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Harry Ferguson Tractors Discussion Forum

Position control device TO30

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Author  [Modern View]

09-03-2019 07:38:35

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Bought the position control device for my TO30 from Waltís Tractor. Got it installed easy enough but not sure it actually does what itís supposed to do. Maybe an adjustment issue? Not sure. Itís the device that uses a spacer on the arm and a rod to the hydraulic lever. Any videos out that shows how to make this function ?

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Jeremy in DE

09-03-2019 09:07:56

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 Re: Position control device TO30 in reply to JRHall, 09-03-2019 07:38:35  
I made one that looks functionally very like the one in your picture.

I have no videos but there are two possible adjustment problems that occur to me.

1. The friction disk on the quadrant is too tight/loose.

2. The friction disk on the lift arms is too tight/loose.

The most likely problem is that the quadrant disk needs to be loosened and the lift arm disk needs to be tightened. But that depends on exactly what your problem is.

I wish I had a video. Maybe there is one out there that someone will direct you to. I guess I could make one if needed....

When the position control is being used, as the 3pt lift arms rise the quadrant lever gets pushed forward/down. Which in turn triggers the hydraulics to drop. When the 3pt arms fall, the quadrant lever gets moved up/back which triggers the hydraulics to rise. The lift stays put because any drift up or down automatically slightly adjusts the quadrant lever to bring back to stable.

However, to actually raise or lower the lift you must override the feedback mechanism. So you pull up on the quadrant lever, the lift starts to rise, but now begins to push forward/down on the quadrant lever. You must keep holding the lever up and the friction disk on the lift arms slides. Now the 3pt is the height you want, so you let go. At this point you are not over-riding the friction so the position control device jams the quadrant lever forward as the lift arms raise thus stopping their rise and holding them right there.

If you want to lower, you push it down, hold it there and over-ride the friction disk till it drops to where you want it. Then let go and it pulls the quadrant lever up to stop the fall and hold the lift steady.

If you yank the quadrant lever all the way back (or push it all the way forward) there is a lag before the position control has time to push/pull the lever to the right position to stop movement. Thus the 3pt rises/falls further than when you let go.

In time you will learn to pull back/push forward just enough to keep the lift falling/rising and then when you let go it will hardly have to move the quadrant lever to halt movement. This makes it very precise.

So if the friction disks are out of adjustment then you cannot over ride them very well, or they just slide all the time and no feedback happens.

I hope this all helps. If this is not your problem, post back with more details of exactly what happens when you move the quadrant lever up/down.

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09-03-2019 09:27:57

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 Re: Position control device TO30 in reply to Jeremy in DE, 09-03-2019 09:07:56  
Thanks I think I understand and possibly my nut on the spring may he too loose. Trying to use this to level out a small brush hog so front doesnít dig in

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09-03-2019 07:43:27

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 Re: Position control device TO30 in reply to JRHall, 09-03-2019 07:38:35  

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