vs.

      John Deere 644H MH vs. Komatsu WA900-3

      8 reasons to buy John Deere 644H MH:

      Shovel

      Breakout power 152.8 kN and 665.9 kN 77 % less or 513.1 kN

      Operation

      Turn radius 5500 mm and 11065 mm 50 % less or 5565 mm

      Motor

      Power measured at 2200 rev / min and 2000 rev / min 9 % more or 200 rev

      Hydraulic system

      Lifting time 6 sec and 11.2 sec 46 % less or 5.2 sec
      Unloading time 1.2 sec and 2 sec 40 % less or 0.8 sec
      Lowering time 3 sec and 4.8 sec 37 % less or 1.8 sec

      Gear box

      Forward gears number 4 and 3 25 % more or 1
      Maximum forward speed 39 km/h and 28 km/h 28 % more or 11 km/h

      20 reasons to buy Komatsu WA900-3:

      Sizes

      Radius at maximum lifting and unloading 2450 mm and 1055 mm 57 % more or 1395 mm
      Clearance 550 mm and 473 mm 14 % more or 77 mm

      Shovel

      Unloading ground clearance at maximum lifting 4715 mm and 2962 mm 37 % more or 1753 mm
      Bucket capacity with top 13 m3 and 3.4 m3 74 % more or 9.6 m3
      Brimmed bucket capacity 11 m3 and 2.9 m3 74 % more or 8.1 m3

      Operation

      Front axle / differential fluid volume 360 l. and 27 l. 92 % more or 333 l.
      Transmission fluid volume 140 l. and 26 l. 81 % more or 114 l.
      Rear axle / differential fluid volume 360 l. and 27 l. 92 % more or 333 l.
      Static tipping weight 66140 kg and 14019 kg 79 % more or 52121 kg
      Generator current strength 75 amperes and 55 amperes 27 % more or 20 amperes
      Fuel Capacity 1425 l. and 341 l. 76 % more or 1084 l.
      Hydraulic system fluid volume 725 l. and 117 l. 84 % more or 608 l.
      Engine oil volume 132 l. and 25 l. 81 % more or 107 l.
      Cooling system fluid volume 319 l. and 29 l. 91 % more or 290 l.

      Motor

      Effective power 636.1 kW and 134 kW 79 % more or 502.1 kW
      Full power 668.9 kW and 158 kW 76 % more or 510.9 kW
      Displacement 30.5 l. and 8.1 l. 73 % more or 22.4 l.
      Cylinders number 12 and 6 50 % more or 6

      Hydraulic system

      Pump bandwidth 405 l/min and 280 l/min 31 % more or 125 l/min

      Gear box

      Maximum reverse gear 28.3 km/h and 26.7 km/h 6 % more or 1.6 km/h

      Neutral reasons:

      Sizes

      Wheelbase 3200 mm and 5450 mm
      Hinge axis maximum height 4156 mm and 6960 mm
      Length with bucket on ground level 7815 mm and 14430 mm
      Between tyres width 2874 mm and 4585 mm
      Height to cab upper part 3412 mm and 5275 mm

      Shovel

      Shovel width 3040 mm and 4815 mm

      Operation

      Operating voltage 24 V and 24 V
      Rear axle oscillating 26 degrees and 22 degrees
      Tyre size 23.5-25 and 45/64-45
      Working weight 17657 kg and 102880 kg

      Motor

      Model 6081H and SAA12V140ZE-2
      Manufacturer John Deere and Komatsu
      Aspiration Turbocharging with subsequent air cooling (by a cooling radiator) and Turbocharging with subsequent air cooling (by a cooling radiator)

      Hydraulic system

      Type of pump piston pump and variable displacement piston pump
      Overflow valve pressure 24850 kPa and 34315.2 kPa

      Gear box

      Transmission type powershift and powershift transmission
      Reverse gears number 3 and 3

      Images

      Sizes

      2. Between tyres width 2874 mm 2. Between tyres width 4585 mm
      3. Height to cab upper part 3412 mm 3. Height to cab upper part 5275 mm
      4. Wheelbase 3200 mm 4. Wheelbase 5450 mm
      5. Clearance 473 mm 5. Clearance 550 mm
      6. Hinge axis maximum height 4156 mm 6. Hinge axis maximum height 6960 mm
      8. Radius at maximum lifting and unloading 1055 mm 8. Radius at maximum lifting and unloading 2450 mm
      1. Length with bucket on ground level 7815 mm 1. Length with bucket on ground level 14430 mm

      Shovel

      7. Unloading ground clearance at maximum lifting 2962 mm 7. Unloading ground clearance at maximum lifting 4715 mm