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Old 07-03-2009, 01:19 PM   #28 (permalink)
Renze
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Join Date: Oct 2003
Location: the Steernbos (Holland)
Posts: 1,894
Default Re: Stump Grinder Finished

Quote:
Originally Posted by wkheathjr View Post
If you don't mind? May I ask why did you decide to use PTO driven instead of full hydraulic system? It would probably eliminate the risk of damaging the tractor because if the grinder gets stuck, it is the hydraulic motor that could get damaged and is easier (probably cheap too) to replace rather than to fix the PTO system?

Fecon uses full hydraulic system and its powerful hammer teeth could easily grind through anything.

I was just wondering and is it possible because it is cheaper to use PTO system or because PTO has more HP/speed than what hydraulic system can offer??
Most farm tractors have a hydraulic output of no more than 25% of their engine output, so when driving it hydraulically, you need to use a PTO driven pump. Pump plus motor plus hoses plus safety relief = big $$$

The PTO drive is much more efficient, and is protected by a slip clutch on the grinder side. (the funny looking u-joint coupler)
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1967 Zetor 3011, rebuilt trans, engine to be rebuilt this summer
1986 Zetor 5245, my old man's tractor, i just own the loader
1998 Volvo S70 TDI
2007 Volvo 440 1.9 TD based dirt buggy, under construction
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