LA 402 Loader Control Problem

Hello everyone, quick question.... The loader control is sticking while curling the bucket up. I am able to unstick the lever, but would like to address the problem before it gets to the point where it stays stuck in that position.

Whats the prognosis to addressing this problem? If it's something simple I can handle it, but I have never broken down a control and rebuilt one before.... Not sure if I want to either, I would rather let a pro do it.

Thanks wolfman, I'll report back tomorrow with more info.

The valve is a Husco model # 9210-b2a D that is setup to use power beyond.

http://www.huscointl.com/wp-content/pdf/9210.pdf

I did some searching on here (which I should have done in the first place ) and found that moisture tends to work itself inside the valve and rust some of the components. I haven't had much luck finding a repair kit so I guess I'll have to consult the local stealer and see what they get to rebuild one.