vs.

      Komatsu D21A-5 vs. Caterpillar D7R serie II

      2 reasons to buy Komatsu D21A-5:

      Motor

      Power measured at 2450 rev / min and 2100 rev / min 14 % more or 350 rev

      Carrier

      Specific ground pressure 29.4 kPa and 75 kPa 61 % less or 45.6 kPa

      14 reasons to buy Caterpillar D7R serie II:

      Standard blade

      Cut depth 527 mm and 350 mm 34 % more or 177 mm

      Sizes

      Clearance 416 mm and 310 mm 25 % more or 106 mm

      Operation

      Fuel Capacity 479 l. and 60 l. 87 % more or 419 l.
      Cooling system fluid volume 77.4 l. and 13 l. 83 % more or 64.4 l.

      Motor

      Full power 192 kW and 29.1 kW 85 % more or 162.9 kW
      Displacement 10.3 l. and 2.9 l. 72 % more or 7.4 l.
      Cylinders number 6 and 4 33 % more or 2

      Hydraulic system

      Pump bandwidth 180 l/min and 53 l/min 71 % more or 127 l/min

      Gear box

      Forward gears number 3 and 2 33 % more or 1
      Reverse gears number 3 and 2 33 % more or 1
      Maximum forward speed 10.5 km/h and 4.4 km/h 58 % more or 6.1 km/h
      Maximum reverse gear 13.6 km/h and 5.4 km/h 60 % more or 8.2 km/h

      Carrier

      Track shoes number per side 40 and 37 7 % more or 3
      Rolling bearings number on either side 7 and 5 29 % more or 2

      Neutral reasons:

      Standard blade

      Width 2170 mm and 3693 mm
      Height 590 mm and 1524 mm

      Sizes

      Caterpillar track length on ground level 1685 mm and 2878 mm
      Length without blade 2440 mm and 4736 mm
      Length with blade 3385 mm and 5690 mm
      Width between caterpillar tracks 1610 mm and 2540 mm
      Height to cab upper part 2160 mm and 3372 mm

      Operation

      Working weight 3620 kg and 25304 kg

      Motor

      Manufacturer Komatsu and Caterpillar
      Model 4D92-2P and 3176C

      Hydraulic system

      Overflow valve pressure 15200.3 kPa and 22800 kPa

      Gear box

      Transmission type HS and Hydro-Static Transmission

      Carrier

      Standard shoe size 300 mm and 560 mm
      Caterpillar track pitch 135 mm and 216 mm
      Track width 1310 mm and 1980 mm

      Images

      Sizes

      1. Length with blade 3385 mm 1. Length with blade 5690 mm
      2. Width between caterpillar tracks 1610 mm 2. Width between caterpillar tracks 2540 mm
      3. Height to cab upper part 2160 mm 3. Height to cab upper part 3372 mm
      4. Caterpillar track length on ground level 1685 mm 4. Caterpillar track length on ground level 2878 mm
      5. Clearance 310 mm 5. Clearance 416 mm
      6. Length without blade 2440 mm 6. Length without blade 4736 mm

      Carrier

      7. Track width 1310 mm 7. Track width 1980 mm
      8. Standard shoe size 300 mm 8. Standard shoe size 560 mm