Komatsu D21A-3 Crawler Dozer Specs

Category: Crawler Dozers ➔
Manufacturer: Komatsu ➔
Model: D21A-3 ➔

The Komatsu D21A-3 Crawler Dozer is a reliable and versatile machine designed for various earth-moving tasks. With a powerful 37 hp engine and a standard blade capacity of 1 cu yd, this dozer is equipped to handle a range of tasks with ease. Its compact design, measuring 8.1 ft in length without the blade, and 5.1 ft in width over tracks, ensures maneuverability in tight spaces. The machine's operating weight of 7561.9 lbs, combined with a ground pressure of 4.2 psi, provides stability and traction on all types of terrain. Additionally, with a maximum speed of 4.3 mph forward and 4 mph in reverse, the D21A-3 offers efficiency and productivity during operation.

Dimensions

Komatsu D21A-3 Crawler Dozer Dimensions specifications
Ground Clearance	1.10 ft (0.34 m)
Height - Top of Cab	6.90 ft (2.10 m)
Length of Track on Ground	5.50 ft (1.68 m)
Length w/ Blade	11.40 ft (3.47 m)
Length w/o Blade	8.10 ft (2.47 m)
Width Over Tracks	5.10 ft (1.55 m)

Engine

Komatsu D21A-3 Crawler Dozer Engine specifications
Displacement	159.00 cu in (2,605.55 cu cm)
Engine Model	4D92-1
Gross Power	37.00 hp (27.59 kw)
Number of Cylinders	4
Power Measured @	2450 rpm

Operating Specifications

Komatsu D21A-3 Crawler Dozer Operating Specifications specifications
Cooling System Fluid Capacity	3.70 gal (14.00 l)
Fuel Capacity	15.90 gal (60.18 l)
Operating Weight	7,561.90 lbs (3,430.02 kg)

Standard Blade

Komatsu D21A-3 Crawler Dozer Standard Blade specifications
Capacity	1.00 cu yd (0.76 cu m)
Height	22.30 in (56.64 cm)
Width	7.60 ft (2.32 m)

Transmission

Komatsu D21A-3 Crawler Dozer Transmission specifications
Max Speed - Forward	4.30 mph (6.92 kph)
Max Speed - Reverse	4.00 mph (6.44 kph)
Number of Forward Gears	3
Number of Reverse Gears	3
Transmission Type	HS

Undercarriage

Komatsu D21A-3 Crawler Dozer Undercarriage specifications
Ground Pressure	4.2 psi
Number of Shoes per Side	37
Number of Track Rollers per Side	5
Standard Shoe Size	11.90 in (30.23 cm)
Track Gauge	4.00 ft (1.22 m)
Track Pitch	5.40 in (13.72 cm)

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