1/2 Remote on Kama 554

[3RRL]

I recently got a hydraulic dump trailer that has a single acting hydraulic cylinder on it. My Kama 554 has a 1/2 remote on it and supposedly, that is to run a single acting cylinder. Past research led to a couple possible answers, but I wanted to run it by the experts to confirm before I start to use it.

I took these photos a while ago when I had the top of the hydraulic box off. In the first photo, I asked what the elbow and adjusting screw on the left side of the hydraulic box are for.



Then later, after some information was returned, I found that elbow is the 1/2 remote on my Kama 554.
Here are a couple of good pictures.

[3RRL]

I was still not sure what that adjusting screw was for until Larry (gugliols) replied that he had the same question. He has a Jinma 354 with the same 1/2 remote and mystery adjusting screw like mine. This is what he told me:

Rob,

That "remote" capped off output on the left center of the TPH box is whats called a 1/2 remote. It can be used for a single acting cylinder (one hose going to the cylinder). So you only get power in one direction and gravity return. It can be used on a simple dump trailer cylinder. It cannot be used for double acting cylinders. Fluid is pumped out that one remote when you lift the TPH lever then returns back though the exact same port by gravity when you lower the THP lever.

Trouble is, in order to get that 1/2 remote to work you loose the function of the TPH arms. Unless you have a single acting cylinder dump trailer - that "remote" is pretty much worthless.

The "Mystery" bolt on the left MAY be what we turn to activate it ?


Then he got his manual out and read that the adjusting screw was to engage the 1/2 remote.

Rob,

Ok just read the Chinenglish operators "manual".
My version:
...the "mystery" Bolt is indeed what activates the 1/2 remote.
Screw it in (CW) will allow the TPH position lever to control fluid in & out that capped off 1/2 remote output. Screw it out (CCW) to restore normal TPH operation.

If we were to screw that bolt in with the 1/2 remote capped off, then raise the TPH lever we might just "dead head" the pump and blow it up.

So you un-cap the 1/2 remote elbow and turn the adjusting bolt clockwise to use the 1/2 remote. Then you can use the 3pt raise and lower lever to run the 1/2 remote. Turning the bolt back counter clockwise would again activate the 3pt raise and lower. But don't cap it off without screwing the adjustment counter clockwise and pull the 3pt levers, or it might deadhead the pump.

Well, I was not planning on using mine before, but now I want to.

My questions are:
1) Is there no relief valve for the 1/2 remote in case we forget to turn the adjusting screw counter clockwise?
2) Can I put a quick disconnect on the end of that elbow and leave it on?
3) Has anybody actually used this feature?
4) Can you tell me how far to turn the adjusting screw in (clockwise) to make it work. Does it go to a stop or something?
5) Then how far out (counter clockwise) to make the 3pt work again? If I unscrew it too far, will it fall out?

Thanks in advance,
Rob-

[GuglioLS]

Rob,

I cant say what the Kama has, but there is ZERO over pressure protection on a Jinma.

That elbow output on your Kama looks exactly like the one on my Jinma except the Jinma has a QD installed from the factory. So put one on if you like. How far to screw it in and out? your guess is as good as mine. It should work, that 1/2 remote was designed specifically for a single action cylinder dump trailer or the single action cylinder found on the Cement mixers.

I have read where someone used that 1/2 remote on a dump trailer. When the dump cylinder reached the end of it's travel and they kept putting pressure on, the TPH arms eventually lifted. The operation of that 1/2 remote is quite peculiar.

I sure would like to see you use it and give a full report on how it really works. I've never tried mine.


Larry

[3RRL]

Well, I've never tried mine either, so that's why I threw those questions out there. I also posted on TBN and got a few responses about the 200 series Jinma and how it works on them. RonMar was one of those with an interesting and informative response regarding those tractors.

Chip form Artrac was kind enough to reply as to how it works on the Kama 554.
Here's what he wrote:

Hi Rob.
You have it. the bolt looking valve diverst the oil from the lift cylinder to the "half remote"
to answer your quesitons:
1: There is a releif valve built into the lift control valve.
2: Yes, a quick connect will work OK there. Jinma often puts one on thier tractors.
3: I talked to a customer who has his laoder plumbed there (not best idea because you cannot use the 3 point and loader at same time)
4: turn in till snug (not tight) to divert to the port. loosen until 3 point works properly. Half in between will allow the 3 point and the lift arms to work together (the oil will take course of least resistance).
5: There should be a cotter pin in the "bolt" to keep it from backing out too far, but it can be forced.

I'm 90 percent sure what i am writing is accurate, its been a while since I messed with one of these.

I guess I'll be getting a fitting with a quick disconnect and try it then.
Rob-