T200 Spool valve repair questions

siduramaxde · Nov 23, 2013

So my T200 is starting to act up. When I have something heavy on the boom (i.e. Pallet of brick, bucket full of rock) it is hard to vary the speed at which the boom goes down. With the load on the boom it either goes down real fast or real slow. It seems there is no in between. Also, it only seems to do this when there is a load on the boom. Unloaded it acts normal. Going up with the boom is fine. On another note, it has become very hard to engage the float function. My question is does this sound like a spool valve problem? If so, what should I look for when I disassemble it. I have a manual for the machine and it is foot controls. Thanks in advance.

siduramaxde · Nov 27, 2013

Found the problem. It was the detent springs and bearings on the boom valve.

Tazza · Nov 28, 2013

siduramaxde said:
Found the problem. It was the detent springs and bearings on the boom valve.

Glad it was a simple fix. I think this area shoudl have had a little more thought put into it. There is limited lubrication of the balls and housing they lock into. It works and works well, but it does fail and can lock things up pretty good if left long enough.

siduramaxde · Dec 5, 2013

Tazza said:
Glad it was a simple fix. I think this area shoudl have had a little more thought put into it. There is limited lubrication of the balls and housing they lock into. It works and works well, but it does fail and can lock things up pretty good if left long enough.

I ended up taking the whole valve assembly out of the loader to work on it. If I had it to do over again I probably could have left the valve in the loader. Taking the spools out of the valve would have been tough due to the confined space but probably easier than taking the valve assembly out. Since I didn't know the root of the problem I thought it would be nice to inspect the valve while it was on the bench. In my case, the detent balls had worn a grove into the cap that covers them. The detent balls were also rusty and there was moisture in the detent area. This was the reason why my boom lift and lower was not smooth. Also explains why the boom did not want to function at all when the machine was left out in sub freezing temps (detent balls were frozen with water/moisture). $20 in parts and lots of time and I'm back in business.

Tazza · Dec 5, 2013

siduramaxde said:
I ended up taking the whole valve assembly out of the loader to work on it. If I had it to do over again I probably could have left the valve in the loader. Taking the spools out of the valve would have been tough due to the confined space but probably easier than taking the valve assembly out. Since I didn't know the root of the problem I thought it would be nice to inspect the valve while it was on the bench. In my case, the detent balls had worn a grove into the cap that covers them. The detent balls were also rusty and there was moisture in the detent area. This was the reason why my boom lift and lower was not smooth. Also explains why the boom did not want to function at all when the machine was left out in sub freezing temps (detent balls were frozen with water/moisture). $20 in parts and lots of time and I'm back in business.

Glad it's back in and working as it should.
I'm not a fan of the detent design, but i guess there are limited options available. I'd like to see the cap air tight so moisture doesn't get in and rust anything (i have had a few that were rusty over the years).

T200 Spool valve repair questions

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