RX7320 FEL Curl Cylinders - L&R different movement rate

[Newfiestang50]

Folks, I have a new RX7320 with FEL. Only 15 hrs on the tractor and just removed the front bucket for the first time to install my pallet forks and having an issue where the skidsteer attachment plates are not positioned the same on each side during curl travel. In other words the left plate is slightly out of sync with the right plate. What i am noticing is that when functioning the curl motion the left curl cylinder always seems to start moving before right, thus the two skidsteer mounting plates are at different positions throughout the stroke. If i let them go full cycle until they reach the stops the left will stop first and the right will then follow. They will then line up but never when in partial stroke. This is making it very difficult to mount up to different attachments.

Anyone got a suggestion as to the cause. I know i have warranty but the dealer is 2 hrs away. Rather fix myself if something simple. Im thinking this could be a restriction in the right side hydraulic line impeding flow....could this be the cause? Looked all over the FEL for signs of stress or some damage but cant see anything.

Any help appreciated. PFA

 

[repete]

Are you speaking of when the two cylinders have no load or mechanism to tie them together?

 

[ptsg]

There should be a crossmember tied both left and right plates together to avoid that. If the plates move independently of each other, the crossmember maybe broken. Take a closer look and make sure it's not broken.

Also, it's not uncommon for the crossmember to twist if one side pops out of the attachment.

 

[etpm]

One of my son's friends had a similar problem with a small used dozer he bought. A right side cylinder was always lagging behind the left side cylinder. They brought it to me because I know a little about this stuff. After all the obvious stuff was ruled out I had my son swap the hoses to the cylinders. The problem swapped too. The problem, which was as I suspected, because of some new hoses. One hose fitting had been over crimped which restricted the flow through that hose. This caused the lagging cylinder. It would always catch up after the other cylinder had stopped moving so I suspected some sort of hydraulic impediment instead of a mechanical problem. Anyway, I hope this helps.
Eric

 

[Newfiestang50]

Are you speaking of when the two cylinders have no load or mechanism to tie them together?

There is a round tube that connects both together, its not broke but it does come under some strain when one plate starts moving before the other.

 

[Newfiestang50]

There should be a crossmember tied both left and right plates together to avoid that. If the plates move independently of each other, the crossmember maybe broken. Take a closer look and make sure it's not broken.

Also, it's not uncommon for the crossmember to twist if one side pops out of the attachment.

There is a round tube that connects both together, its not broke but it does come under some strain when one plate starts moving before the other.

 

[Newfiestang50]

One of my son's friends had a similar problem with a small used dozer he bought. A right side cylinder was always lagging behind the left side cylinder. They brought it to me because I know a little about this stuff. After all the obvious stuff was ruled out I had my son swap the hoses to the cylinders. The problem swapped too. The problem, which was as I suspected, because of some new hoses. One hose fitting had been over crimped which restricted the flow through that hose. This caused the lagging cylinder. It would always catch up after the other cylinder had stopped moving so I suspected some sort of hydraulic impediment instead of a mechanical problem. Anyway, I hope this helps.
Eric

This sounds like it could be my issue, ill do plan on inspecting hoses and connections.
thanks

 

[npalen]

Have you tried feathering the valve to let the cylinders move slowly? This might indicate a restriction in one of the hoses if the slow flow allows the cylinders to stay in sync.

 

[ruffdog]

I wonder if the pivot pin on one side is tight?

 

[Newfiestang50]

Have you tried feathering the valve to let the cylinders move slowly? This might indicate a restriction in one of the hoses if the slow flow allows the cylinders to stay in sync.

Havent tried that but i will. Thanks

 

[Newfiestang50]

I wonder if the pivot pin on one side is tight?

Not sure yet but all pins look well greased. There is no squeak or anything so im guessing the pins are ok. Thanks

 

[LD1]

It's impossible to have two cylinders, with their various linkages and pins and pivots have the exact same resistance.

That's what the torque tube is for, to tie both sides together so they stay in time.

If you have something hanging up enough on one side that you can visually see the torque tube under stress you have an issue. You have to find out what is binding causing one side to lag.

You can try unpinning the cylinders from the SSQA plate and see if the plate moves freely as well as the 4-bar links. You can try swapping hoses and see if the lagging cylinder follows the hoses.

But the torque tube "should" be stout enough to keep things lined up and overcome a little resistance if one side is a little tighter than the other

 

[ruffdog]

If you have something hanging up enough on one side that you can visually see the torque tube under stress you have an issue. You have to find out what is binding causing one side to lag.

You can try unpinning the cylinders from the SSQA plate and see if the plate moves freely as well as the 4-bar links. You can try swapping hoses and see if the lagging cylinder follows the hoses.

That's what I would do. Pull the cylinder pins and see how it moves. If it moves easily, then you know you have a hydraulic restriction.

 

[Billrog]

Sounds like 1 side is getting air in it and once you push it out they synchronize again. I repaired a slide on a friends motor home once where this was the case , had to replace the lagging cylinder which showed no signs of leaking .