Loader bucket cylinder....never seen this

Andy C · Jan 23, 2014

I was putting seals in a pair of JD loader cylinders for a customer today. It is on a 30 HP or so newer (3 years old) compact tractor. The pistons on both cylinder rods were able to move bout 1/2 inch back and forth. there was also no apparent seal between piston and rod so oil could somewhat easily move between the two sides. I have had plenty of cylinders apart but have never seen this (piston always tight on rod and usually some sort of o ring sealing between rod and piston. Does anyone know why they would be designed this way? There were threads down past the face of the piston and the nut was only turned on far enough to allow this 1/2 inch movement. The one nut was finger tight but the other had red loctite on it. Any Ideas?
Thanks,
Andy

GeneMO · Jan 23, 2014

Have no idea, but only 3 years old and it's in the shop tells you something.

I have an old IH #33 loader for an M Farmall. My dad bought it used back in the 1960's. The cylinders were never worked on, and it has sat outside all these years. I could go put it on a tractor tomorrow and it would work.

Gene

Anonymous-0 · Jan 23, 2014

Work on these all the time. Nut should be tight to the piston. Rod end has stretched between thick portion and threads. When reassembling use red loc tight with oil free threads. It will stay together then.

john *.?-!.* cub owner · Jan 23, 2014

I do not know about one that new, but older single acting cylinders were that way, the pistons did not seal and could spin on the shaft, the seal was done by the packing at the end of the pistons.

Steve@Advance · Jan 23, 2014

That doesn't sound right. No way it could be designed to run loose, that would quickly pound itself to total failure.

So, the threads stop before the piston is tight to the rod? Must be an assembly or machining error.

I could see no oring seal between the piston and rod if it was sealed with Locktite, but sounds like a major shortcut.

Bob · Jan 23, 2014

Do you know the model # of the loader? If so, why not post it so your viewers (as well as yourself) could go to www.jdparts.com and pull up a parts drawing to see what's supposed to be in there?

bison · Jan 24, 2014

(quoted from post at 19:45:29 01/23/14) I was putting seals in a pair of JD loader cylinders for a customer today. It is on a 30 HP or so newer (3 years old) compact tractor. The pistons on both cylinder rods were able to move bout 1/2 inch back and forth. there was also no apparent seal between piston and rod so oil could somewhat easily move between the two sides. I have had plenty of cylinders apart but have never seen this (piston always tight on rod and usually some sort of o ring sealing between rod and piston. Does anyone know why they would be designed this way? There were threads down past the face of the piston and the nut was only turned on far enough to allow this 1/2 inch movement. The one nut was finger tight but the other had red loctite on it. Any Ideas?
Thanks,
Andy

ust be an assembly error, pistons have to tight to the rod or they won't last

ohiojim · Jan 24, 2014

dad had compact deere don't remember the size but was about 25 HP the loader cylinder polish shafts were hardened wrong and broke,deere replaced them,.. maybe deere will replace the ones you're talking about

Andy C · Jan 24, 2014

Thanks for the replies. I went ahead and made a recess for an o ring on the face of the piston and used red loctite on the threads when I tightened the piston against the shoulder on the rod. Just couldn't imagine it could have been manufactured that way, although it sure looked as if it was! Parts view showed exactly what what we had.....Go figure!
Andy

Bob Bancroft · Jan 24, 2014

I was surprised also when I found a cylinder with no seal between the rod and piston. But if it's assembled correctly (tight!) it works.

rrlund · Jan 24, 2014

We had a Freeman loader years ago that was just like you describe.

Loader bucket cylinder....never seen this

Andy C

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GeneMO

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Anonymous-0

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john .?-!. cub owner

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Steve@Advance

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Bob

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bison

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ohiojim

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Andy C

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Bob Bancroft

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rrlund

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