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paul 1951 8n

06-10-2003 05:40:15




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Just wanted to know what position I should have the top link in when doing variuos jobs. I have the three position on the link right under the seat. One being closet to the tractor which hole should I have it in for discing , bushhoging and I also have a box scraper and I use the draft control when I have this implement on. I'm also going to get a plow. Thanks in advance




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'52 8N (MD)

06-10-2003 11:46:25




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 Re: top link in reply to paul 1951 8n, 06-10-2003 05:40:15  
My 2 cents is in the form of a lament. Lamenting the fact that I used the uppermost hole in the top link for the chains from my NH 951B mower that is. Yes indeed, one fine day, it broke the hardened 8N 541-B plunger and bent the 8N 540-A2 Link Assy past repair. From John Smith's pictures I finally saw the correct setup but cannot find the 9 7/8" long pin that can handle the check chains and secure the hydraulic link rocker (top link housing) at the same time. What I ended up doing was getting some 3/4" diameter Grade 8 bolts and one 1" to 3/4" bushing (the holes in the axle/diff housing are different sizes) to attach my check chains to the differential carrier. The lower center of gravity also helps out a wee bit I think. wc

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Dell (WA)

06-10-2003 07:42:19




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 Re: top link in reply to paul 1951 8n, 06-10-2003 05:40:15  
Paul..... ...respected N-Authority Palmer Fossem once said "Don't EVER pull anything with that top hole, you'll pull the gutts outta yer hydraulics".

The top hole acts as a mechanical amplifier and makes the hydraulic draft control very sensitive. It was used for shovels and sweeps tillage for weed control in row crops. Now days instead of mechanical weed hoe's, farmers use herbicide sprays.

Use the bottom hole for plowing (horizontal draft control). I use the middle hole with vertical position control, which by-passes the draft control scheme..... .....Dell

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Jim Ct

06-10-2003 06:22:25




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 Re: top link in reply to paul 1951 8n, 06-10-2003 05:40:15  
Henry is right use the bottom hole.I understand that by using the top hole you can break the entire housing off if to much force is engaged.I believe that the 3 holes were a design flaw for they don't appear on any other modles.For almost all aplications use tthe bottom.
Jim



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Ole Henry (va)

06-10-2003 05:54:30




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 Re: top link in reply to paul 1951 8n, 06-10-2003 05:40:15  
Paul, the three-hole toplink helps operate the draft/position control. As you go up the link you are exerting more force on the internals that control the draft part of the system, possibly to a point that damage may occur. For best results using the implements you describe, I would advise to use only the lower hole. The middle and top holes make good storage for spare pins.


John A



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TJW

06-10-2003 05:51:11




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 Re: top link in reply to paul 1951 8n, 06-10-2003 05:40:15  
My understanding is this, It really doesn't matter which hole for most of the implements you named since you wouldn't be using draft control on them anyway. For instance, you wouldn't use draft control to bush hog.

Plowing is the only implement you mentioned that I would personally used draft control on. For this I would used the top hole.

TJW



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Ole Henry (Va)

06-10-2003 06:04:51




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 Re: Re: top link in reply to TJW, 06-10-2003 05:51:11  
You may want to reconsider using the top hole for plowing. The operators manual (page 114) says to use the lower hole for plows. I believe the middle and top holes were for light cultivating implements that did not go into the ground far enough to activate the draft control when using the bottom hole.

John A.



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