Komatsu D21A-7E Crawler dozers research
2025
Komatsu D21A-7E Crawler dozers Technical specifications
General
Engine model
4D94E
Operating weight
3,680 kg
Operational specifications
Drive type
HS
Blade width
2 mm
Engine
Displacement
2775 cu cm
Gross power
29.83 kw
Number of cylinders
4
Dimensions
Length with blade
3.41 m
Length without blade
2.56 m
Blade height
0.59 mm
Ground clearance
0.3 m
Width over tracks
1.62 m
Undercarriage
Track pitch
13.72 cm
Tracks length
1 m
Number of track rollers per side
5
Track width
30.23 cm
Track gauge
1.31 m
Transmission
Number of reverse gears
2
Number of forward gears
2
Download datasheets
Komatsu D21A-7E vs Komatsu D21A-8
Komatsu D21A-7E Crawler dozers
Komatsu D21A-8 Crawler dozers
Engine model
4D94E
4D94LE-2
Operating weight
3,680 kg
3,941 kg
Max speed forward
-
4.35 kph
Market Average
-
-
price
-
-
Years
2025
2025
Drive type
HS
Komatsu HYDROSHIFT transmission
Blade width
2 mm
2 mm
Displacement
2,775 cu cm
3,048 cu cm
Gross power
29.83 kw
32.14 kw
Number of cylinders
4
4
Aspiration
-
Naturally aspirated
Net power
-
29.83 kw
Length with blade
3.41 m
3.38 m
Length without blade
2.56 m
-
Blade height
0.59 mm
0.69 mm
Ground clearance
0.3 m
-
Width over tracks
1.62 m
1.34 m
Track pitch
13.72 cm
-
Tracks length
1 m
-
Number of track rollers per side
5
5
Track width
30.23 cm
29.97 cm
Track gauge
1.31 m
-
Ground contact area
-
25,727.75 cm3
Number of shoes per side
-
37
Ground pressure
-
0.33 bar
Number of reverse gears
2
2
Number of forward gears
2
2
Max speed reverse
-
5.63 kph
Final drives fluid cap
-
6.06 liters
Engine oil cap
-
6.43 liters
Cooling fluid cap
-
9.84 liters
Fuel cap
-
60.18 liters
Hydraulic fluid cap
-
20.82 liters
Blade angle
-
25 degrees
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