553 Loader Question

[Rmd8136]

I have a 5065e, MFWD with 553 loader, global carrier and HD bucket. The loader works fine in every way. I noticed when I remove bucket and just have carrier installed the right side (from seat position) top hydraulic cylinder (curl and dump function) will easily move side to side between the steel plates. The movement is the block of steel on the carrier end, not the top end . The other side is tight and won't move. There is a large pin with grease fitting which goes thru the block of steel on the end if the hydraulic cylinder. When the bucket is reinstalled and there is weight on the cylinder, the right side won't move laterally. I am thinking that the pressure in the left cylinder must be slightly higher , even when unloaded, so there is a force in the pin/block interface, thereby making it not freely move laterally. I only noticed this with bucket off or when bucket is lowered resting on ground. The loader works fine. The space between the vertical steel sides thru which the pin passes is about 3/4 inch wider than the steel block on the end of the top cylinder. It has room for lateral play. It's just that the left side will never freely move laterally. Anyone ever noticed this? It is a pressure explanation where one side is slightly higher pressure?

 

[Tx Jim]

There should be no pressure differentiation between the 2 bucket cylinders as the pressure should equalize.

 

[Rmd8136]

Looking at hose routing and valves, that's what I was thinking too. What would explain what I am seeing? Everything works fine. I even greased the side with no play. Grease went thru fitting and came out between pin and block. It almost makes me think the upper and lower pins are not parallel. But the tight side will move laterally, easily on the top end (away from carrier) and the other side does not. Could it just be dimensional tolerances where one of the pins is just a tighter fit in the block on cylinder end? The tractor is new and covered by warranty I just don't have an easy way of getting to dealer. I figured I would wait until I get about 100 hours on it before I pay for them to come pick it up. I discussed with service Mgr. His thought was some residual pressure in that tight side.

 

[J_J]

Which ever cyl with the least resistance will move first.

You may also jave mechanical resistance.

 

[adirondackmtnman]

Could be the timing rod between the two hanging it up...

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[Rmd8136]

The left side (side with no play) stays jammed against the interior plate, leaving all the space on the outside edge. I am convinced that either the steel block hole is not machined parallel to pin Or the carrier edge plates have their holes drilled such that the pin is not parallel to the hole in the steel block. There is no way the block stays jammed against the interior plate unless it is trying to slide to the "lowest end". All it would have to be is 1/16 inch or more to make it slide one way with such large forces. Even with no load it would stay on the side furthest away. I'll bet that pin was hard to insert during loader installation.

 

[Rmd8136]

How do you change that timing?

 

[adirondackmtnman]

As far as i know, during loader install, the bucket is hooked to the Q.A. plates, then the timing rod is set...that rod acts in place of an attachment when you don't have one hooked to the loader keeping the plates synchronized...could be the rod got tweaked during install. Not sure if there is an adjustment there...

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[adirondackmtnman]

Here is a link to the Deere website, looks as though a messed up timing rod could cause alignment issues, and possibly thereby binding issues. Although your loader isn't listed here, it doesn't mean you couldn't have the same problem:

Bucket Cylinders do not Extend Equally : Bucket cylinders and loader quick attach brackets are held in alignment by the timing rod.

 

[Tx Jim]

I'll bet the timing rod on a relatively NEW frt end loader isn't the problem!!