Disc Harrow Adjustment

[rambler]

I beleive that if you loosen your U-bolts up and move the rear gang closer togather will solve most of your problem.
kind of like this: )))))) (((((( to ))))))((((((, you will lose width but close the gap in the gangs.
david

That will mess up over the years, as now you will be throwing a ridge in the middle, so your fields will become washboard ripples/. The front gang throws the dirt far out; the rear gang needs to gather that dirt and throw it back in to the middle again.

If you move the rear gangs inward, a small ridge will be left on each side, and a ridge will be built up in the middle. There will be a small valley left near the outer ridges.

This may not appear real bad in some conditions, but over the years, or in some soil conditions, it will build up fast into a riple.

Also, it will _not_ get rid of the stripe. It will ocver it with more dirt so you don't see it right away, but - the strip is still there, and aggressive weeds will continue to grow up through the loose dirt and be there.

That middle stripe is just the nature of a double gang disk, either live with it, disk twice, or put in that middle buster which is common on real farm disks - basically a field cultivator shank placed right behind the front gang.

--->Paul

 

[milkman]

Good looking rebuild. On the old discs, the butt plates in the center of the front axles run together and that takes some of the side stress off the bearings. You can move your front gangs closer together and eliminate some of the strip but to get rid of all the strip, you'll have to fit a shank and point to get rid of all the strip.

 

[deere5105]

All good comments. Before rebuilding and repositioning, there was a time when I had the rear gangs much closer together. Seemed it caused more trouble than benefit. I too agree that will not resolve the strip in the middle.

Seems the Frontier link shows how they propose to take care of it and it likely does the job or they wouldn't offer it as an option. Now the decision is whether to install the plow to correct it or deal with the strip in multiple passes.

 

[gwdixon]

Pictures as requested. Made from scrap laying around the farm.

View attachment 269863View attachment 269864

 

[the6shooter]

Pictures as requested. Made from scrap laying around the farm.

View attachment 269863View attachment 269864

That would solve all the problems with that peskie strip. good pic too.
david

 

[hotchkiss]

I beleive that if you loosen your U-bolts up and move the rear gang closer togather will solve most of your problem.
kind of like this: )))))) (((((( to ))))))((((((, you will lose width but close the gap in the gangs.
david

agreed

 

[hotchkiss]

That will mess up over the years, as now you will be throwing a ridge in the middle, so your fields will become washboard ripples/. The front gang throws the dirt far out; the rear gang needs to gather that dirt and throw it back in to the middle again.

If you move the rear gangs inward, a small ridge will be left on each side, and a ridge will be built up in the middle. There will be a small valley left near the outer ridges.

This may not appear real bad in some conditions, but over the years, or in some soil conditions, it will build up fast into a riple.

Also, it will _not_ get rid of the stripe. It will ocver it with more dirt so you don't see it right away, but - the strip is still there, and aggressive weeds will continue to grow up through the loose dirt and be there.

That middle stripe is just the nature of a double gang disk, either live with it, disk twice, or put in that middle buster which is common on real farm disks - basically a field cultivator shank placed right behind the front gang.

--->Paul

All valid points, but in his pictures his rear gangs look really far apart. Moving them closer together my not eliminate the problem entirely but would think it would help.

 

[deere5105]

Pictures as requested. Made from scrap laying around the farm.

<img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=269863"/><img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=269864"/>

Thanks for posting the pics. I noticed the Frontier link shows the plow between the front and rear gangs and yours appears to be in front of the front gang. Any thoughts or comments as to one possibly being better than the other?

 

[deere5105]

All valid points, but in his pictures his rear gangs look really far apart. Moving them closer together my not eliminate the problem entirely but would think it would help.

Curious how closing the gap in between the rear gangs would take care of a strip of ground untilled by the front gangs. I agree and understand how it would throw more dirt to the middle, but don't see how it would contact and till the strip.

 

[npalen]

The rear gangs are ideally placed so as to "split" the front gangs. In other words, looking at a horizontal cross section of the scallops left in the soil by the front and rear gangs would see an equal pattern. The rear gang blade is (ideally) positioned so that it splits the soil bank left by the front gang blade on either side of it. This pattern will then carry across the cutting width of the disc harrow assuming that the blade spacing as well as gang angle is same front and rear. This is not always achievable in the real world where the rear gangs do have to be positioned laterally to bring the soil back in toward centerline and cover the valley without creating a ridge. Other factors enter into this level-discing process such as ground speed. depth of cut. soil type etc so it tends to become a happy medium. Most important, probably, is the leveling of the disc harrow front to rear and most will have an adjustment for this as well as tractor drawbar height.