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How Much Does A Komatsu D21a Weight? NET HORSEPOWER 29.5 kW 40 HP @ 2450 rpm OPERATING WEIGHT D21A-8: 3940 kg 8,690 lb D21P-8: 4240 kg 9,350 lb D21A-8 D21P-8 D 21 CRAWLER DOZER Photos may include optional equipment. How much does a Komatsu d20a weigh? Cooling System Fluid Capacity 3.7 gal (14 l) Fuel