Go BottomIs a 5 bush hog too much for a Kubota 2910
 | Paul Finn
Join Date: Feb 2002 Posts: 21 Olathe, KS 
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2000-07-15 17985
I have been looking at the Kubota 2910 and the JD790. I really like the hydrostat on the 2910 better than shifting on the JD790. My only concern is the PTO hp on the 2910 is 22hp enough hp for a 5' bushhog? Help I cant decide between these machines. I have been looking since spring and my finances are finally to the point where I am ready to buy. Thanks in advance.
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| Bird Senter
Join Date: Jun 1999 Posts: 962 
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2000-07-15 17988
Paul, I have a Kubota B2710 and use a 5' brush hog. For just grass and weeds, sometimes I wish I had a 6'. The 5' brush hog should be no load at all for the B2910 unless you're really into heavy brush. For a B2910, I sure wouldn't want anything smaller than a 5'. ....
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| Alan L. Lewis
Join Date: Posts: 1
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2000-07-16 17997
I use a 5' brush hog with my 2710 also. In would not want a smaller cutter with this tractor. And it only has 20 PTO HP. ....
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| Frank R Taylor
Join Date: Posts: 1
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2000-07-17 18039
It's only when you step down to the B2400/2410 like mine that you need to worry. Kubota recommends a 4' for mine and on my hills that is probably about all it can handle comfortably. At times I wish mine would handle a 5' rotary cutter. Your B2910 should have no problem at all with a 5' and if your land is relatively flat and you don't have too many saplings to cut, you might be able to increase it to 6' but that might be a stretching a bit. If Bird thinks that his 2710 will handle a 6' mower, your 2910 shouldn't have a problem. ....
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| TomG
Join Date: Feb 2002 Posts: 5406 Upper Ottawa Valley 
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2000-07-18 18058
It depends on the size material you want to cut. Most manufacturers make three grades of cutters (heavy, medium & light). Typically, a heavy-duty cutter is rated for 3" material and has a recommended minimum 40 PTO HP. Manufacturer specs are usually on their web sites.
I think it's desirable to have a cutter that at least covers the rear tire tracks. However, many compacts lack the recommended HP for a heavy-duty cutter. On the other hand, there may be no need for a heavy-duty model. On the other hand, a heavy-duty model used with some care should work OK for occasional heavy-duty use with smaller HP tractors. Manufacturer recommendations tend to be a bit conservative anyway.
The issue really is that if you ever have a stand of heavy bush, you can't cut it easily with light duty models. A model with a slip clutch would help, since a lot of shear pins probably would be used, and damage to the cutter is possible. If the main use is expected to be in heavy bush, a smaller heavy-duty cutter may be better. Of course, take this with a grain of salt. I don't have a cutter since we prefer our bush the way it is. I'm just summarizing some past discussions. Oh yes, some people say that keeping slip clutches in adjustment is difficult.
I don't know if all Cat 1 PTO drives are equal. However, the grade of shear pin in the PTO shaft on a heavy-duty model should be appropriate for the tractor's PTO.
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