Komatsu D21A-3 vs. Komatsu D31EX-22

2 reasons to buy Komatsu D21A-3:

Power measured at

2450 rev / min and 2200 rev / min

10 % more or 250 rev

Specific ground pressure

28.4 kPa and 46.1 kPa

38 % less or 17.7 kPa

Cut depth

390 mm and 320 mm

18 % more or 70 mm

Clearance

315 mm and 310 mm

2 % more or 5 mm

Fuel Capacity	195 l. and 60 l.	69 % more or 135 l.
Cooling system fluid volume	18 l. and 14 l.	22 % more or 4 l.

Full power	59.7 kW and 27.6 kW	54 % more or 32.1 kW
Displacement	3.3 l. and 2.6 l.	21 % more or 0.7 l.

Maximum reverse gear	8.5 km/h and 6.4 km/h	25 % more or 2.1 km/h
Maximum forward speed	8.5 km/h and 6.9 km/h	19 % more or 1.6 km/h

Track shoes number per side	40 and 37	7 % more or 3
Rolling bearings number on either side	6 and 5	17 % more or 1

Width	2300 mm and 2550 mm
Height	565 mm and 840 mm

Length with blade	3450 mm and 4175 mm
Width between caterpillar tracks	1540 mm and 1910 mm
Height to cab upper part	2085 mm and 2760 mm
Caterpillar track length on ground level	1675 mm and 2185 mm

Working weight

3430 kg and 8190 kg

Transmission type	HS and dual path hydrostatic transmission
Forward gears number	3 and 3
Reverse gears number	3 and 3

Standard shoe size	300 mm and 400 mm
Track width	1190 mm and 1510 mm

1. Length with blade	3450 mm	1. Length with blade	4175 mm
2. Width between caterpillar tracks	1540 mm	2. Width between caterpillar tracks	1910 mm
3. Height to cab upper part	2085 mm	3. Height to cab upper part	2760 mm
4. Caterpillar track length on ground level	1675 mm	4. Caterpillar track length on ground level	2185 mm
5. Clearance	310 mm	5. Clearance	315 mm

7. Track width	1190 mm	7. Track width	1510 mm
8. Standard shoe size	300 mm	8. Standard shoe size	400 mm