1850 Draft Control

Kerwin

Member
This post is a follow-up to my questions yesterday. From what I can tell by looking at the parts catalog, my 1850 has "(B) Draft Control and Remote, Hydra-Lectric Internal Valve System" hydraulics. It also has the Category II 3-point setup.

The owner's manual discusses what holes to use for lower lift and draft control. However, what other linkage needs to be present for the draft control to work? What is the basic theory of operation, and can I use it without needing to use the hydra-lectric portion of the hydraulics?

Email is open if you want to reply that way.
 
Everything else is internal. There's a rod on the inside that moves slightly based on the pull on those lower links. The hydralectric and top link have nothing to do with it.

On the 1550-1600-1650,there's a linkage on the outside,left side,but like I said,it's internal on the 1850.
 
Thanks, that's what I was looking to find out. There had to be a way for feedback to the hydraulics based on the lower link movement. The parts catalog just has individual views of different parts of the system and not an overall big picture.
 
   Apparently you are a guy that wants to have details and have things proven to you.


   I have had to prove that the draft reaction was working and here is how we did it in the day.   Raise the three point hitch so that the arms are slightly above horizontal, now take a chain and hook to a stationary object, another tractor, a tree for example.   Tighten the chain and gently engage the clutch and observe the hitch, as you pull on the chain, the hitch should raise providing the front end of the lower arms are in some of the lower holes.   The reaction is caused by the rotation of the cross shaft, it has an arm going forward and pulls down on a large coil spring located between the bull gears.   The upper holes for attaching the lower arms are in the center of the cross shaft, thus will cause no rotation of the shaft.   the lower holes used will cause the most draft reaction.   Should the reaction be too much or too little, mix the attaching side to side.
 

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