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      John Deere 644J Z-Bar vs. John Deere 344J

      24 reasons to buy John Deere 644J Z-Bar:

      Sizes

      Clearance 434 mm and 385 mm 11 % more or 49 mm
      Radius at maximum lifting and unloading 1120 mm and 830 mm 26 % more or 290 mm

      Shovel

      Bucket capacity with top 3.2 m3 and 1.5 m3 53 % more or 1.7 m3
      Brimmed bucket capacity 2.8 m3 and 1.2 m3 57 % more or 1.6 m3
      Unloading ground clearance at maximum lifting 2950 mm and 2850 mm 3 % more or 100 mm

      Operation

      Generator current strength 80 amperes and 65 amperes 19 % more or 15 amperes
      Fuel Capacity 352 l. and 159 l. 55 % more or 193 l.
      Hydraulic system fluid volume 117 l. and 98 l. 16 % more or 19 l.
      Engine oil volume 24.5 l. and 13 l. 47 % more or 11.5 l.
      Cooling system fluid volume 29.5 l. and 26.5 l. 10 % more or 3.0 l.
      Front axle / differential fluid volume 22 l. and 9.3 l. 58 % more or 12.7 l.
      Rear axle / differential fluid volume 22 l. and 8.7 l. 60 % more or 13.3 l.
      Static tipping weight 15594 kg and 6200 kg 60 % more or 9394 kg

      Motor

      Displacement 6.8 l. and 4.5 l. 34 % more or 2.3 l.
      Cylinders number 6 and 4 33 % more or 2
      Maximum torque 1016 Nm and 395 Nm 61 % more or 621 Nm
      Torque increase 55 % and 36 % 35 % more or 19 %
      Effective power 138 kW and 73 kW 47 % more or 65 kW

      Hydraulic system

      Pump bandwidth 257 l/min and 114 l/min 56 % more or 143 l/min
      Unloading time 1.4 sec and 1.5 sec 7 % less or 0.1 sec
      Lowering time 3 sec and 4 sec 25 % less or 1 sec

      Gear box

      Forward gears number 4 and 2 50 % more or 2
      Reverse gears number 3 and 2 33 % more or 1
      Maximum forward speed 35.4 km/h and 29.9 km/h 16 % more or 5.5 km/h

      5 reasons to buy John Deere 344J:

      Shovel

      Breakout power 77 kN and 153 kN 50 % less or 76 kN

      Operation

      Turn radius 4205 mm and 5490 mm 23 % less or 1285 mm

      Motor

      Power measured at 2400 rev / min and 2200 rev / min 8 % more or 200 rev

      Hydraulic system

      Lifting time 4.4 sec and 6.2 sec 29 % less or 1.8 sec

      Gear box

      Maximum reverse gear 29.9 km/h and 25 km/h 16 % more or 4.9 km/h

      Neutral reasons:

      Sizes

      Length with bucket on ground level 8050 mm and 6130 mm
      Between tyres width 2875 mm and 1150 mm
      Height to cab upper part 3400 mm and 3023 mm
      Wheelbase 3200 mm and 2600 mm
      Hinge axis maximum height 4140 mm and 3660 mm

      Shovel

      Shovel width 2895.6 mm and 2400 mm

      Operation

      Rear axle oscillating 26 degrees and 20 degrees
      Tyre size 23.5 R25 and 17.5R25
      Operating voltage 24 V and 12 V
      Working weight 18212 kg and 8350 kg

      Motor

      Torque measured at 1400 rev / min and 1400 rev / min
      Manufacturer John Deere and John Deere
      Model 6068H and 4045T

      Hydraulic system

      Type of pump variable displacement axial piston pump and gear type pump
      Overflow valve pressure 24800 kPa and 22980 kPa

      Gear box

      Transmission type automatic powershift and Hydraulic

      Images

      Sizes

      1. Length with bucket on ground level 8050 mm 1. Length with bucket on ground level 6130 mm
      2. Between tyres width 2875 mm 2. Between tyres width 1150 mm
      3. Height to cab upper part 3400 mm 3. Height to cab upper part 3023 mm
      4. Wheelbase 3200 mm 4. Wheelbase 2600 mm
      5. Clearance 434 mm 5. Clearance 385 mm
      6. Hinge axis maximum height 4140 mm 6. Hinge axis maximum height 3660 mm
      8. Radius at maximum lifting and unloading 1120 mm 8. Radius at maximum lifting and unloading 830 mm

      Shovel

      7. Unloading ground clearance at maximum lifting 2950 mm 7. Unloading ground clearance at maximum lifting 2850 mm