Draft Control

   / Draft Control #1  

ebeacham

Silver Member
Joined
Sep 15, 2002
Messages
163
Location
Southport NC
Tractor
TYM 723
Anybody out there that can tell me how draft control is SUPPOSED to work. Are you supposed to be able to set it and the implement return to that position after you lower it. Mine won't do it with a landscape rake attached. I am thinking it might be too light...
 
   / Draft Control #2  
Someone might tell us different but I don't think that draft would make any difference using a landscape rake. Draft control is designed for heavier implements that are pulling a draft.
 
   / Draft Control #3  
Eric, basically position control will let you do what you are saying. Draft control is something else entirely. Personally, I don't know of any use for it except for pulling implements that are into the ground; i.e., plows and such. If the plow is pulling easily, then it can go deeper into the ground, and if you come to a place that it's pulling too hard, it will raise to a shallower depth until the going gets easy again, and will then go back down deeper.

Over simplification perhaps, but that's the basics as it was explained to me by a farmer who used it (I've never used it personally). It keeps you from bogging down if the going gets too hard. /forums/images/graemlins/wink.gif
 
   / Draft Control #4  
That's pretty doggone close, Bird.

The more the load increases on an implement such as a bttom plow for example, the more force it exerts pushing back against the top link at the tractor connection as the plow tries to rotate around the lift arm connections. The tractor top link connection is basically a spring loaded valve assembly. When the load, or otherwise stated pressure against the top link, exceeds the current draft setting, a valve will be actuated to raise the lift arms to decrease the load, and visa versa.
 
   / Draft Control #5  
Bird,

The principal purpose of draft contol is to put more weight on the tractor and increase traction. (Does raise implement ever so slightly - pull a little easier.) In the 70's, Allis Chalmer even made a devive (attached to 3 PH) that would left up on the pole of pull implements.

Bob
 
   / Draft Control #6  
In this case we're both right, Bobvt. When I farmed many moons ago, the function you described was known by my color as "Weight transfer pressure control" and was a funtion of the draft system. This system would exert a specific controllable lifting force on the 3PT arms irregardless of their postion . A commonly seen application would be a short (approx 18") swiveling boom pole attached to 3PT hitch. It would be attached by chain to the tounge of an implement such as a trailer disc approx. 36" from the tractor hitch point at the belly bar. Physics dictate the amount of downward force on the tractor would far exceed the lifting force of a large disc extending 15' or more behind.

The draft control concept of attached 3PT implements was perfected years ago by Ferguson. The "Ferguson System" was the standard by which all others were judged. Ive been away from active farming since 1984 and admittedly are a little out of touch, however I can state with complete conviction to my knowledge no manufacturer has improved on his system.

The draft control setting was so sensitive and precise on small tractors like the MF135 that if it were properly set you could literally stand behind the tractor and cause the lift arms to raise by pushing in on the top link receiver with your hand.
 

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