Specifications include, but are not limited to: Top speed at full throttle on cleared; level ground must be a minimum of 5.4 MPH. Drawbar/sprocket pull minimum 9000 lbs at 3.0 mph Machines must be able to perform draw bar operation during the hottest days of the year without overheating. ; Engine must be a current production crawler tractor engine offered by the manufacturer. Prototype or experimental engines are not acceptable. Engine must be diesel fueled, turbocharged, four-stroke cycle, liquid cooled minimum 104 net HP. Displacement must be a minimum of 4.4 liters. Fan may be blower or suction type. Finger guard required. ; A fuel-water separator with a spin-on replaceable element must be provided. Primary fuel filter must be vertically mounted. An electric engine hour meter shall be provided. It shall be activated when the engine is running. All coolant hoses shall be protected by a fire and heat protective covering. Engine shutoff shall be controlled by an electric solenoid valve. The wiring to the solenoid shall be protected by a fire sleeve. The cold weather starting aid shall be an electric engine block (coolant) heater. Ether start aid not allowed. Tractor must be equipped with a foot-operated decelerator. Engine must be equipped with a spin-on, vertical mount oil filter. ; Transmission shall be hydrostatic drive. Direct drive/Torque converter not acceptable. Transmission must be capable of full speed direction changes. Infinitely variable ratios must be available in the hydrostatic drive system. Hydrostatic transmission must be dual path design. It must feature "load sensing,” “anti-stall," and "counter-rotation." The tractor must be capable of "power turns." Turning radius must be consistent, even when travel speed is varied. ; UNDERCARRIAGE Track gauge will be no more than 70”. Tractors shall have center mounted track shoes, single grouser, 24” minimum width to 26” width. Maximum width, across the tracks, shall be no more than 95”. Length of track on ground shall be minimum of 90”. Each track shall have a minimum of seven (7) track rollers. Ground pressure of the base canopy machine (without protection package, front winch, plow, etc) shall not exceed 5 psi.