4720 Capability

[farmboy12]

Not looking, just wondering. Could a 4720, with the 58hp, loaded R1s, loader, and cab, which, put together would = very heavy. Do you think this tractor with eHydro could pull a 12ft disc in low range? Thanks!


Kyle

 

[Wombat125]

Do you think this tractor with eHydro could pull a 12ft disc in low range? Thanks!

I'm guessing that you are going to get a lot of responses that basically boil down to: depends on the disc and depends on the soil.

With a light disc, set conservatively, in loose soil it would probably pull fine.

Heavy disc, set aggressively, in unworked soil -- Welcome to spinsville.

 

[farmboy12]

Probably medium set, medium weight. Worked ground. We are looking into a few (15) acres of potatoes. So we don't to to plow every year, because of the middle-buster used to dig potato trenches. Just enough to get ir looking nice and easy to work with.


Kyle

 

[wolc123]

Can you get it without the hydro? Not the best for heavy, ground-engaging work. If not, you could probably drop down to a 4520 with gears and get a little more useable hp to the ground.

 

[BarryinMN]

I have a 8' Deere disc that will spinout my 10k lb crawler on heavy clay sidehills. Also have a 8' Deere cultivator that will spinout my 10k lb 55pto MFWD tractor cold in light mud.

Remember tools are designed to run 3-5 mph any less and you may be wasting time.

Read the owners manual concerning extended heavy load operation.

 

[farmboy12]

Can you get it without the hydro? Not the best for heavy, ground-engaging work. If not, you could probably drop down to a 4520 with gears and get a little more useable hp to the ground.

I have a 8' Deere disc that will spinout my 10k lb crawler on heavy clay sidehills. Also have a 8' Deere cultivator that will spinout my 10k lb 55pto MFWD tractor cold in light mud.

Remember tools are designed to run 3-5 mph any less and you may be wasting time.

Read the owners manual concerning extended heavy load operation.

Thanks for the info!

I may be able to, but we're not really looking right now. So, it's pretty much just what we find.


Kyle

 

[Kyle_in_Tex]

Nope. Maybe an 8' then again depends on soil conditions.

 

[wolc123]

There seems to be quite a bit of difference between disks also. I recently picked up an old JD, 8 ft, pull-type disk that pulls easier than my 7 ft, Ford, 3 pt model. It also does a much better job with each pass. My 4120 can actually pull the 8 footer, set at the steepest angle, at about 4.5 mph over plowed ground, with the trans in 5th gear and the engine at idle speed. Since it aint a real good idea to work diesels at idle speed, I shift down to 4th gear and crank the throttle up a bit to maintain 4.5 mph at a little higher throttle. Without a doubt, the 43 hp, 4120 could handle a lot more disk and I suspect a 10 foot pull-type would be just about right.

 

[Turkeyman]

I do no think it will unless you have flat ground and fluffy soil. I spent 4 hrs today on my 4720 pulling a 3pt 7.5' disk in B range at about 3.4-3.6 mph. This was under a power line and I do not think the soil was ever disked. It was a mix of red clay and darker soil and major roots/stumps.

 

[wolc123]

I was a little mixed up in my gears on the previous post. The confusion resulted from using it on three different tractors in the last couple weeks. The 4120 actually pulls the 8 ft pull-type disk at idle in 8th gear, or 1/8-1/4 throttle in 7th gear, both at 4.5 mph (verified with gps). A 3-pt model generally will take a little more hp because the hydraulics is drawing some. After using this pull-type disk this spring I doubt I will ever use my 3-pt again unless I get a breakdown. The pull-type is so much more efficient with less power required and a better job on each pass. I do have completely flat land, and there is no doubt that hills will cost you quite a bit of hp pullling a disk of any type.

 

[jenkinsph]

An "8 ft disk" as a description is not enough of information to provide an answer.

It would depend on the weight per blade, diameter of blades and the amount of set; then the soil conditions should be considered.


If you can pull an 8 ft disk in 8th gear with a 4120 it can't be doing much good.



Steve

 

[wolc123]

Compared to the 3 pt, 7 foot, Ford disk I own, This 8 foot pull type is nearly twice as effective on each pass and pulls half as hard. That is the difference between a good pull type and a 3 pt disk. This disk looks like it probably dates from the late 40's or early 50's. It has 8 positions that are controlled by pulling a rope from the seat, and backing into it to get a steeper angle setting. The 4120, easily pulls it at the steepest setting in 8th gear. At the steepest setting it makes my aprox 20 hp (engine) Allis Chalmers C grunt a little in 2nd gear at 4.5 mph and is probably a little on the large size for that tractor, but straighten the angle a couple settings and it does fine. It is just about perfect size for my aprox 30 hp (engine), Ford 8n which pulls it fine at high rpm in 2nd gear at 4.5 mph at the steepest setting. Even though it is way undersized on the JD 4120, I use that tractor on the first several passes because fuel consumption is less than half of those other 2 tractors (due to much more efficient 4wd and deisel power vs 2wd, gas). Also, those other tractors lack power steering which makes disking a little rough on fresh plowed ground. This disk has weight boxes above all four gangs and I just run a couple concrete blocks on top of the front two. Years ago we had an 8 foot bissel that worked almost as well but left some ridges in the field and required leaving the tractor seat to adjust. This disk does a better job leveling a field than any I have used.

