importance of position control

[oosik]

Talk about flogging a dead horse. Everybody step back to their neutral corner - pull that lever - relax.

 

[GirlWhoWantsTractor]

Close but on #4 it is just a stop you can pull the lever against to only allow the small adjustment, if you bypass the stop it acts like a normal valve, no need to bump it unless you want to.

Fixed, I think. Found a video on YouTube that shows it. That's kind of a cool feature!

Here's the video: Kubota B761 Quarter Inch Valve versus Position Control - YouTube

 

[TMGT]

Fixed, I think. Found a video on YouTube that shows it. That's kind of a cool feature!

Here's the video: Kubota B761 Quarter Inch Valve versus Position Control - YouTube

Cool, I figured there were some videos out there on the subject, I'm low on data and haven't been at work so haven't been able to search for them.

 

[RGAZ]

So I'm a little confused again. Several different types of 3PH controls have been described in this thread.....

1. Old-style control lever typically found on older tractors that can only raise the implement all the way up, or all the way down.

2. Modern control lever commonly found on SCUTS and CUTS that can raise the implement up, down, or anywhere in between. May have set screws to act as stops.

3. Same as #2 but with detents to hold the lever in place and also allow you to return to the same height easily. (I want this.)

4. Dual-action lever that operates like #2, or you can move the lever to the side and bump it against two detents to raise the 3PH up or down 1/4" at a time.

5. Computer-guided height control that automatically senses the correct height needed for a perfect result and adjusts the implement on the fly. JUST KIDDING. :laughing: Or maybe ag tractors have this.

There is also a separate knob that allows you to adjust the *speed* at which the 3PH raises/lowers in response to the lever--not sure what this is called.

There is also an unrelated function called "draft control" usually found on larger ag tractors that bumps the implement up when it hits an obstacle to protect the rig from damage.

Are we getting close?

Dang! I have #2 and want #3. Mychoice between 3350SU and 3350 (non-SU) was based on not needing the mid-PTO, but did not realize the full 3350 has #3. Grrr.

Feel like I shoulda had a V8.

 

[wagne223]

Ive been wandering lately what difference position control on the 3 pt. hitch makes. I've noticed that the B seriers tractors now have it, but the bx series still do not. My main use would be box blading or using a land plane to smooth out areas of the yard . I also plan to get a tiller and wasn't sure if it affects that or not. Thanks

Position control is very nice for tilling and mowing as it allows you to repeatedly return to a specific height simply by remembering what number you were using.

For example, I mow in 4. I do not ever have to look back at the mower to set height.
Once I'm in the field, engage PTO and set 3ph to number 4 and mow.
With a quarter inching valve, every time you lower the mower, you have to look back to see and set the mower height.


It is helpful with a box blade but not as much. A quarter inching valve works well with a box blade.

With a box blade, top and tilt is more important then the type of 3ph valve.

 

[TMGT]

Dang! I have #2 and want #3. Mychoice between 3350SU and 3350 (non-SU) was based on not needing the mid-PTO, but did not realize the full 3350 has #3. Grrr.

Feel like I shoulda had a V8.

Yeah I was pretty disappointed that they got rid of position control on the SU

 

[GirlWhoWantsTractor]

Yeah I was pretty disappointed that they got rid of position control on the SU

So we're calling "position control" #3 on the list: a regular control lever but with *numbered* detents to hold the lever in place and also allow you to return to the same height easily? Finally, clarity! Eureka!

If so, I want it.

Isn't there a simple way to add some detents?

 

[TMGT]

So we're calling "position control" #3 on the list: a regular control lever but with "detents to hold the lever in place and also allow you to return to the same height easily" ?

If so, I want it.

Isn't there a simple way to add some detents?

Position control is the industry standard term for it, its not really detents but a friction hold that lets you set the lever anywhere in its range and it will stay, similar to a throttle lever.

The difference is in the control valve itself so not something that can just be added, trust me if it was I would have already done it to mine.

 

[GirlWhoWantsTractor]

Position control is the industry standard term for it, its not really detents but a friction hold that lets you set the lever anywhere in its range and it will stay, similar to a throttle lever.

The difference is in the control valve itself so not something that can just be added, trust me if it was I would have already done it to mine.

Well mine stays in place due to friction just fine. Hard to believe any control lever would NOT stay where you put it???? But there are no detents or markings.


Hmmmm, I suppose I could just draw some markings on a piece of tape and stick it on.

 

[SDT]

So we're calling "position control" #3 on the list: a regular control lever but with *numbered* detents to hold the lever in place and also allow you to return to the same height easily? Finally, clarity! Eureka!

If so, I want it.

Isn't there a simple way to add some detents?

Position control has absolutely nothing to do with detents.

Position control is closed loop.

A quarter inching valve is open loop and has no feedback.

SDT