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1957 AC D17 with Offset Rotary Cutter
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RiverMountainFarm View Drop Down
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Joined: 24 Sep 2020
Location: Hopewell, PA
Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RiverMountainFarm Quote  Post ReplyReply Direct Link To This Post Topic: 1957 AC D17 with Offset Rotary Cutter
    Posted: 24 Sep 2020 at 8:59am
I recently purchased a new 3 point kit for my D17 and have started running a Landpride offset rotary cutter (worked with dealer to make sure it would work with the D17 before I bought it). I was cutting some long grass and needed to raise the cutter and noticed that the PTO shaft rubs the cross bar.  The geometry of the lift arms also seems off, no matter how straight I drive or how flat the ground is.  Here are pictures of it parked in the barn. Any advice?  Should I just remove the cross brace?  Or remove the snap couplers and attach directly to the lift arms?  I'm worried I'm putting too much stress on an old tractor.





Edited by RiverMountainFarm - 24 Sep 2020 at 1:37pm
1957 Allis Chalmers D17 | 1954 Allis Chalmers WD45
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BillinAlberta View Drop Down
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Points: 356 		Post Options Post Options   Thanks (1) Thanks(1)   Quote BillinAlberta Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 9:11am
I have a drum mower that I run with the same setup.
The weight offset like that is hard on the left arm and it never lifts straight up.
I ended up fabricobbling a new left lift arm and that helped but the "A" arm is now worn out and needs rebuilding before next year.
  The tractor handles it fine.
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RiverMountainFarm View Drop Down
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Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RiverMountainFarm Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 9:15am
Does your PTO shaft rub on the hitch when you lift?  Or is that just because it's an offset mower?


Edited by RiverMountainFarm - 24 Sep 2020 at 1:37pm
1957 Allis Chalmers D17 | 1954 Allis Chalmers WD45
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Points: 1682 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Joe(TX) Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 10:08am
Have you tried removing the cross bar? It's really not doing anything at this point. I noticed you don't have any sway chains also.
1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A
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Joined: 24 Sep 2020
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Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RiverMountainFarm Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 11:35am
The sway chains are not installed in the picture but I do have them.  If the crossbar doesn't serve a purpose, it would be easy to remove!


Edited by RiverMountainFarm - 24 Sep 2020 at 1:37pm
1957 Allis Chalmers D17 | 1954 Allis Chalmers WD45
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Points: 21866 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 12:06pm
You have 3 choices: Don't raise the mower...….remove the crossbar...…..buy a different 3-pt hitch.
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Joined: 24 Sep 2020
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Points: 5 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RiverMountainFarm Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 1:04pm
Options 1 and 3 aren't really feasible (I mean, I could buy a different 3 point, but I *just* dropped $500 on it). I was hoping removing the cross bar would be an option without many drawbacks when I posted.  Sounds like it is based on a couple of comments here...

Thx!


Edited by RiverMountainFarm - 24 Sep 2020 at 1:37pm
1957 Allis Chalmers D17 | 1954 Allis Chalmers WD45
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Points: 650 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Reindeer Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 1:09pm
When the power lift arms are pinned to the mower they don't need the cross bar to brace them. The mower 3 point keeps them in position. Should be able to remove the cross bar without consequences.
You might want to use the away chains as the load is uneven on the hitch? Just a thought.
                 
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Points: 356 		Post Options Post Options   Thanks (1) Thanks(1)   Quote BillinAlberta Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 2:07pm
I bolted the crossbar underneath the lower mount with longer bolts then promptly broke the bolts. So I chucked the damn thing under the bench and ran without(the crossbar).
  The worst part of the whole thing is the lift arms. The left one is trying to hold the entire load when lifted and it folds up under the strain.
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Points: 5097 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 2:13pm
Another example of why 3pt equipment doesn't match with older AC (Snap-Coupler) tractors. 
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Points: 1011 		Post Options Post Options   Thanks (1) Thanks(1)   Quote allisbred Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 2:55pm
Not sure what you have for a rotary cutter, if weight hangs out the right, it will push to the left when lifting. Anything offset lifting on a tractor set up with 3pt does this. If it’s what you need, sometimes you have to deal with it. The more play in the arms will allow more shift of weight transfer and off sets the load on the arms.
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Points: 1011 		Post Options Post Options   Thanks (1) Thanks(1)   Quote allisbred Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2020 at 3:22pm
We had an adapter that was rigid made by AC for our semi mount plow. The geometry was a little better (used the snap coupler) than what you have as it was made a little wider. Still was only an adapter and that’s what you would get.
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Points: 2571 		Post Options Post Options   Thanks (1) Thanks(1)   Quote AaronSEIA Quote  Post ReplyReply Direct Link To This Post Posted: 25 Sep 2020 at 5:47am
That's why I have the adapter that bolts to the drawbar.  Nothing is in the way of a PTO shaft.
AaronSEIA
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Originally posted by RiverMountainFarm RiverMountainFarm wrote:

The sway chains are not installed in the picture but I do have them.  If the crossbar doesn't serve a purpose, it would be easy to remove!

How much lateral movement of your 3 PH with the sway chains installed?

Seems to me most chain systems allow too much movement.
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Points: 2259 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian G. NY Quote  Post ReplyReply Direct Link To This Post Posted: 28 Sep 2020 at 10:08am
The P.O. of my D-17 (Series II) built his own 3PH.
There are a few things on it I don't care for but I do like his anti sway system.
With this one, I can actually set the 3 PH arms to the right or left some if necessary and there is practically no lateral movement at all.
Depending on your situation, it may not be practical to attempt to fabricate something like this for your tractor.
Those adjustable links are available at Tractor Supply.


Edited by Brian G. NY - 28 Sep 2020 at 10:12am
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