if ya gong with a 3pt hitch backhoe, make sure you get the "sub frame" that fits your tractor for the backhoe.
subframe connects backhoe, to rear end, transmission, and up to front were FEL frame work is. and makes tractor a more solid unit. most backhoes can lift rear end of tractor and jar tractor pretty good.
normally when you get a backhoe with tractor, the 3pt hitch lower lift arms, top link, turn buckles, check chains, swap bar/chains are sold sepretly . make sure you get those items.
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what is not mentioned is a TNT (top and tilt) for 3pt hitch, you can replace the top link turn buckle with a hydraulic cylinder, and 1 or both side links with a hydraulic cylinder. so you can adjust the 3pt on the go. you need 1 or 2 sets of rear remotes for TNT,
other stuff...
brush guard for up in front, so your not ramming a stick or like up into an expensive radiator.
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tires
AG / R1 tires = pizza tires, they sink in and keep you going
turf tires = regular lawn mower type tread of tires.
industrial / R4 tires = width of a turf tire but tread like a R1 tire.
myself i would prefer R1 tires. they tear up the yard when wet or when you make sharp turns. BUT they keep me going no matter what.
R4 tires float on top of the mud = stuck, and requires use of "split breaks", FEL (front end loader), and backhoe to get you unstuck.
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split brakes = lock together for single rear braking, or unlock the 2 pedals for a left rear tire brake and a right rear tire brake.
personally can not live without split brakes. with all the dirt work and stuff doing you most likely will need this or rather want this.
in the SCUT (sub compact utility tractor) range, split brakes may not be offered, and if they do it is on the same side as the gas/go/hst peddle. (personally do not like). when you get into the CUT (compact utility tractor) normally get get split brakes on opposite foot than the go/hst/gas peddle.
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i am going to say you will want to be in the CUT range, so you have more ground clearance under neath, a larger frame, and more weight. vs a SCUT which resembles a riding lawn mower on steroids.
cut range = 25 to 30HP range. and more likely in the 30HP range.