Power harrow pto speed and forward speed

benny6910

Member
Arable Farmer
I can run my 3m Amazone combi in 540e rather than 1000 if I’m in good going. It takes less power as won’t let the boost come in on my john Deere.
 

james ds

Member
Location
leinster
Most combi drills come with a hydraulic fan nowadays so no need to run the power harrow full pelt to run fan.
Running the power harrow at a slower speed of say 600 (if conditions allow) would require more power or would be easier to drive allowing a faster forward speed?
If you are on stones ground you have to run at 1000 , otherwise the cam clutch won’t cut out when it should and you will break something else.
 

jms37

Member
If you are on stones ground you have to run at 1000 , otherwise the cam clutch won’t cut out when it should and you will break something else.
I’d agree with this, if you’ve a lot of stones, l was always told the harrow will take less harm if it’s running at the correct speed.
 

Drillman

Member
Mixed Farmer
If it’s 210 on the engine, then we have almost the same power in front. With a packer in front, lifting is no issue for me.
It says 210 on the bonnet but that’s max boost at the flywheel not what gets to the wheels

end of the day it’s a 165hp mid size Swb frame new Holland that does bloody well all things considered especially on our hills.

Although I’m sure once @Nearly posts a picture of his drilling outfit it will make us all look stupid😂😂
 

Serup

Member
Mixed Farmer
Location
Denmark
It says 210 on the bonnet but that’s max boost at the flywheel not what gets to the wheels

end of the day it’s a 165hp mid size Swb frame new Holland that does bloody well all things considered especially on our hills.

Although I’m sure once @Nearly posts a picture of his drilling outfit it will make us all look stupid😂😂
So for drilling we have the same, but for ploughing it’s a different story.
 

KB6930

Member
Location
Borders
If you are on stones ground you have to run at 1000 , otherwise the cam clutch won’t cut out when it should and you will break something else.
Cam clutch still kicks out at lower revs .

And that's one that's been adjusted up to make it stay in better amongst stones!!
 

Wellytrack

Member
I'm not fussed what it is I'm just pointing out it still kicks out fine . In our bad bits with a standard cam clutch you won't go 10yrds without it kicking out so they get screwed up a bit and they still knock out when needed

Just pointing out a slower turning shaft has more torque than a faster turning one, I’ve seen rotors in balers bent because in a light row the operator insisted on baling at 400rpm and the harm was done long before the clutch could help it.
 

james ds

Member
Location
leinster
Cam clutch still kicks out at lower revs .

And that's one that's been adjusted up to make it stay in better amongst stones!!
No it will break something before it kicks out , it takes a good bang to cut it out , so going slower the clutch does not work as safely as it should.
 

JCfarmer

Member
Mixed Farmer
Location
warks
Thanks for replies, running a power harrow at a slower pto speed takes less power therefore the tractor can pull it faster do we think?
This is the question I'm asking.
I know soil type, ground conditions, depth and clod board can influence forward speed.
Wheel eradicator tines a must in my opinion especially on ploughed/soft ground!
 

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