Walker Mowers MD21d A favorite tractor for municipal, institutional and government customers is the MD. This is in part because of the powerful Kubota, three-cylinder, liquid-cooled diesel engine. One innovation highlight of the D21d is a self-reversing fan to keep radiator clean. The D-series shares the same basic design as the T-series and is capable of using most all of the decks, implements and attachments built for the grass collection style machines. KEY FEATURES 20.9-HP, Kubota three cylinder diesel engine, liquid-cooled Electric radiator fan with reversible self-cleaning action Shock-mounted instrument panel Remote air intake for engine 10.0 bushel (12.4 cu. ft.) catcher 10.5″ (27 cm) grass handling blower Splined PTO drive shaft with quick-disconnect coupler 4.7 gallon (17.8 litre) fuel tank 7 mph (11.3 kph) ground speed Grammer suspension seat Available in Side Discharge (SD) model SPECIFICATIONS Engine: Kubota, D722, 3 cyl Displacement: 719 cc (43.9 cu in) Max Power: 20.9 hp @ 3600 rpm Max Torque: 34 ft lbs Fuel: Diesel (2-D) Fuel Capacity: 4.7 gal (17.8 litre) Fuel Consumption (per hour): 0.76 gal (2.88 litre) Cooling System: Liquid, Radiator Lubrication System: Full Pressure w/ Filter Weight: 436 kg Dimensions: 124cm H x 124cm W x 236cm