Hello, I am down to these two models in my search for a replacement for my 2305. The 3720 and 4120 have similar HP, but the 4120 has more weight, size, and lift capability. I will use the tractor primarily for finish mowing, on hilly ground with lots of trees. But also need it to do regular tractor work - 60" tiller, 5' rotary cutter, FEL, and debris grapple. I would get R4s with both machines. I want to use the MMM on either machine, and the 3720 has the nifty quick-attach 72" MMM that in my opinion makes it that much for useful doing tasks that require the MMM off. Removing the MMM on the 2305 is not difficult, but something I don't look forward to when I go to use the tractor for non mowing work, so I really like the idea of super easy MMM removal. The 4120 has the 72" MMM option but it is not the quick-attach version, and from what I can tell it is similar to the 2305 when removing (detach the front and rear hangers, PTO, pivot the wheels and wrestle it out from the tractor). Anybody have a 4x20 with MMM that can chime in on how easy it is to remove? The quick-attach MMM seems like a gimmick, but it is actually a really nice feature. It makes going from a finish mower tractor to a FEL/grapple in the woods a lot easier.
Here is my pick for each task, and reasons. Do I have this wrong?
Mowing: 3720. Lighter weight and more maneuverable machine with same 72" MMM. Although I have read here that the 3720 can be a little tippy on hills, true? I would get the larger R4s but it still seems a bit narrow. Open station only, so maybe the CG wouldn't be too high.
Brush cutting with 5' rotary cutter: 4120. Heavier machine to plow through the brush, but overall I bet these machines would be very similar in this function. 3720 might be more maneuverable.
Tilling with 5' KK tiller: 3720. Both have about the same PTO HP, so this is prob a tossup. I give it to the 3720 just due to being lighter and less soil compaction. Also my 5' tiller would just about completely cover the tracks of the 3720, not so on the 4120.
FEL work: 4120. The 400CX has about 600 pounds, or 37%, more lifting capacity than the 300CX and the tractor itself weighs about 800lbs more. Big advantage to the 4120 in this area. I would use the 72" heavy skid steer bucket on both machines.
Grapple work: 4120. Again more lifting capacity and heavier machine. I would use the skid steer carrier and it adds a little weight itself.
So, considering that I would use it for mowing the most, I give that more importance. I don't want a machine too small to be useful in those other areas. Also, a ZTR and the tractor is not possible right now. Maybe sometime in the future, but for now I need this tractor to also be my primary finish mower. I like the idea of the JD PowerTech in the 4120, but there is nothing wrong with the Yanmar in the 3720 either. My little 2305 has been awesome and has exceeded my expectations on what it can do, even though people told me it would be too small. It clearly is too small for some tasks though. I suppose no matter how big a tractor you get there will always be some task that makes it feel too small. A tractor can also be too big and it makes sense to size the machine right for the job it will do most often, while still allowing it to do some of the other functions. The 3720 is also less expensive by a few thousand, which is something. What do you think?
Here is my pick for each task, and reasons. Do I have this wrong?
Mowing: 3720. Lighter weight and more maneuverable machine with same 72" MMM. Although I have read here that the 3720 can be a little tippy on hills, true? I would get the larger R4s but it still seems a bit narrow. Open station only, so maybe the CG wouldn't be too high.
Brush cutting with 5' rotary cutter: 4120. Heavier machine to plow through the brush, but overall I bet these machines would be very similar in this function. 3720 might be more maneuverable.
Tilling with 5' KK tiller: 3720. Both have about the same PTO HP, so this is prob a tossup. I give it to the 3720 just due to being lighter and less soil compaction. Also my 5' tiller would just about completely cover the tracks of the 3720, not so on the 4120.
FEL work: 4120. The 400CX has about 600 pounds, or 37%, more lifting capacity than the 300CX and the tractor itself weighs about 800lbs more. Big advantage to the 4120 in this area. I would use the 72" heavy skid steer bucket on both machines.
Grapple work: 4120. Again more lifting capacity and heavier machine. I would use the skid steer carrier and it adds a little weight itself.
So, considering that I would use it for mowing the most, I give that more importance. I don't want a machine too small to be useful in those other areas. Also, a ZTR and the tractor is not possible right now. Maybe sometime in the future, but for now I need this tractor to also be my primary finish mower. I like the idea of the JD PowerTech in the 4120, but there is nothing wrong with the Yanmar in the 3720 either. My little 2305 has been awesome and has exceeded my expectations on what it can do, even though people told me it would be too small. It clearly is too small for some tasks though. I suppose no matter how big a tractor you get there will always be some task that makes it feel too small. A tractor can also be too big and it makes sense to size the machine right for the job it will do most often, while still allowing it to do some of the other functions. The 3720 is also less expensive by a few thousand, which is something. What do you think?
