Thanks.
Our land is steep with a number of small less steep parts that I have cleared or will clear in the future. I'm thinking manueverability is more important than the number of acres per hour that I can mow.
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If you have that type of terrain your going to need ag tires and a tractor with adjustable rear tires that can be adjusted outward for the widest stance for stability, traction and grip not R4's.
If you have granite coming up from frost heave you need to invest in landscape rake that can be mounted up front or flagging each boulder and digging it out as they will raise **** with the flail mower rotor knife hangers if the granite is close enough to the surface that it will shatter and possibly break knife mounting station and then you are stuck as the flail mower rotor will be out of balance and a new knife mounting station will have to be welded back on the rotor.
about your tires:
You will need to have them loaded with liquid ballast and also preferably to have suitcase weights in front to maintain stability and the center of gravity which is the center line through the center of the engine cradle or the mating surface of oil pan and engine block.
You have to keep in mind that your mules four tires are going to be contacting less than a square foot of ground in total
When working-YES less than a square foot of tread!!!! You should invest in a mechanical tilt meter or a digital one.
Dont overthink it; your car has less than 6 inches of tread contacting a road BTW.
When mowing steep areas above fifteen degrees you should plan on backing up and then driving down the area to be mowed as you can mow as you climb and then make a second pass on the same area as you descend with the tractor.
If you invest in the value leader flail mower you need ot plan on purchasing a wet well grinder from Micro Mark for $99.00 plus tax and shipping as you will need to sharpen the cast hammers several times during the mowing season and a wet well grinder will not destroy the temper of the hammer knife if they have been heat treated.
For the money invested a Caroni Flail Mower with a B flail mower Rotor may be a better choice BUT keep in mind that since Vrisimo is in California and you can buy parts from a local dealer a Vrisimo orchard and Vineyard flail shredder will be more cost effective in the long run as the side slicer knives are less costly to buy per unit and easier to wet grind to a sharp edge and you can maintain a 2 inch mowing height in one pass.
The other thing to keep in mind is the flail hammer knives will not let you shred the brush in a second pass to shred the brush and grass finer.
If you invest in a smaller mule such as the Kubota B series or the JD series 2 mules with loaded R-2 ag or turf tires and suitcase weights and the Vrisimo Orchard and Vineyard Shredder Flail Mower or the Caroni with the B flail mower rotor you will have a more useable mower as you can and will be able to mow brush and good sod grass without changing anything.