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Draft Position Control Questions

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Bill

02-14-2003 15:26:14




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I think I have an idea as to how the draft and position control operate on my MF50, but I want to run it by you folks, with a few questions.

I understand that when using position control it is to raise and lower implements to a given fixed height (like keeping a brush cutter level above the ground). When using position control, the draft lever should be in the full down position.

This is where things get a little confusing for me. I understand the concept of draft, but I am not sure I understand the total function of the draft lever's position and the contribution of the position control lever with respect to it.

I gather that when using draft, the position control lever is all the way down, except that on my Model 50 (and I am gussing the 35's too). It appears that the section of position control lever in the full down to about 1/4 up is also draft response - where full down is slow draft response and up to about 1/4 up is fast draft response. Whew!

With respect to the draft lever, full down is heavy draft and as the lever is pulled-up, draft lightens-up.

Now my questions! When plowing, how does one set the depth of the plow? Is it with position or draft? At the end of the row, how does one lift and lower the plow - with the draft lever or position control lever?

Finally, I have been told that the draft lever and position control lever should NEVER be in the up position at the same time - damage could occur in the various internal linkages. I have also been told that when the draft lever is full up, the hydro pump is in constant pumping mode. Well, here is my question. Suppose I have a post driver attached to my 3-point hitch. I use the position lever to set the height above the ground. Would I then set the draft lever to full-up for constant pumping so my remote hydraulics will provide hydraulic oil to the post driver for it's operation?

Any comments would be appreciated.

Thanks in advance!
Bill

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Olldfarmboy Jim

02-14-2003 22:10:16




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 Re: Draft Position Control Questions in reply to Bill, 02-14-2003 15:26:14  
It sounds like you pretty well understand everything you need to know about the ferguson system. If you remove the round inspection plate on the right side of the transmission (where the hydraulic dipstick is) you can watch the linkages in action and learn more in 5 minutes than most peole can tell you in an hour. The lower end of the Position Control lever, regulates how fast or slow the system responds to draft load changes when operating in Draft control mode. Use the Draft control lever to raise or lower your plow. Be sure to set the lever back to the same quadrant position by using the adjustable sector placed at the point you want to return the Draft Control lever to. Of course, this assumes that the PCL and DCL linkages are intact and properly adjusted. I've spent a fair amount of time teaching myself the Ferguson system on a nice little MF 35. TractorSmart.com and Big Dean's website are also good places to get the straight skinny on the MF's hydraulics. Hope this helps you. Good luck. Jim

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Bill

02-15-2003 18:00:57




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 Re: Re: Draft Position Control Questions in reply to Olldfarmboy Jim, 02-14-2003 22:10:16  
Thanks for the reply!

But when I am at the beginning or end of the row, do I use the position control lever or draft to raise and low the implement?

Also, say I want a beginning depth of 6". I run the tractor up on a 6 or so inch block on one side. I would do this to elevate the tractor such that I can drop the plow below grade for initial set-up. So should I set that initial depth with position or draft lever?

Thanks!
Bill

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Steve

02-19-2003 13:55:21




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 Re: Re: Re: Draft Position Control Questions in reply to Bill, 02-15-2003 18:00:57  
My experience is with a F-706, but the same procedure might apply. When making the initial setting, I set both the position and draft control levers to plow deeper than I want. Once the plow is in the ground, I use the draft control lever to pull the plow up to the desired depth. When at the end of the field, I just pull the position lever to the top to pull the plow out of the ground. To put the plow back in the ground, just throw the position lever to the bottom and the plow will stop at the draft control setting. There's no need to set or move any markers. If you want to change depth, just move the draft control lever while the plow is in the ground with the position lever at the bottom of its travel. Good Luck!!

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Bill

02-19-2003 14:56:06




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 Re: Re: Re: Re: Draft Position Control Questions in reply to Steve, 02-19-2003 13:55:21  
That is how I had envisioned doing it. Thanks! This draft stuff is really interesting.

BTW, what is an F-706?

Thanks!
Bill



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richard

02-18-2003 15:30:41




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 Re: Re: Re: Draft Position Control Questions in reply to Bill, 02-15-2003 18:00:57  
When ploughing raise and lower the plough in and out of work using the draft control lever.Draft control will not control the plough at a constant depth,but at a constant load.The Ferguson system of hydaulic control is so 'sharp'that the variation in ploughing depth will hardly be noticable.If the tractor wheel rides over a hump or down in to a hollow the draft sensing will compensate by adjusting the depth of the plough automaticly.If the plough is slow to respond move the response towards 'light' or 'fast'.If the plough is over reacting move the response towards 'heavy or 'slow'. When commencing the start of a run move the draft control towards 'lower' untill the desired depth is obtained,then move the adjustable marker next to the lever,on the next run just move the lever down to the adjustable marker to plough at the same setting as the previous run.Hope this helps.

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