Pottinger Novacat

[Allsorts]

Monday morning!! Trying to set up new mower, do I run it at 540rpm or 1000rpm. Cheers.

 

[FarmerFrank88]

What sort of novacat, front or back, conditioner or not, surely there would be a sticker on the headstock or gearbox somewhere

 

[ColinV6]

1000

 

[Dog Bowl]

Just had Pottinger reps out this morning discussing new mowers - they said they all run on 1000rpm!

 

[Chips]

On our 307t novacat you flip the swivel gearbox to change from 1000 to 540

 

[ColinV6]

On our 307t novacat you flip the swivel gearbox to change from 1000 to 540

What’s the advantage of that? Surely all tractors nowadays have a 1000 mode....?

 

[Chips]

I think some McCormicks had a choice of 540/540 e or 540/1000

 

[e3120]

What’s the advantage of that? Surely all tractors nowadays have a 1000 mode....?

Run in 540E. That's what I do with a single 3m. Saves the turf if nothing else.

 

[FarmerFrank88]

Running a pto shift at 1000 rpm will wear it out alot faster than running it at 540, also as said above some tractors have 540 e but no 1000e so can save fuel

 

[335d]

Running a pto shift at 1000 rpm will wear it out alot faster than running it at 540, also as said above some tractors have 540 e but no 1000e so can save fuel

Really?
For the same application, running a shaft faster will result in less torque transmitted through the shaft.
So theoretically, it will be easier on the shaft component.
Thats why high power requirement implements run at 1000rpm, so they can use smaller shafts.
the other example is the massive half shafts used on a Fordson major. They run at the same speed as the wheels.
modern tractors have the reduction gears in the hubs, so the half shaft spins faster, so doesn’t need to be as thick.

 

[Frankzy]

As been mentioned on trailed Pöttingers you can flip the swivel gearbox for when you only have 540e and no 1000e but other than that they're always 1000 pto AFAIK.

 

[FarmerFrank88]

Really?
For the same application, running a shaft faster will result in less torque transmitted through the shaft.
So theoretically, it will be easier on the shaft component.
Thats why high power requirement implements run at 1000rpm, so they can use smaller shafts.
the other example is the massive half shafts used on a Fordson major. They run at the same speed as the wheels.
modern tractors have the reduction gears in the hubs, so the half shaft spins faster, so doesn’t need to be as thick.

I get that but surely a universal joint that's not running dead straight had to oscillate back and forth as the shaft turns and I would've thought doing that 1000 times in a minute will wear out the roller bearings faster than if they only had to go around 540 times a minute. Maybe I'm wrong but in my head that makes sense

 

[Frankzy]

I get that but surely a universal joint that's not running dead straight had to oscillate back and forth as the shaft turns and I would've thought doing that 1000 times in a minute will wear out the roller bearings faster than if they only had to go around 540 times a minute. Maybe I'm wrong but in my head that makes sense

Well the U-joint will experience twice as much torque while spinning in 540 and while I haven't read up on any studies I would guess that higher loading puts a lot more stress on the material than higher rotational speed would.

 

[Tarw Coch]

I get that but surely a universal joint that's not running dead straight had to oscillate back and forth as the shaft turns and I would've thought doing that 1000 times in a minute will wear out the roller bearings faster than if they only had to go around 540 times a minute. Maybe I'm wrong but in my head that makes sense

Must admit I’ve often wondered that, I suspect grease is your friend