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Branch logger Used one or for sale?


Jammyjohnston
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15 hours ago, Woodworks said:

Yes, we have had a couple. Started off with a Urban TR70 and now have this one 

 

I imagine when using a small  tractor the engine stalls before the shearpin breaks  but with a larger tractor breaking the shearpin becomes a problem?

 

So if it has a large flywheel logic would suggest running it faster overcomes the stalling  but then does the power requirement go up as there are more cuts in a given time so the small tractor then cannot cope with a long large log?

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4 minutes ago, openspaceman said:

I imagine when using a small  tractor the engine stalls before the shearpin breaks  but with a larger tractor breaking the shearpin becomes a problem?

 

So if it has a large flywheel logic would suggest running it faster overcomes the stalling  but then does the power requirement go up as there are more cuts in a given time so the small tractor then cannot cope with a long large log?

It turns out I did not have the right shear pins and can go up a strength. Not used since I got them. If you go fast it tends to make a slightly messier product and speed is not an issue with these machines. I can fill an IBC in 10 mins with ease and probably faster if you had nice long thinnings. 

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I imagine when using a small  tractor the engine stalls before the shearpin breaks  but with a larger tractor breaking the shearpin becomes a problem?
 
So if it has a large flywheel logic would suggest running it faster overcomes the stalling  but then does the power requirement go up as there are more cuts in a given time so the small tractor then cannot cope with a long large log?

I’ve stalled a 35 horsepower tractor with a branch logger. Not a slow stall along a long branch but stopped absolutely dead as a thick butt went in. I was amazed nothing broke, by design or otherwise.
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14 minutes ago, AHPP said:


I’ve stalled a 35 horsepower tractor with a branch logger. Not a slow stall along a long branch but stopped absolutely dead as a thick butt went in. I was amazed nothing broke, by design or otherwise.

Old New holland balers used to have shear pins on the flywheel to prevent the energy in the flywheel damaging the  mechanism if a hard foreign object got in the packing chamber but also had a slip clutch built into the pto  .  The mowers tended to have a torque limiting pto shaft. I'd hunt around for one of them to replace a simple PTO shaft.

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