 

[jenkinsph]

You can pull a drag disk easily, small blades and light weight made for low hp tractors.

Today you can buy 8' disks with 16" diameter blades and about 30 lbs per blade that allow shallow penetration and can be pulled by a 35-55 hp tractor.
Or if you need deep penetration say 9" depth you can go with an 8'6" offset disk with 26-28" blades and 225 lbs per blade and can be pulled with a 70-100 hp tractor.

What you can pull width wise depends on what you need to do, scratch the surface or plow deep.


For most of the CUT tractors users participating in this forum a 3 pt disk is okay, the larger pull type disks require larger tractors to be very effective.


Steve

 

[jenkinsph]

For my 4520 I went with a 673 tiller and can get aound 7" working depth and barely cover my tracks. For a 4720 I would go with the 681 allowing a little extra width to keep the wheels on firm ground while still allowing for limited overlap.


Steve

 

[AKfish]

An "8 ft disk" as a description is not enough of information to provide an answer.

It would depend on the weight per blade, diameter of blades and the amount of set; then the soil conditions should be considered.

Steve

Very true... However, I used to pull a 12' JD disc with my uncle's old, JD 730 diesel popper (same pto HP as a 4720). Now, it wasn't one of those discs with the big, honkin' slotted blades that would cut sod - but, after 3-4 passes I'd be draggin' the gang axles thru the dirt; not over it!

That's the key... just a few more passes and you'll be as deep as you need to be!

AKfish

 

[jenkinsph]

Very true... However, I used to pull a 12' JD disc with my uncle's old, JD 730 diesel popper (same pto HP as a 4720). Now, it wasn't one of those discs with the big, honkin' slotted blades that would cut sod - but, after 3-4 passes I'd be draggin' the gang axles thru the dirt; not over it!

That's the key... just a few more passes and you'll be as deep as you need to be!

AKfish

I can picture that easily a 730 2 cylinder was maybe 3-4 tons with 38" wheels.

Still there are differences between disks as mentioned. When my dad and I started out with tractors in the early 70's small light disks is all we had. Sometimes it seemed you needed a bloodhound to find where you went.





Steve

 

[farmboy12]

You can pull a drag disk easily, small blades and light weight made for low hp tractors.

Today you can buy 8' disks with 16" diameter blades and about 30 lbs per blade that allow shallow penetration and can be pulled by a 35-55 hp tractor.
Or if you need deep penetration say 9" depth you can go with an 8'6" offset disk with 26-28" blades and 225 lbs per blade and can be pulled with a 70-100 hp tractor.

What you can pull width wise depends on what you need to do, scratch the surface or plow deep.


For most of the CUT tractors users participating in this forum a 3 pt disk is okay, the larger pull type disks require larger tractors to be very effective.


Steve

I need to go just past "scratching the surface." So, I think I'd be pretty well off.

For my 4520 I went with a 673 tiller and can get aound 7" working depth and barely cover my tracks. For a 4720 I would go with the 681 allowing a little extra width to keep the wheels on firm ground while still allowing for limited overlap.


Steve

We would us a tiller, we already have a Befco, but we're talkin 10-15 acres here. What width are those two tillers mentioned?

Very true... However, I used to pull a 12' JD disc with my uncle's old, JD 730 diesel popper (same pto HP as a 4720). Now, it wasn't one of those discs with the big, honkin' slotted blades that would cut sod - but, after 3-4 passes I'd be draggin' the gang axles thru the dirt; not over it!

That's the key... just a few more passes and you'll be as deep as you need to be!

AKfish

Right. We could probably do what we need to do with one REALLY good pass, or two regulars.


Kyle

 

[jerrynycom]

I decided to get a bottom plow and a Kuhn 53/190 Tiller, the 73" model......Worked some land this weekend and was awesome! I have a video of the plow, but not the tiller.....

YouTube - Soil prep for deer food plot

 

[jenkinsph]

Kyle, the 673 is 73" and the 681 is 81". You can set them to run shallow and pull them faster too.



Steve

 

[Greyfields]

I pull 10' drawn discs with a 4120. I usually have 4WD engaged and take the loader off whenever doing field work. It's slow going on the first passes; so I just till (shallowest setting) or plow before discing on pasture I'm working up.