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Komatsu D21A-8 Crawler Dozer

The Komatsu D21A-8 Crawler Dozer is a compact and powerful machine designed for efficiency and productivity in a variety of job sites. With a gross power of 43.1 hp and an operating weight of 8690 lbs, this dozer offers excellent maneuverability and performance. Its standard blade dimensions, transmission capabilities, and undercarriage specifications make it a versatile and reliable choice for tackling tough earthmoving tasks.


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General Specifications

Dimensions

Height - Top of Cab8 ft (2 m)
Length w/ Blade11 ft (3 m)
Width Over Tracks4 ft (1 m)

Engine

Aspirationnaturally aspirated
Displacement186 cu in (3,048 cu cm)
Engine Model4D94LE-2
Gross Power43 hp (32 kw)
MakeKomatsu
Net Power40 hp (30 kw)
Number of Cylinders4

Operating Specifications

Cooling System Fluid Capacity3 gal (10 l)
Engine Oil Capacity2 gal (6 l)
Final Drives Fluid Capacity2 gal (6 l)
Fuel Capacity16 gal (60 l)
Hydraulic Fluid Capacity6 gal (21 l)
Operating Weight8,690 lbs (3,942 kg)

Standard Blade

Blade Angle (both directions)25 degrees
Height3 in (7 cm)
Width7 ft (2 m)

Transmission

Max Speed - Forward3 mph (4 kph)
Max Speed - Reverse4 mph (6 kph)
Number of Forward Gears2
Number of Reverse Gears2
Transmission TypeKomatsu HYDROSHIFT transmission

Undercarriage

Ground Contact Area1,570 cu in (25,728 cu cm)
Ground Pressure4.8 psi
Number of Shoes per Side37
Number of Track Rollers per Side5
Standard Shoe Size12 in (30 cm)