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- John Deere 644J High-Lift vs. Hyundai HL780-3A
John Deere 644J High-Lift vs. Hyundai HL780-3A
8 reasons to buy John Deere 644J High-Lift:
Shovel
Unloading ground clearance at maximum lifting | 3380 mm and 3347 mm | 1 % more or 33 mm |
Breakout power | 136 kN and 243.4 kN | 44 % less or 107.4 kN |
Operation
Generator current strength | 80 amperes and 70 amperes | 12 % more or 10 amperes |
Motor
Power measured at | 2200 rev / min and 2100 rev / min | 5 % more or 100 rev |
Hydraulic system
Lifting time | 5.9 sec and 6.4 sec | 8 % less or 0.5 sec |
Lowering time | 2.8 sec and 3.5 sec | 20 % less or 0.7 sec |
Gear box
Maximum forward speed | 35.4 km/h and 34.7 km/h | 2 % more or 0.7 km/h |
Maximum reverse gear | 25 km/h and 23.3 km/h | 7 % more or 1.7 km/h |
16 reasons to buy Hyundai HL780-3A:
Sizes
Radius at maximum lifting and unloading | 1440 mm and 1170 mm | 19 % more or 270 mm |
Clearance | 475 mm and 460 mm | 3 % more or 15 mm |
Shovel
Bucket capacity with top | 5.1 m3 and 3 m3 | 41 % more or 2.1 m3 |
Operation
Fuel Capacity | 470 l. and 352 l. | 25 % more or 118 l. |
Hydraulic system fluid volume | 235 l. and 117 l. | 50 % more or 118 l. |
Engine oil volume | 38 l. and 24.5 l. | 36 % more or 13.5 l. |
Cooling system fluid volume | 65 l. and 29.5 l. | 55 % more or 35.5 l. |
Transmission fluid volume | 43 l. and 26.5 l. | 38 % more or 16.5 l. |
Front axle / differential fluid volume | 60 l. and 22 l. | 63 % more or 38 l. |
Rear axle / differential fluid volume | 60 l. and 22 l. | 63 % more or 38 l. |
Static tipping weight | 22200 kg and 12560 kg | 43 % more or 9640 kg |
Motor
Displacement | 11 l. and 6.8 l. | 38 % more or 4.2 l. |
Maximum torque | 1704.3 Nm and 1016 Nm | 40 % more or 688.3 Nm |
Effective power | 238.6 kW and 138 kW | 42 % more or 100.6 kW |
Hydraulic system
Pump bandwidth | 473 l/min and 257 l/min | 46 % more or 216 l/min |
Unloading time | 1.3 sec and 1.9 sec | 32 % less or 0.6 sec |
Neutral reasons:
Sizes
Length with bucket on ground level | 8530 mm and 9390 mm |
Height to cab upper part | 3400 mm and 3670 mm |
Wheelbase | 3200 mm and 3700 mm |
Hinge axis maximum height | 4570 mm and 4560 mm |
Shovel
Shovel width | 2971.8 mm and 3450 mm |
Operation
Operating voltage | 24 V and 24 V |
Rear axle oscillating | 24 degrees and 26 degrees |
Tyre size | 23.5 R25 and 29.5-25 22PR L3 |
Working weight | 18425 kg and 29300 kg |
Motor
Torque measured at | 1400 rev / min and 1400 rev / min |
Cylinders number | 6 and 6 |
Aspiration | Turbocharger with charge air cooler by oncoming air flow and turbocharging |
Manufacturer | John Deere and Cummins |
Model | 6068H and QSM11 |
Hydraulic system
Type of pump | variable displacement axial piston pump and open-centered, doubling loop system |
Overflow valve pressure | 24800 kPa and 20615.3 kPa |
Gear box
Transmission type | automatic transmission system with power gear shifting and fully automatic powershift |
Forward gears number | 4 and 4 |
Reverse gears number | 3 and 3 |
Images
Sizes
6. Hinge axis maximum height | 4570 mm | 6. Hinge axis maximum height | 4560 mm |
8. Radius at maximum lifting and unloading | 1170 mm | 8. Radius at maximum lifting and unloading | 1440 mm |
1. Length with bucket on ground level | 8530 mm | 1. Length with bucket on ground level | 9390 mm |
3. Height to cab upper part | 3400 mm | 3. Height to cab upper part | 3670 mm |
4. Wheelbase | 3200 mm | 4. Wheelbase | 3700 mm |
5. Clearance | 460 mm | 5. Clearance | 475 mm |
Shovel
7. Unloading ground clearance at maximum lifting | 3380 mm | 7. Unloading ground clearance at maximum lifting | 3347 mm |