Whining spool valve.

(quoted from post at 11:47:40 10/27/12) Greetings from the tip of Lake Superior. I acquired a 48 front mount 12v this spring. I've been fixing mechanical issues all summer and finally got to the loader. It's a Paulson light duity, originally a trip but converted to hydraulic with a single center mounted ram. It has a front mounted pump. Up and down work fine but when I move the bucket the motor loads down and something whines. A dowel and an ear later the sound is loudest at the front of the spool (the side furthest from the handle). I took the valve apart from what I can see its fine. No grooves in the body or piston it's an energy valve BTW. I removed the lines from the ram and figured I would try to extend it manually. I couldn't do it would not even budge. Is this typical or might this be my problem?

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(quoted from post at 10:42:27 10/27/12) Sounds like the cylinder piston rod is bent which can happen if the engineering of the bucket cylinder was poorly done. Once that rod gets bent it will lock the cylinder up so you can not extend it with hyds and can be a real bear to ever extend with out taking the cylinder apart and even then can be very hard to do

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(quoted from post at 11:46:41 10/27/12)

(quoted from post at 10:42:27 10/27/12) Sounds like the cylinder piston rod is bent which can happen if the engineering of the bucket cylinder was poorly done. Once that rod gets bent it will lock the cylinder up so you can not extend it with hyds and can be a real bear to ever extend with out taking the cylinder apart and even then can be very hard to do

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Nice call
I've seen cooked spaghetti noodles that hold their shape better than that rod. Can a shop straighten that or do I need a new one.
Then to figure out why it bent.

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(quoted from post at 12:59:46 10/27/12) Pretty common size cylinder I probably have 3 plus of them laying around but then I do have a good number of them on hand. Before I would even think about putting another one on I would look things over extra good to see where it hangs up and causes it to bend. I have snapped those rod in to because of not having the correct cylinder or poor engineering

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(quoted from post at 17:42:05 10/27/12)

(quoted from post at 12:59:46 10/27/12) Pretty common size cylinder I probably have 3 plus of them laying around but then I do have a good number of them on hand. Before I would even think about putting another one on I would look things over extra good to see where it hangs up and causes it to bend. I have snapped those rod in to because of not having the correct cylinder or poor engineering

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It was whining when I got the tractor I know the PO was digging ditches in sandy loam with the 6 foot snow bucket on. I'm hopeful the extra forces in pushing that huge amount o soil did the rod in. I've already checked to be sure neither the rod or case make contact with the loader frame beyond that I'm not sure what besides abuse would bend the rod. Open to hints.

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(quoted from post at 17:45:50 10/27/12) Bad cylinder or hose. I've seen hoses have the inside lining collapse and completely restrict the flow of oil. But if you can't move the cylinder with both hoses off it's got to be the cylinder

Zane

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(quoted from post at 07:22:31 10/28/12) This really has nothing to do with your problem, but a couple of weeks ago I was putting a really old big Ford loader on a friends 3000 Ford tractor and one of the bucket cylinders had the hoses off for years and water had collected in it and lived there for years so I decided to take it apart to see if I could free it up and hone it etc and save a lot of money for my friend.

I decided to tie it to a big poplar tree with my big 3/8" logging chain and use my old Ford F600 with it's 10,000 pound winch to pull it apart after the end cap was removed. On the first try the old 5/8" cable on the winch parted. I cut off about 10' and then with two heavy snatch blocks I started pulling on the cylinder again and the truck started moving, dragging the
chained chocks along with about 6" of sod and dirt. I then tied the heavy pipe front bumper to a Pecan tree about 1' in diameter and started pulling again with the three part cable set up. The rod moved out about an inch and when it did lots of the leaves of the Pecan tree fell off and rained down on the front of the truck. Gritted my teeth and let it keep on pulling. My dog Hobo was behind the big Poplar tree watching me when with a loud bang my 3/8" log chain broke and swung around the tree almost hitting Hobo. He was a blurr going around the shed last time I saw him that day!

The cylinder is lying on the ground beside my shop and one day I am going to try it again and use a Rose budd while pulling to see if can get it apart.

If I had some Nitroglycerin I'd pour some in the port and set it off with a remote device with it about a mile away with it burried in a hole about 10' deep and see if that would get it apart????

I bought a cheap cylinder from Surplus center and finally got the loader fixed and delivered. I made $250 for about a weeks work. I'm doing good!

Hope you have better luck with your cylinder.

Zane

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