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Do I need to put the duals on?

F

fastline

Member
I have some issues with the snap on duals for my Case 1170. Needs tires, rims need work, etc, and I just don't have the time.

I need to lightly turn some thatch in 40 acres with an 18ft offset disk. My plan is to set stops with the lift cylinders to do a light cut. I have looked at some data that indicates around 100lbft per inch depth per foot width so that might indicate 1900lbft per inch of cut? Seems like a lot to me.

Regardless, I am sure some experienced farmers would have a good idea on this? Again, I am NOT planning to drop the disk down and let it eat, just need to roll the thatch a bit so I can get a cover crop seeded in.

I would think at some speed, the tractor would do it but I figure traction could become an issue. The tractor does have weights on the rears and I think weighs around 15,000 with the FIL and weights.
 
Thanks, would you have an idea how much HP is typically ideal for an 18-19ft disk if I let it drop down for a full bite?




I had the thought in mind to take off some disks to tune it for the tractor if it cannot handle the whole thing. I would think I would be ok for a light cut but if I need to cut deeper someday, it would be nice to have an idea how much the tractor will handle.
 
(quoted from post at 17:01:47 05/16/14) I always pull a 21' Case disc with my 1170, no problem. Course it's set a 145 horse.
Click to expand...

Curious what gear you run and how you handle turns with a clutch tractor?

I believe I can turn up my 1170 but the goal was not to push it if not needed. If it pops, I am screwed. From what I understand, Gears might start popping? I do not have my shop close enough.
 
I run in 4th gear low range. To turn around, slow engine speed, raise the disc, turn wheels, apply a little brake to make the turn, lower the disc, throttle up and go.
 


I guess I am trying to think about how to outline it. Fencing on two sides of a mostly square property. What fun to step into a hydroswing swather with the first pass being against the fence... Guess I might have to just go slow and plan to pickup and back up to catch the corners good?
 
If you are talking a true offset disk, dropped down, around here 200hp would be a good number for 18 foot. Probably a little more with big diameter blades.

The ones I see are rated 7-10hp per foot.

Rick
 
I forgot to add, for the offsets that are used in construction, I bet you are around 20hp per foot or more. Not sure they make those in 18 foot.

Rick
 


Is there a good way to tell the difference? The owner says it is on an offset. I usually look more at frame weight. She looks to weigh 8-10K IMO.

Case collector indicates he runs a 21ft disk but I do think he is referring to more of a finish disk. I was asking in my other post if I can repitch and tune the thing to my liking? Would seem to be about the only difference in tandem and offset is the pitch angle of the gangs? And of course the build to handle the extra load of more angle?

I also had the idea in mind to drop some discs to make it happy behind my tractor but I honestly don't really need the 12" hogging of an offset other than maybe the wife's garden in which I would just leave the wing up and run as 12ft. Hoping it would run right thought being only a single wing.
 
Looking from above, a typical disk harrow looks like an X. An offset is half of that. Looks like a sideways V. Heavy frame, larger dia, thicker disks. Meant for primary tillage.
 
Got a name and model of the disk so we have an idea of what
disk you are dealing with? Different regions can come up with
different names for such stuff, never really sure....

What size - diameter - are the blades?

How close are the blades to each other?

Is it a single gang or double gang?

Does each gang go clear across the disk, or is it in a big X
pattern?

I do have to smile a bit when you so casually mention dropping
off a few blades.... As of that is an easy task on most well used
disks.... That will be one of those learning days. :)

Are you cutting into dry sod, or working damp fresh spring dirt.
Makes a difference.

Paul
 
yeah, guaranteed, it is an offset. Looks adjustable too. However, can you really tune one for lighter work or is that more to make them run straighter or correct small issues?

Does a tandem cut shallower or is there a difference in how the soil is rolled?
 
When you say leave a wing up, I believe you are talking about a tandem disk with fold out wings. That"s what you see around Michigan for tillage. Occasionally you will see offsets, but rare. As JMS said, tandem disk frames form a "X", offset disks form a "V".

The offsets are typically much heavier and take a ton of HP more to pull, then can go deep. Heres a pic of each.

Google Allied or Alloway, they make the construction offsets.

Rick
a157154.jpg

a157155.jpg
 
No this is an offset. Forms a V, SUPER heavy construction. It has one fold up wing. We used to have a Kewanee 1020 offset with dual wing.
 
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