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- John Deere 644H High-Lift vs. Case 921C
John Deere 644H High-Lift vs. Case 921C
10 reasons to buy John Deere 644H High-Lift:
Sizes
Clearance | 461 mm and 445 mm | 3 % more or 16 mm |
Radius at maximum lifting and unloading | 1175 mm and 1100 mm | 6 % more or 75 mm |
Shovel
Breakout power | 30574 pound and 50275 pound | 39 % less or 19701 pound |
Unloading ground clearance at maximum lifting | 3375 mm and 3150 mm | 7 % more or 225 mm |
Operation
Turn radius | 5500 mm and 6140 mm | 10 % less or 640 mm |
Motor
Power measured at | 2200 rev / min and 2100 rev / min | 5 % more or 100 rev |
Hydraulic system
Unloading time | 1.4 sec and 1.5 sec | 7 % less or 0.1 sec |
Lowering time | 3 sec and 4.9 sec | 39 % less or 1.9 sec |
Pump bandwidth | 257.4 l/min and 143.8 l/min | 44 % more or 113.6 l/min |
Gear box
Maximum forward speed | 39 km/h and 38.8 km/h | 1 % more or 0.2 km/h |
15 reasons to buy Case 921C:
Shovel
Bucket capacity with top | 3.6 m3 and 3.3 m3 | 8 % more or 0.3 m3 |
Brimmed bucket capacity | 2.9 m3 and 2.8 m3 | 3 % more or 0.1 m3 |
Operation
Front axle / differential fluid volume | 63.6 l. and 27 l. | 58 % more or 36.6 l. |
Rear axle / differential fluid volume | 63.6 l. and 27 l. | 58 % more or 36.6 l. |
Static tipping weight | 19643 kg and 11248 kg | 43 % more or 8395 kg |
Fuel Capacity | 393.7 l. and 341 l. | 13 % more or 52.7 l. |
Generator current strength | 70 amperes and 55 amperes | 21 % more or 15 amperes |
Hydraulic system fluid volume | 232.8 l. and 117 l. | 50 % more or 115.8 l. |
Engine oil volume | 36.9 l. and 25 l. | 32 % more or 11.9 l. |
Cooling system fluid volume | 47.3 l. and 29 l. | 39 % more or 18.3 l. |
Transmission fluid volume | 28.4 l. and 26 l. | 8 % more or 2.4 l. |
Motor
Maximum torque | 1255.5 Nm and 1010 Nm | 20 % more or 245.5 Nm |
Effective power | 184.9 kW and 134.2 kW | 27 % more or 50.7 kW |
Full power | 201.3 kW and 153 kW | 24 % more or 48.3 kW |
Displacement | 10.8 l. and 8.1 l. | 25 % more or 2.7 l. |
Neutral reasons:
Sizes
Length with bucket on ground level | 8525 mm and 8550 mm |
Between tyres width | 2697 mm and 2940 mm |
Height to cab upper part | 3400 mm and 3570 mm |
Wheelbase | 3200 mm and 3400 mm |
Hinge axis maximum height | 4569 mm and 4280 mm |
Shovel
Shovel width | 2900 mm and 3050 mm |
Operation
Rear axle oscillating | 26 degrees and 24 degrees |
Tyre size | 20.5-25 and 26.5x25 L3 |
Working weight | 17690 kg and 22961.3 kg |
Operating voltage | 24 V and 24 V |
Motor
Manufacturer | John Deere and Cummins |
Cylinders number | 6 and 6 |
Model | 6081H and QSMII |
Aspiration | Turbocharging with subsequent air cooling (by a cooling radiator) and Turbocharger with air cooling by oncoming air flow |
Torque measured at | 1300 rev / min and 1300 rev / min |
Hydraulic system
Lifting time | 6.2 sec and 6.2 sec |
Type of pump | piston pump and pumps with twin vanes |
Overflow valve pressure | 24821.1 kPa and 19650 kPa |
Gear box
Transmission type | powershift and 4F / 3R (4 forward / 3 reverse speeds) proportional with electronic control module, with torque measurement, automatic / manual shifting and modulating |
Forward gears number | 4 and 4 |
Reverse gears number | 3 and 3 |
Maximum reverse gear | 26.7 km/h and 26.7 km/h |
Images
Sizes
4. Wheelbase | 3200 mm | 4. Wheelbase | 3400 mm |
5. Clearance | 461 mm | 5. Clearance | 445 mm |
6. Hinge axis maximum height | 4569 mm | 6. Hinge axis maximum height | 4280 mm |
8. Radius at maximum lifting and unloading | 1175 mm | 8. Radius at maximum lifting and unloading | 1100 mm |
1. Length with bucket on ground level | 8525 mm | 1. Length with bucket on ground level | 8550 mm |
2. Between tyres width | 2697 mm | 2. Between tyres width | 2940 mm |
3. Height to cab upper part | 3400 mm | 3. Height to cab upper part | 3570 mm |
Shovel
7. Unloading ground clearance at maximum lifting | 3375 mm | 7. Unloading ground clearance at maximum lifting | 3150 mm |