple pics of the loader on my L4400 so you have another one to compare to. Theres not alot of room between the cylinder and loader but more than you have. Mine seems comparable to your buddy's. One pic fully curled, one fully dumped:

 

[dex3361]

I checked the rod to loader arm clearance on my L3400 earlier in the week, it definitely has clearance. Not a lot, I'd say it's between your buddy's and yours. I'll take some pics the next time I have the tractor running.

Sean

Sean I appreciate the input and the pictures will help in what it is supposed to look like.

 

[dex3361]

Dex -

I snapped a couple pics of the loader on my L4400 so you have another one to compare to. Theres not alot of room between the cylinder and loader but more than you have. Mine seems comparable to your buddy's. One pic fully curled, one fully dumped:

Thanks for the pictures and that is what mine is supposed to look like. Your rollback angle is what mine is but the dump function is correct on yours and mine goes a little further which is a little to much. Guys this helps a lot.

 

[J_J]

Just add some more material to the mechanical stops.

 

[Chilly807]

There's definitely something different about yours, Dex.

I think it may be that the pivot and cylinder pins are closer together than they should be.

I noticed that the end of the cylinder almost binds with it fully curled, as well as the rod touching fully dumped. Lee's has separation at both extremes.

It may not be the right quick attach plate for your loader, although the width would have to be right.

Sean

 

[dex3361]

Just add some more material to the mechanical stops.

You are correct JJ I tried it with 1/8" thick washer in as a shim and if I repair it that is what I will do.

There's definitely something different about yours, Dex.

I think it may be that the pivot and cylinder pins are closer together than they should be.

I noticed that the end of the cylinder almost binds with it fully curled, as well as the rod touching fully dumped. Lee's has separation at both extremes.

It may not be the right quick attach plate for your loader, although the width would have to be right.

Sean

I thought the quick attach plate may have been for a different loader but that is still up in the air.

Thanks for all of the input. The different opinions help with the decisions. I hope Kubota steps up here and helps out with the cost.

 

[dex3361]

I think an update is in order. I talked with Gary at Barlow tractor about the issue and he talked with the Kubota Rep. It seems that the SSQA that is on my tractor was an add on and the SSQA on my buddy's tractor was installed from the factory. So they are a bit different. That said I have been working with Gary(Barlows parts guy) and the Kubota Rep to see if Kubota will replace the cylinder. I agreed to install shims. I have not heard back from the Kubota Rep but Gary sent me a new cylinder. I installed the shims and the new cylinder and I am back in business. Please excuse the tractor cleanliness as I am in the middle of of a clean up job when this all took place. I have confidence that Kubota will step up and do their part in this issue. Gary has been great to work with and I still believe that Barlow tractor is a great dealer. Thanks for all the advice and input guys. There is no better place to get good tractor advice than the crown on TBN.

 

[slowzuki]

If no one has mentioned already, its common to toss the cylinder into a press and straighten the shaft as a cheapy repair.

 

[dex3361]

If no one has mentioned already, its common to toss the cylinder into a press and straighten the shaft as a cheapy repair.

I looked at that but my gland was broke and the cylinder was egg shaped at the threaded end. Thanks for the suggestion though.

 

[Chilly807]

I recently straightened a bent cylinder rod (not from the tractor) and it turned out OK, but it wasn't nearly as bad as Dex's and the gland was in good shape.

Glad you got it fixed up, I've been dealing with a warranty issue lately myself, and Kubota in general and my dealer in particular have been very good to deal with.

Sean

 

[CptTrog]

If you can find two aftermarket cylinders that work for you, I'd suggest putting the remaining good cylinder on E-bay and selling it to pay for the replacements.
-snip-
Sean

Replace both to keep stresses equal on FEL and hydraulic system. Keep the remaining good cylinder as a TEMPORARY backup for future events, which WILL happen. You'll need that spare for very light work(only) until your future replacements arrive.

 

[arrow]

Replace both to keep stresses equal on FEL and hydraulic system. Keep the remaining good cylinder as a TEMPORARY backup for future events, which WILL happen. You'll need that spare for very light work(only) until your future replacements arrive.

I think after a couple of years he's figured it out.

 

[dex3361]

Has it been that long? Sorry for not coming back with the resolution. Barlow Tracor and Kubota took care of the issue by sending me another cylinder with the agreement that I would add shims to prevent the cylinder from hitting. This was resolved well over 2 years ago without any further issues. Sorry for the long delay on the feed back.