styr
New member
I have a JD770 and need to know what size rotary mower to buy
Rotary Mowers
- Thread starter styr
- Start date
- Views: 1557
deerseeker001
Super Member
- Joined
- Jul 20, 2011
- Messages
- 5,734
- Location
- Central wisconsin
- Tractor
- International 2500a with Loader
Welcome from Wisconsin
mguitas
Super Member
- Joined
- Aug 22, 2011
- Messages
- 8,080
- Location
- Schuylkill County Pennsylvania
- Tractor
- Massey Ferguson 1423 Hydrostat
:welcome:
smstonypoint
Super Member
- Joined
- Oct 13, 2009
- Messages
- 6,119
- Location
- SC (Upstate) & NC (Piedmont)
- Tractor
- NH TN 55, Kubota B2320 & RTV 900, Bad Boy Outlaw ZTR
Your tractor has 2O PTO HP and is 54" wide according to TractorData.com John Deere 770 tractor information. I am not sure what type of tires are used to measure the width (e.g., R1 vs. R3).
It would be best to have your mower at least as wide as your tractor, so a 5' model would fit. However, the rule of thumb is 5HP per foot of mower width, so 4' would be appropriate. However, each manufacturer will list the recommended HP for each of its mowers. To illustrate, I am currently in the market for a mower to fit a Kubota B2320. Bush Hog has a 4' model that requires a minimum of 15 HP. Their lightweight 5' model requires 25HP. See BH10 Series Rotary Cutters.
The manufacturer HP minimum requirements may be conservative. You may be able to handle a 5' model in cutting light material. You may have to add front weights if you don't have a FEL.
Steve
PS -- I assume that you are asking about a rotary cutter rather than a finish mower.
It would be best to have your mower at least as wide as your tractor, so a 5' model would fit. However, the rule of thumb is 5HP per foot of mower width, so 4' would be appropriate. However, each manufacturer will list the recommended HP for each of its mowers. To illustrate, I am currently in the market for a mower to fit a Kubota B2320. Bush Hog has a 4' model that requires a minimum of 15 HP. Their lightweight 5' model requires 25HP. See BH10 Series Rotary Cutters.
The manufacturer HP minimum requirements may be conservative. You may be able to handle a 5' model in cutting light material. You may have to add front weights if you don't have a FEL.
Steve
PS -- I assume that you are asking about a rotary cutter rather than a finish mower.
You have 20 horsepower at the power take off. The usual standard is 5 HP per foot. So that works out as 4 feet for you. However....ahem.....if your doing lighter cutting, willing to go slower, willing to maybe keep your blades sharper, willing to mow a bit higher, willing to take a partial cut in thicker stuff you can get a lighter duty 5 foot one to work for you. You'll need weights on the front of your tractor EVEN if your mostly level. For real. Get front weights. A Landpride 1860 is a nice choice as its really 4.75 feet wide and comes in green!
smstonypoint
Super Member
- Joined
- Oct 13, 2009
- Messages
- 6,119
- Location
- SC (Upstate) & NC (Piedmont)
- Tractor
- NH TN 55, Kubota B2320 & RTV 900, Bad Boy Outlaw ZTR
jeff9366
Super Star Member
- Joined
- Jan 14, 2011
- Messages
- 12,787
- Tractor
- Kubota Tractor Loader L3560 HST+ ~~~~~~~~~~~~~ 3,700 pounds bare tractor, 5,400 pounds operating weight, 37 horsepower
If you have a problem with a 5' 'hog mowing grass, sharpen the blades.
Briana03
Elite Member
Welcome to TractorByNet!
We moved your thread to the Attachments forum.
We moved your thread to the Attachments forum.