vs.

      John Deere 644J High-Lift vs. John Deere 824K Z-Bar

      5 reasons to buy John Deere 644J High-Lift:

      Shovel

      Breakout power 136 kN and 185.4 kN 27 % less or 49.4 kN
      Unloading ground clearance at maximum lifting 3380 mm and 3190 mm 6 % more or 190 mm

      Operation

      Turn radius 5.5 mm and 5920 mm 100 % less or 5914.5 mm

      Motor

      Power measured at 2200 rev / min and 1600 rev / min 27 % more or 600 rev
      Torque measured at 1400 rev / min and 900 rev / min 36 % more or 500 rev

      19 reasons to buy John Deere 824K Z-Bar:

      Sizes

      Radius at maximum lifting and unloading 1280 mm and 1170 mm 9 % more or 110 mm

      Shovel

      Bucket capacity with top 4.6 m3 and 3 m3 35 % more or 1.6 m3

      Operation

      Fuel Capacity 469.4 l. and 352 l. 25 % more or 117.4 l.
      Hydraulic system fluid volume 159 l. and 117 l. 26 % more or 42 l.
      Engine oil volume 37.9 l. and 24.5 l. 35 % more or 13.4 l.
      Cooling system fluid volume 47.4 l. and 29.5 l. 38 % more or 17.9 l.
      Transmission fluid volume 27.9 l. and 26.5 l. 5 % more or 1.4 l.
      Front axle / differential fluid volume 45.9 l. and 22 l. 52 % more or 23.9 l.
      Rear axle / differential fluid volume 45.9 l. and 22 l. 52 % more or 23.9 l.
      Static tipping weight 20508 kg and 12560 kg 39 % more or 7948 kg

      Motor

      Effective power 248.3 kW and 138 kW 44 % more or 110.3 kW
      Displacement 13.5 l. and 6.8 l. 50 % more or 6.7 l.
      Maximum torque 1618.8 Nm and 1016 Nm 37 % more or 602.8 Nm
      Torque increase 59 % and 55 % 7 % more or 4 %

      Hydraulic system

      Pump bandwidth 513 l/min and 257 l/min 50 % more or 256 l/min
      Unloading time 1.3 sec and 1.9 sec 32 % less or 0.6 sec
      Lowering time 2.5 sec and 2.8 sec 11 % less or 0.3 sec

      Gear box

      Maximum forward speed 40 km/h and 35.4 km/h 11 % more or 4.6 km/h
      Maximum reverse gear 30.1 km/h and 25 km/h 17 % more or 5.1 km/h

      Neutral reasons:

      Sizes

      Wheelbase 3200 mm and 3460 mm
      Hinge axis maximum height 4570 mm and 4480 mm
      Length with bucket on ground level 8530 mm and 9260 mm
      Height to cab upper part 3400 mm and 3500 mm
      Clearance 460 mm and 460 mm

      Shovel

      Shovel width 2971.8 mm and 3270 mm

      Operation

      Working weight 18425 kg and 26210 kg
      Operating voltage 24 V and 24 V
      Generator current strength 80 amperes and 80 amperes
      Rear axle oscillating 24 degrees and 26 degrees
      Tyre size 23.5 R25 and 26.5 R 25

      Motor

      Manufacturer John Deere and John Deere
      Model 6068H and 6135H, III Level III certified
      Cylinders number 6 and 6
      Aspiration Turbocharger with charge air cooler by oncoming air flow and Turbocharger with charge air cooler by oncoming air flow

      Hydraulic system

      Type of pump variable displacement axial piston pump and two variable displacement piston pumps, axial, with load sensing
      Overflow valve pressure 24800 kPa and 25165.8 kPa
      Lifting time 5.9 sec and 5.9 sec

      Gear box

      Reverse gears number 3 and 3
      Transmission type automatic transmission system with power gear shifting and Powershift transmission of intermediate type
      Forward gears number 4 and 4

      Images

      Sizes

      1. Length with bucket on ground level 8530 mm 1. Length with bucket on ground level 9260 mm
      3. Height to cab upper part 3400 mm 3. Height to cab upper part 3500 mm
      4. Wheelbase 3200 mm 4. Wheelbase 3460 mm
      5. Clearance 460 mm 5. Clearance 460 mm
      6. Hinge axis maximum height 4570 mm 6. Hinge axis maximum height 4480 mm
      8. Radius at maximum lifting and unloading 1170 mm 8. Radius at maximum lifting and unloading 1280 mm

      Shovel

      7. Unloading ground clearance at maximum lifting 3380 mm 7. Unloading ground clearance at maximum lifting 3190 mm