3-Point Boom Mower Tractor Attachment

The Missouri Department of Transportation (MoDOT) Northeast District is seeking to purchase a 3-Point Boom Mower Tractor Attachment for delivery to the Elsberry maintenance building. The unit should be a self-propelled, hydraulically driven, boom type, 20’ 3-point hitch mower, which will mow to the right and rear of the right rear tire, and extend by means of an articulated, two-section boom. The primary boom structural tube should have a minimum of the following sectional properties: Torsional 74.9" Bending (Horizontal) 60.1" Bending (Vertical) 23.8". The secondary boom structural tube should have a minimum of the following sectional properties: Torsional 25.0" Bending (Horizontal) 22.1 " Bending (Vertical) 11.7". The unit should weigh not less than 3,145 lbs. The boom swivel bracket should be triple anchored with 1" thick T-1 steel. Some key features of the unit include: • A hydraulic oil reservoir with a minimum capacity of 65 gallons • A hydraulic oil suction unrestricted 1.5" ID • Hydraulic oil pressure and return system hoses that are 1" ID high pressure unrestricted • A gear type hydraulic pump and motor with cast steel housing and steel gears • A non-restrictive, electric solenoid type main hydraulic control valve • Heavy duty industrial type, nitro steel rod welded hydraulic cylinders • A spherical bearing on the rod end of the secondary boom cylinder • Three double acting hydraulic cylinders with one accumulator on the main cylinder • An electronic joystick with a 4 bank electro-hydraulic proportional valve and manual override • A self-propelled, hydraulically driven, boom type, 50” rotary mower cutter head • A cutting head with 435 degrees of combined rotation, 50" of actual cut, and weighing at least 850 lbs • A deck that is single piece formed, reinforced 3/16", 80,000 psi rated steel • A spring loaded, retractable shield for deflecting debris and as protection from knife blades • A hydraulic motor with a minimum rating of 99 horsepower • A cutting assembly that is a 23-1/4" solid 1" thick steel dish with three radial cutouts and three case hardened, threaded inserts welded into place • A spindle that is one-piece heat-treated steel, mounted in taper roller bearings • A quick attach type mast assembly to allow for easy removal and swapping of cutter heads.