importance of position control

[TMGT]

Hydraulic up, gravity down. Yup..
The lever is self centering from up or down pos.
If I raise or lower and let go the 3ph stays where it is unless it's forced up but I'm not sure if it stays up or falls back down after. To follow ground contour I have to hold lever in down pos while working.
I have no way to return to any specific height but when I have it set I can bump it up or down (1/4" per bump?)

It will lower back down on its own, if you go into the system you'll see that the piston fit the 3pt just pushes on a rod with no connection, that allows the lift arms to rise but det back down without moving the piston.

If you have up hold the 3pt lever in the full down position then something is out of adjustment. Lever should stay in the full down position.

 

[JWR]

Sorry, JWR, but you are simply incorrect.

Most (not all) SCUTs and some CUTS sold within the past 15 years or so do not have position control.

If you do not know the difference between position control and draft control, find a GOOD late model Ford 8N with functional draft control (most are not) (I have one if you need to inspect) and try plowing with the position/draft control lever in each position.

Having done so, post back.

SDT

Having not needed to go find an 8N, I am posting back.


1) All right, forget any reference I made to other's comments in my Post #5. Erased. Gone. I was simply incorrect in some of that as I apparently insufficiently stated in a Red edit.

2) I am not that familiar with the machines (apparently Kubota smaller tractors, maybe Deere, others) made in the last few years that have some invention on them (I will call "Other") that is neither traditional Position Control nor Position Control supplemented by Draft Control. I am very familiar with the most common 3pt controls provided for at least 50 years on most brands of tractors 1950-2000 and still provided on the vast majority of farm tractors.

3) Yes, I do "know the difference between Position Control and Draft control" rather thoroughly illustrated on my own MF 2660 without needing to go find an 8N. That functionality was inherited from the "Ferguson System" and was replicated by most manufacturers for decades. I described both Position Control and Draft Control in Post #5 accurately.

Scotty also described the two accurately (and probably more eloquently, since his was easier to understand) in Post # 10.

Unfortunately most of the posts in dialog regarding "Position Control, Draft Control and Other" have blown past the poor guy's original posted question.

 

[ThirdMan]

Is this video's presentation of the Kubota quarter inch valve accurate to other brands?

 

[MORRISONSTEEL]

It's all about price. There is a really big buying segment for scuts and a large percentage of those buyers are price motivated so it is not uncommon for entry level machines to have inching valve vs position control. Entry level machines for a lot of mfg's are missing goodies, shorter non folding roll-bars, basic seats, not as many hyd options, etc, etc, and so on. For a lot of the intended purchasers of scuts an inching valve is not the end of the world, awkward yes, but still functions just fine imao.

 

[JWR]

Maybe all you guys (who say the "inching valves" are less costly to manufacture) have some kind of insider info or profound market knowledge, BUT ... is that really cheaper to make than a plain old hydraulic cylinder and the world's simplest control valve ? I don't see why. Who said so ? Counter to the bandwagon of opinion here, my guess is that marketeers studied Harry Homeowner buyers and decided there was a sales advantage in the SCUTs market to the feature of incremental or "bump up/bump down" control. Where is the evidence for cost motive ?

 

[bcp]

The BX 1/4 inching is not a valve, it is just a couple of adjustable stops for the lever that can be used by moving the lever sideways, then quickly bumping the stop and releasing.

Bruce

 

[bcp]

Maybe it's like the people that misuse terms and it gets ingrained in them. My biggest pet peeve is the people that call a 3 point hitch a PTO.

Off topic, but this would be fun to watch on the PTO. From a CL ad.



Bruce

 

[number two]

Deceased member ChuckinNH RIP had the best description of the quarter-inching and how to use it I've ever seen.
Do a search!

 

[TMGT]

The BX 1/4 inching is not a valve, it is just a couple of adjustable stops for the lever that can be used by moving the lever sideways, then quickly bumping the stop and releasing.

Bruce

There actually is a difference to the valve spool in a 1/4in valve, it allows a small amount of fluid to flow at a certain point in the valve. If your stops are adjusted properly the valve should only let the 3pt move a small amount then stop even if held against the stop.

 

[bcp]

Interesting. Not the way my dealer explained it. Maybe it was unclear to him, too. If I hold, it moves slowly. I'll have to experiment now to see if I can find that spot.

Bruce