Komatsu D21A-5 Crawler Dozer Specs

Category: Crawler Dozers ➔
Manufacturer: Komatsu ➔
Model: D21A-5 ➔

The Komatsu D21A-5 Crawler Dozer is a reliable and efficient piece of equipment designed for various earthmoving and construction tasks. With a powerful engine generating 39 horsepower and a gross power output of 39 hp, this machine boasts impressive capabilities. Its hydraulic system provides a pump flow capacity of 14.1 gpm and a relief valve pressure of 2204.7 psi, ensuring smooth operation. The compact yet robust design, combined with features like a standard blade capacity of 1 cu yd and a fuel capacity of 15.9 gallons, make the Komatsu D21A-5 an ideal choice for demanding worksites.

Dimensions

Komatsu D21A-5 Crawler Dozer Dimensions specifications
Ground Clearance	1.10 ft (0.34 m)
Height - Top of Cab	7.10 ft (2.16 m)
Length of Track on Ground	5.60 ft (1.71 m)
Length w/ Blade	11.20 ft (3.41 m)
Length w/o Blade	8.10 ft (2.47 m)
Width Over Tracks	5.30 ft (1.62 m)

Engine

Komatsu D21A-5 Crawler Dozer Engine specifications
Displacement	179.50 cu in (2,941.48 cu cm)
Engine Model	4D92-2P
Gross Power	39.00 hp (29.08 kw)
Max Torque	108.50 lbs ft (147.10 nm)
Number of Cylinders	4
Power Measured @	2450 rpm

Hydraulic System

Komatsu D21A-5 Crawler Dozer Hydraulic System specifications
Pump Flow Capacity	14.10 gpm (53.37 lpm)
Relief Valve Pressure	2204.7 psi

Operating Specifications

Komatsu D21A-5 Crawler Dozer Operating Specifications specifications
Cooling System Fluid Capacity	3.50 gal (13.25 l)
Fuel Capacity	15.90 gal (60.18 l)
Operating Weight	7,980.80 lbs (3,620.03 kg)

Standard Blade

Komatsu D21A-5 Crawler Dozer Standard Blade specifications
Capacity	1.00 cu yd (0.76 cu m)
Height	23.30 in (59.18 cm)
Width	7.20 ft (2.19 m)

Transmission

Komatsu D21A-5 Crawler Dozer Transmission specifications
Max Speed - Forward	2.80 mph (4.51 kph)
Max Speed - Reverse	3.40 mph (5.47 kph)
Number of Forward Gears	2
Number of Reverse Gears	2
Transmission Type	HS

Undercarriage

Komatsu D21A-5 Crawler Dozer Undercarriage specifications
Ground Pressure	4.3 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	4.30 ft (1.31 m)
Track Pitch	5.40 in (13.72 cm)

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