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Control Valve

Eric Leifson Join Date: Posts: 1

2000-01-15          11982

I would like to understand what would cause my "float" position to not hold anymore in the hydraulic control valve. It is probably dirty or something inside, and just needs to be dissasembled and rebuilt. Is that something a do-it-your-selfer can do or are there special tools and knowledge you need to repair something like that.

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Control Valve

Larry in Mi. Join Date: Posts: 1

2000-01-16          12001

Eric,
I don't know what tractor you have but I used to own a JD318 with the same problem. I obtained a technical manual and noted that this is a major project. The spring and ball that locked the float position were located in the body of the hydraulic assembly. Your tractor may be different but it was not a project that I wanted to do. Maybe if you posted your brand and model of tractor more people could help you. ....

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Control Valve

Eric Leifson Join Date: Posts: 1

2000-01-16          12003

You are right Larry, I have a Kubota B8200HST tractor. But, the loader didn't come with the tractor and is a lot newer. The loaders model number is LA350A. ....

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Control Valve

Roger L. Join Date: Jun 1999 Posts: 0

2000-01-16          12007

If you are talking about the loader control valve, I have attempted rebuilds of several of them and none have been completely satisfactory. For the float position there is usually a spring that pushes a ball into a detent. My experience is limited, but it does seem to me that this spring breaks more often than it should. If you look at your loader valve you will notice that it basically has two parallel bores, and that one of them is longer than the other because of what looks like about a two inch attachment that is screwed onto the end of the bore. Inside of that extention is where the detent mechanism lives. Take it off carefully and see if there is something very obvious. Or alternately just order another generic control valve from Northern Hydraulics or your favorite Farm store. I just bought a nice new valve for my loader for $180.00 at the Country General store. (after an attempted valve rebuild that didn't work out). The brand is Gresen; and all the hoses threaded right up. Frankly, most loaders come with cheapo valves. You can buy a better one nearly anywhere and will be surprised at how nicely that they work. ....

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Control Valve

Eric Leifson Join Date: Posts: 1

2000-02-08          12618

Thanks everyone for your help. I Noticed two end caps at the bottom of my control valve, but they were both the same length. So, I followed the shaft that moved when I motioned the boom raise and lower. Sure enough, there was corrosion in the assembly. Cleaned it up, and it seems to work fine.

Thanks again...........
E Leifson ....

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