Draft Control vs. Position Control

[EldonC]

I'm new to the tractor game and I am thinking of buying a utility tractor to do some general purpose stuff and play with a little ploughing as well.I am learning that there is a difference in the hydraulic controls for three point hitch attachments and that position control is inferior to draft control.Could I have a little more insight into this difference?
Most of the lower end tractors seem to advertise position control.

 

[Cabinholler]

EldonC

Most tractors now have 3 positions on the 3 point lift control. In position control the main lever position is directly related to the height of the three-point hitch. In draft control the main lever actually selects the tractive force of tillage implements. In mixed control the function of the main lever is a combination of position and draft controls.

General rule for using the mode selector in the 3 positions is this: Position control is the most widely used and should be used for all implements carried in three-point hitch above ground. In this mode, three-point hitch maintains constant height depending only on the position of the main lever. Draft and mixed control should only be used for tillage. Since pure draft control can be oversensitive, mixed control is usually better. In draft control, the unit adjusts the height of the hitch so the traction force remains constant. The amount of tractive force is adjusted by moving the main lever forward increases the tractive force, or plowing depth.

Hope this is some help on draft control vs. position control. I am sure other people on this board can add more about draft vs. position control.

Cabinholler

 

[MadReferee]

Take at look at this link. it should answer most of your questions.

3pt lift types - position vs draft

 

[tinytractors]

MadReferee... I went to your posted link, and as always, one answer begets another question. Do you know of any tractors out there that have "true" position control... I don't think that I have ever ran across one. Thanks

Pete

 

[Pooh_Bear]

The 8N tractor has position control. and draft control.
The 9N and 2N tractor has draft control only.
but these two tractors can be converted to position control.

If I had to pick I would go for position control.

Pooh Bear

 

[MadReferee]

</font><font color="blue" class="small">( Do you know of any tractors out there that have "true" position control... I don't think that I have ever ran across one. )</font>

What is your definition of "true"? The full featured Kubota B-series and L-series and most of the NH tractors have the feedback linkage and circuit. What else is there?

 

[tinytractors]

If you go to the link in MadRefree's post the 8N type of control is described as "non-position".... It just lets you control when you stop after you go past where you want to be then you have to reposition by moving up to the exact level you wanted. "True Position Control" has additional linkage to automatically do all the adjusting to a preset level.

All of the tractors that I'm familiar with have a stop knob on the position control assembly that only prevents going past a certain point, and in most cases that is close enough. The "true position control" seems to be a real refinement of that concept...

Pete.

 

[tinytractors]

I went back and read the description again. Once again I was reading too much into it.
I'm going out on a limb here...but "all modern tractors have true position control".

<font color="orange"> </font> "if I could keep my mouth shut, maybe people would think that I'm a lot smarter."

Thanks for clearing it up...

Pete.

 

[JerryG]

Position control is a lift design that allows repeated implement height or depth at a certain level which corresponds with a certain location on the control slide. Every time the control lever is placed in a chosen place, the implement will be at the same location as it was the last time that the control was at the same location.