vs.

      John Deere 644H MH vs. John Deere 644K Z-Bar

      15 reasons to buy John Deere 644H MH:

      Sizes

      Clearance 473 mm and 408 mm 14 % more or 65 mm

      Shovel

      Unloading ground clearance at maximum lifting 2962 mm and 2860 mm 3 % more or 102 mm
      Bucket capacity with top 3.4 m3 and 3.2 m3 6 % more or 0.2 m3
      Brimmed bucket capacity 2.9 m3 and 2.8 m3 3 % more or 0.1 m3

      Operation

      Rear axle / differential fluid volume 27 l. and 22 l. 19 % more or 5 l.
      Turn radius 5500 mm and 5570 mm 1 % less or 70 mm
      Hydraulic system fluid volume 117 l. and 110 l. 6 % more or 7 l.
      Engine oil volume 25 l. and 24.5 l. 2 % more or 0.5 l.
      Transmission fluid volume 26 l. and 23 l. 12 % more or 3 l.
      Front axle / differential fluid volume 27 l. and 22 l. 19 % more or 5 l.

      Motor

      Power measured at 2200 rev / min and 1700 rev / min 23 % more or 500 rev
      Displacement 8.1 l. and 6.8 l. 16 % more or 1.3 l.

      Hydraulic system

      Unloading time 1.2 sec and 1.4 sec 14 % less or 0.2 sec

      Gear box

      Maximum forward speed 39 km/h and 36.6 km/h 6 % more or 2.4 km/h
      Maximum reverse gear 26.7 km/h and 24.9 km/h 7 % more or 1.8 km/h

      12 reasons to buy John Deere 644K Z-Bar:

      Sizes

      Radius at maximum lifting and unloading 1120 mm and 1055 mm 6 % more or 65 mm

      Shovel

      Breakout power 150.8 kN and 152.8 kN 1 % less or 2.0 kN

      Operation

      Static tipping weight 15230 kg and 14019 kg 8 % more or 1211 kg
      Fuel Capacity 352 l. and 341 l. 3 % more or 11 l.
      Generator current strength 80 amperes and 55 amperes 31 % more or 25 amperes
      Cooling system fluid volume 29.5 l. and 29 l. 2 % more or 0.5 l.

      Motor

      Maximum torque 1016 Nm and 1010.1 Nm 1 % more or 5.9 Nm
      Effective power 173 kW and 134 kW 23 % more or 39 kW
      Torque increase 55 % and 40 % 27 % more or 15 %
      Torque measured at 1400 rev / min and 1300 rev / min 7 % more or 100 rev

      Hydraulic system

      Pump bandwidth 310 l/min and 280 l/min 10 % more or 30 l/min
      Lifting time 5.5 sec and 6 sec 8 % less or 0.5 sec

      Neutral reasons:

      Sizes

      Between tyres width 2874 mm and 2875 mm
      Height to cab upper part 3412 mm and 3380 mm
      Wheelbase 3200 mm and 3260 mm
      Hinge axis maximum height 4156 mm and 4070 mm
      Length with bucket on ground level 7815 mm and 8140 mm

      Shovel

      Shovel width 3040 mm and 3040 mm

      Operation

      Tyre size 23.5-25 and 23.5 R25
      Working weight 17657 kg and 18160 kg
      Operating voltage 24 V and 24 V
      Rear axle oscillating 26 degrees and 26 degrees

      Motor

      Aspiration Turbocharging with subsequent air cooling (by a cooling radiator) and Turbocharger with charge air cooler by oncoming air flow
      Cylinders number 6 and 6
      Manufacturer John Deere and John Deere
      Model 6081H and 6068H, III Level III certified

      Hydraulic system

      Lowering time 3 sec and 3 sec
      Type of pump piston pump and variable displacement axial piston pump
      Overflow valve pressure 24850 kPa and 25165.8 kPa

      Gear box

      Transmission type powershift and Powershift transmission of intermediate type
      Forward gears number 4 and 4
      Reverse gears number 3 and 3

      Images

      Sizes

      1. Length with bucket on ground level 7815 mm 1. Length with bucket on ground level 8140 mm
      2. Between tyres width 2874 mm 2. Between tyres width 2875 mm
      3. Height to cab upper part 3412 mm 3. Height to cab upper part 3380 mm
      4. Wheelbase 3200 mm 4. Wheelbase 3260 mm
      5. Clearance 473 mm 5. Clearance 408 mm
      6. Hinge axis maximum height 4156 mm 6. Hinge axis maximum height 4070 mm
      8. Radius at maximum lifting and unloading 1055 mm 8. Radius at maximum lifting and unloading 1120 mm

      Shovel

      7. Unloading ground clearance at maximum lifting 2962 mm 7. Unloading ground clearance at maximum lifting 2860 mm