New utility vehicle from Kubota - utility equipment

Kubota Tractor Corp., Torrance, Calif., has announced the development of its first utility vehicle, the RTV900. Designed for general purpose, worksite, turf and recreational applications, the new unity vehicle is available in four configurations and incorporates the same technology used on the company's tractors, which have been sold in the U.S. for more than 30 years.

Kubota entered the utility vehicle market based on the growing trends of utility vehicles and the resources it already had to produce the vehicles, said James Burnside, product manager at Kubota. "We are going to grow this business. This is going to be big growth for Kubota this year."

After three years in development, Kubota began production on the vehicles in Gainesville, Ga. Full production was slated to begin in January.

While the company may have aimed for commonality between its new utility vehicle and its tractors in many areas, Burnside said the Kubota D902 diesel engine was designed specifically for the RTV900 utility vehicle. The three-cylinder, OHV, liquid-cooled engine has an 898 cc displacement on a bore and stroke of 2.83 in. x 2.90 in. and is rated 21.6 hp. The engine features a half float valve cover with a rubber ring gasket to seal and isolate vibration and reduce noise throughout the crankcase, the company said. Engine cooling is provided by a Denso radiator The vehicle's ground drive is a hydrostatic transmission (HST) system that incorporates a shaft-driven pump, mounted to the engine block, that de livers power to a single motor. Kubota built the RTV900 vehicle's HST from the design used in its tractors. "We used the knowledge that we know on hydrostatic and tractors and built a hydrostatic transmission to function in a utility vehicle," said Burnside.

In order for the HST to provide the same low-end torque as Kubota's tractors, a second variable displacement motor is driven off the main pump. Hydraulic flow is provided to this motor through a swashplate that automatically opens when the system senses the HST is beyond its limit, the company said. Hydraulic flow can also be manually directed to the second motor by selecting the low gear range. A foot-operated pedal controls gear selection by changing the gear ratio in the trans mission through a clutchless gear shift. Vehicle operation is also available in mid- and high-speed modes.

Both two- and four-wheel drive is standard on the vehicle, "because we already make our own transmission, gears and gearboxes for all our four-wheel drive tractors," said Burnside. "To take it out of the vehicle was insignificant." Four-wheel drive is activated by a single lever inside the cab.

An independent suspension is mounted to the front axle and rear semi-independent suspension is mounted to the rear axle. The rear axle has a flexible bend to achieve semi-independent movement in the Titan International Inc. tires. Tire options include four-ply turf, six-ply knobby, heavy-duty or ATV

Also taken from its tractor line, is Kubota's power steering and wet disc brakes. The power steering is driven off the engine by a hydraulic cylinder. The brakes prevent free-wheeling during downhill travel, the company said. Additional braking is achieved by a rear wheel, hand lever parking brake.

The four configurations of the RTV900 vehicle include a general purpose model used for light labor with the option of knobby, turf or heavy-duty tires. The work site model features a hydraulic bed lift, grill guard and heavy-duty tires for application in general construction projects. The turf model, with the same features as the work site model, has a rear remote valve to run hydraulic implements for golf and landscape projects and turf style tires. The camo model is designed for the sportsman with protective grill guard, ATV tires and real tree camouflage coloring. All other models are available in Kubota's signature orange color.