Komatsu D31EX-22 vs. Komatsu D21A-3

10 reasons to buy Komatsu D31EX-22:

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

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

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

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

Working weight

8190 kg and 3430 kg

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

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

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

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