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3pt dimensions to top link

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Kim Hartshorn

08-27-1999 05:01:33




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what are the "T" dimensions for a category 1 hitch? I am assuming that distances between lift arms is 26" but what about distance to top link from the implement T". Also what is the average
length of the top link in order to keep the implement level when being raised?

Thanks

Kim Hartshorn




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Steve Hansen

08-29-1999 20:25:24




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 Re: 3pt dimensions to top link in reply to Kim Hartshorn, 08-27-1999 05:01:33  
Kim,

I made up an inverted "tee" for a combination hitch and boom pole. I wanted the leg of the tee to remain as vertical as possible throughout the lift range. I measured a bunch of equipment and concluded the heigth would be about 16". I made up the tee and let the leg run long. I mounted the tee to the lower lift arms and used a "cee" clamp to hold the top link to the side of the leg. I experimented with a number of heighth locations and upper link settings. When I was satisfied I made the top link bracket to fit. About 16" total rise from the lower link pins. Hope this helps!

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John (Va)

08-27-1999 12:52:02




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 Re: 3pt dimensions to top link in reply to Kim Hartshorn, 08-27-1999 05:01:33  
Kim,
I went out and checked four of the implements (cat 1 hitches)for the dimension you are looking for. Three (disk, culitvator, and drag harrow) had the top attachment point 16 inches above the lift pins. The bushhog had the top attachment point 17 inches up. Hope this helps you out.
John



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RMD

08-27-1999 10:42:51




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 Re: 3pt dimensions to top link in reply to Kim Hartshorn, 08-27-1999 05:01:33  
The length of the top link will vary depending on the tractor model. Some 3-point conversions for non-3 point tractors, in particular, need shorter top links than a Ford or Ferguson.



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big fred

08-27-1999 08:30:50




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 Re: 3pt dimensions to top link in reply to Kim Hartshorn, 08-27-1999 05:01:33  
on the left side of this page you can find a link to "3-Point Specs", should have the info you need.



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Kim Hartshorn

08-27-1999 08:56:57




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 Re: Re: 3pt dimensions to top link in reply to big fred, 08-27-1999 08:30:50  
The actual dimension I am looking for is the "height" of the "T" from the level of the lift arm link to the level of the top link on the implement side



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Gerald J.

08-27-1999 16:42:29




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 Re: Re: Re: 3pt dimensions to top link in reply to Kim Hartshorn, 08-27-1999 08:56:57  
The height of the top link connection on an implement varies according to the effect the designer of the implement wants. Typically the top link is shorter than the bottom links, this tends, if the vertical distance is the same on the tractor and the implement, to the implement tilting a bit forward (top towards the tractor, aft end rises more than the front) when lifted which is often a desired action. If the implement hitch height (I call this tower height) is taller than the tractor this tilt forward is made more pronounced. If on the other hand, like some double hay forks, the implement tower is shorter, it makes the implement tilt back when lifted so the double hay bale forks tend to unload the forks when lifted which is NOT good. I made some sketches on AutoCad a month or so ago to check these actions when a neighbor commented about the tendency of those double hay bale forks to unload the bale when lifted. Having the upper link shorter than the lower link makes these actions more pronounced than if all three links were the same length.

Gerald J.

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big fred

08-27-1999 13:20:04




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 Re: Re: Re: 3pt dimensions to top link in reply to Kim Hartshorn, 08-27-1999 08:56:57  
Sorry, I guess I figured it was in there. I found the SAE web page for that spec and hit a dead end. They will sell you the spec, though. Also, if you really need the info and measuring existing tractors isn't good enough, I bet you could write to the engineering department at JD or Case and they could tell you.

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John (Va)

08-27-1999 07:09:40




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 Re: 3pt dimensions to top link in reply to Kim Hartshorn, 08-27-1999 05:01:33  
Kim,
According to the 2000, 3000, 4000 and 5000 Ford Tractor Operator's Manual, the length of the adjustable upper link for most equipment is approximately 27 inches from center to center of the attaching points. Some pieces of equipment may require a little longer or a little shorter. Rear blades and scoops depend on the uppper link for the appropriate bite. Sometimes, I have to change the length just to hook up the equipment then return it to the original length. Hope that this helps.
John

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