indianabuckman
Member
what would be the biggest discbine a IH 856 could handle? I'm looking at about 10 to 11 feet is this to big for flat to rolling ground.
- Thread starter indianabuckman
- Start date
tomstractorsandtoys
Well-known Member
You will be fine with an 11 ft machine. I ran an 11 ft with a 4020 and sometimes pulled it in 6th gear and a 856 is a little more tractor than a 4020. Tom
indianabuckman
Member
I always heard 10 HP for every foot I wonder how true that is?
coonie minnie
Well-known Member
The conditioning rolls (or impellers) take a surprising amount of power. I went from a 14 foot mower conditioner to a 17 foot mower, and the wider mower without the conditioner took a lot less power.
Al Baker(pumpman)
Member
It all depends on what you are cutting. If you cut dairy quality alfalfa that is knee high when cutting it takes very little
power. If you cut neck high mix of legumes and grasses for beef or horses, it will eat a 100 HP tractor alive. My JD discbine is
considered 10.5 ft. So it is safe to call it a 10 footer. If I use 110 HP I can sail at the speed you could run, but drop down
to 90/95 HP 4020 now you are at walking speed if it gets heavy. I have two 4020s One will handle it in heavy hay in 5th,
Powershift one will not loose power, but will get hot if it is 80Degrees or more. I can cut with my 2950A little faster than you
can run, but it also will get hot after 30 min or so. Hp requirements are dependent on the lay of the land, and how heavy your
hay is. Will a 856 handle one, heck yes. Maybe not as fast as my 1086, but it will do a fine job, just a gear or two slower. Al
power. If you cut neck high mix of legumes and grasses for beef or horses, it will eat a 100 HP tractor alive. My JD discbine is
considered 10.5 ft. So it is safe to call it a 10 footer. If I use 110 HP I can sail at the speed you could run, but drop down
to 90/95 HP 4020 now you are at walking speed if it gets heavy. I have two 4020s One will handle it in heavy hay in 5th,
Powershift one will not loose power, but will get hot if it is 80Degrees or more. I can cut with my 2950A little faster than you
can run, but it also will get hot after 30 min or so. Hp requirements are dependent on the lay of the land, and how heavy your
hay is. Will a 856 handle one, heck yes. Maybe not as fast as my 1086, but it will do a fine job, just a gear or two slower. Al
Northvale PA
Member
I run a NI 5209 with my 4020. I keep the blades sharp sharp. My guess is blades that are rounded off
will rob you of 10 hp. I mow 1st cut in 4th gear tops. Later cuttings can go 5th up hills and 6th down. I
went with the lighter 9’ machine to take it easier on my 50+ year old tractor.
will rob you of 10 hp. I mow 1st cut in 4th gear tops. Later cuttings can go 5th up hills and 6th down. I
went with the lighter 9’ machine to take it easier on my 50+ year old tractor.
Brendon-KS
Well-known Member
- Location
- Goessel, KS
In many ways the power required by a disc mower/conditioner is directly related to the desired capacity. There's a reason why modern self-propelled windrowers are running 250+ hp engines
to push 16-ft headers - the expectation here is to be able to run 16+ mph in normal hay crops and only have to slow down to 8-10 mph in rank forage so tall you can't see over it when
driving the machine. In these conditions the header itself can be consuming 150 hp, let alone all the other power requirements on the engine. However, the power required will go down
considerably as the performance expectation is lowered. It also depends on how heavily you are wanting to condition the material. If you have the rolls adjusted down close and trying to
get the maximum amount of crimp than the power requirement will be higher, especially with thick-stemmed crops like sudex and cane. As long as you're satisfied cutting average hay crops
at 7-8 mph than your 100 hp tractor should do fine.
to push 16-ft headers - the expectation here is to be able to run 16+ mph in normal hay crops and only have to slow down to 8-10 mph in rank forage so tall you can't see over it when
driving the machine. In these conditions the header itself can be consuming 150 hp, let alone all the other power requirements on the engine. However, the power required will go down
considerably as the performance expectation is lowered. It also depends on how heavily you are wanting to condition the material. If you have the rolls adjusted down close and trying to
get the maximum amount of crimp than the power requirement will be higher, especially with thick-stemmed crops like sudex and cane. As long as you're satisfied cutting average hay crops
at 7-8 mph than your 100 hp tractor should do fine.
Tractordata shows the 856 at 94 PTO hp. My MF 1105 dynos at 118 hp and with a 9ft Krone disc mower conditioner with impellers in tall/heavy first cut
grass get along easy at 7 mph. Any faster and the ride gets to bumpy.
I think you’d be OK with a 10ft machine, but a 9ft would probably be a better fit in heavy hay unless the 856 is turned up.
The link below is cutting first cut hay last summer.
Cutting hay
grass get along easy at 7 mph. Any faster and the ride gets to bumpy.
I think you’d be OK with a 10ft machine, but a 9ft would probably be a better fit in heavy hay unless the 856 is turned up.
The link below is cutting first cut hay last summer.
Cutting hay
BarnyardEngineering
Well-known Member
- Location
- Rochester, NY
You can always slow down. Discbines let you mow faster, but you don't HAVE to run at 12MPH if you don't want to. The machines last much longer if you aren't beating them to death.
Donald Lehman
Well-known Member
We are using a JD 930, 12 footer with an 1850 which is 94 hp. It handles it well. As said below, discbines last a lot longer if you aren't trying to set a new land speed record. Better to pull a wider one a bit slower than to pull a smaller one faster. Especially if you have rocky ground.
Another consideration is the HP of the backup tractor should the primary tractor go down. Around here the windows to cut can be small and getting the hay cut has
to happen before you can worry about the next step. The one neighbor years ago cut with his biggest tractor which was 85 HP and a few decades old. Needless to
say there were days that it was not available so then it was up to the 65 HP tractor to cut. The neighbor was not enjoying those days down to under 3MPH and
watching the temp gauge like a hawk.
to happen before you can worry about the next step. The one neighbor years ago cut with his biggest tractor which was 85 HP and a few decades old. Needless to
say there were days that it was not available so then it was up to the 65 HP tractor to cut. The neighbor was not enjoying those days down to under 3MPH and
watching the temp gauge like a hawk.
indianabuckman
Member
one last question, which do you prefer for grass hay, impellers or rolls. Thanks for all your replies
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