3720 and 970 with an MX6 rotary cutter?
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Thread: 3720 and 970 with an MX6 rotary cutter?

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    3720 and 970 with an MX6 rotary cutter?

    Hey all, I hope all is well. I have an 85 acre farm/camp and own an old 970 and a newer 3720. Iím looking to buy a rotary cutter and bigger is better based on the fields that need mowed. Therefore I would like to have a 6ft cutter but the minimum required hp is 30, which is the pto hp of both tractors . Anyone with experience on using the minimum pto hp with this cutter?

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    3720 and 970 with an MX6 rotary cutter?

    No experience with your tractors or cutter, but I use a RC2060 that requires 19.2 pto hp on a 2025R that has 18 pto hp with no problems.
    I believe as long as you are meeting the minimum hp requirements you should have no trouble. If you got into real thick stuff you could always take a smaller cut.
    Last edited by PJR832; 02-27-2019 at 07:46 PM.
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    J-RAM's Avatar
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    Maybe consider a RC2072 instead. Its probably more appropriately sized for a 3 series, mostly because of weight.
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    SRG
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    That's 5hp per foot of cutter, which is the general rule of thumb guideline when it comes to PTO powered implements. I run a 5ft cutter behind my 25PTO HP 870 and it will go threw some pretty gnarly stuff, without issue. The MX6 weighs just over 1000lbs, which is well within both of those machines 3pt lift capabilities (970=2,000lbs, 3720=2,500lbs), and minimum required PTO HP for the MX6 according to John Deere, is 30HP. They both ought to handle that cutter pretty easily
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    I cut brush and grass with a 2038 (32pto hp) and 72" agco rotary cutter without any problems at all. Most of the time I'm doing it at half throttle. If you have acreage you'll be fine with a 6' mower and might even consider a 7' mower.
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    I had a 3046r and the MX6. I loved the MX6. I would never look at the frontier line of cutters as they are very weak and you canít back up without bending the rear chain holder/guard.

    The MX6 is the biggest that the 3046 can handle. It picked it up no problem but would bog down pretty hard in the tall stuff. I did have the cab so some hp was robbed by the air conditioner. YouTube milharri and watch my videos with it.


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    Quote Originally Posted by Milharri View Post
    I had a 3046r and the MX6. I loved the MX6. I would never look at the frontier line of cutters as they are very weak and you canít back up without bending the rear chain holder/guard.

    The MX6 is the biggest that the 3046 can handle. It picked it up no problem but would bog down pretty hard in the tall stuff. I did have the cab so some hp was robbed by the air conditioner. YouTube milharri and watch my videos with it.
    According to the specs I found, the 3046r and the 3720 are pretty close hp wise - both at the engine and the PTO.

    I have a 3520, so I'm closer to the 30HP PTO than the OP is at approx 35HP PTO. I'm looking for a cutter and found an MX-6 this morning, but you're making me wonder if my tractor will be OK with it. MX-6 specs say a minimum of 30HP, so theoretically I'm OK, but I'll actually be cutting brush (honeysuckle) and not grass. Will that made a difference for me (and the OP, depending on what he's cutting)? Does brush require more or less HP than grass/weeds?
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    It may just depend on how thick either is. (brush vs. grass)

    My opinion is how dense the material is will dictate the HP required.

    If it is brush your cutting, that would make me want the MX even more. It has a heavier deck that can withstand all the crap flying around under it.

    Honeysuckle..... I'm starting to hate that stuff as much as briars and poison ivy.
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    Quote Originally Posted by mark02tj View Post
    According to the specs I found, the 3046r and the 3720 are pretty close hp wise - both at the engine and the PTO.

    I have a 3520, so I'm closer to the 30HP PTO than the OP is at approx 35HP PTO. I'm looking for a cutter and found an MX-6 this morning, but you're making me wonder if my tractor will be OK with it. MX-6 specs say a minimum of 30HP, so theoretically I'm OK, but I'll actually be cutting brush (honeysuckle) and not grass. Will that made a difference for me (and the OP, depending on what he's cutting)? Does brush require more or less HP than grass/weeds?
    I would say to go for it! I donít have much experience with Honeysuckle but I think it more of a weed than brush but I could be wrong. Youíll be amazed at how well it cuts and how durable it is.

    In standard stuff it did just fine and I could go all out in A range without missing a beat.

    I just took my 2038r and MX5 out and it is a great combination so the MX6 should be just fine for yours. Just know that when the weeks are think and 10í tall that you have to slow down pretty good.


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    Quote Originally Posted by rtgt View Post
    It may just depend on how thick either is. (brush vs. grass)

    My opinion is how dense the material is will dictate the HP required.
    I agree with rtgt, we mainly only cut pasture grass and fields not worth of making hay, I've had thick grass bog me down a little at times. Any thick material will at times build up under the deck and that where the HP comes in handy. Even tedding our first cutting hay will occasionally make the Ford 5000 work.
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