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- Case 721EXT vs. John Deere 644A
Case 721EXT vs. John Deere 644A
16 reasons to buy Case 721EXT:
Sizes
Radius at maximum lifting and unloading | 1215 mm and 889 mm | 27 % more or 326 mm |
Shovel
Breakout power | 128 kN and 184.7 kN | 31 % less or 56.7 kN |
Unloading ground clearance at maximum lifting | 2847 mm and 2819.4 mm | 1 % more or 27.6 mm |
Bucket capacity with top | 2.3 m3 and 1.9 m3 | 17 % more or 0.4 m3 |
Operation
Front axle / differential fluid volume | 30.3 l. and 22.7 l. | 25 % more or 7.6 l. |
Rear axle / differential fluid volume | 27.4 l. and 24.6 l. | 10 % more or 2.8 l. |
Static tipping weight | 11695 kg and 8439 kg | 28 % more or 3256 kg |
Generator current strength | 65 amperes and 55 amperes | 15 % more or 10 amperes |
Fuel Capacity | 246 l. and 189.3 l. | 23 % more or 56.7 l. |
Hydraulic system fluid volume | 193.1 l. and 66.2 l. | 66 % more or 126.9 l. |
Cooling system fluid volume | 36.9 l. and 34.1 l. | 8 % more or 2.8 l. |
Motor
Displacement | 6.7 l. and 6.6 l. | 1 % more or 0.1 l. |
Maximum torque | 809 Nm and 467.8 Nm | 42 % more or 341.2 Nm |
Gear box
Reverse gears number | 3 and 2 | 33 % more or 1 |
Maximum forward speed | 38 km/h and 37 km/h | 3 % more or 1 km/h |
Maximum reverse gear | 25.7 km/h and 15.3 km/h | 40 % more or 10.4 km/h |
9 reasons to buy John Deere 644A:
Sizes
Clearance | 437 mm and 365 mm | 16 % more or 72 mm |
Operation
Turn radius | 4700 mm and 5750 mm | 18 % less or 1050 mm |
Engine oil volume | 16.1 l. and 14.2 l. | 12 % more or 1.9 l. |
Transmission fluid volume | 36.9 l. and 25.6 l. | 31 % more or 11.3 l. |
Motor
Effective power | 133 kW and 128 kW | 4 % more or 5 kW |
Full power | 143 kW and 136 kW | 5 % more or 7 kW |
Power measured at | 2400 rev / min and 1800 rev / min | 25 % more or 600 rev |
Torque measured at | 1600 rev / min and 1300 rev / min | 19 % more or 300 rev |
Hydraulic system
Pump bandwidth | 227 l/min and 119.6 l/min | 47 % more or 107.4 l/min |
Neutral reasons:
Sizes
Hinge axis maximum height | 3975 mm and 3610 mm |
Length with bucket on ground level | 7773 mm and 6300.2 mm |
Height to cab upper part | 3404 mm and 3099.8 mm |
Wheelbase | 3253 mm and 2640 mm |
Shovel
Shovel width | 2700 mm and 2650 mm |
Operation
Operating voltage | 24 V and 12 V |
Rear axle oscillating | 24 degrees and 22 degrees |
Tyre size | 20.5 R25 and 16-24 / 20.5- 25 |
Working weight | 14436.5 kg and 11440 kg |
Motor
Manufacturer | Case and John Deere |
Aspiration | Turbocharging with subsequent air cooling (by a cooling radiator) and turbocharging |
Hydraulic system
Type of pump | in the middle position with locking with pressure / flow compensation and variable displacement piston pump |
Overflow valve pressure | 24821 kPa and 15513.2 kPa |
Gear box
Transmission type | 4F / 3R (4 forward / 3 reverse speeds) proportional with electronic control module, with torque measurement, automatic / manual shifting and modulating and powershift transmission |
Forward gears number | 4 and 4 |
Images
Sizes
3. Height to cab upper part | 3404 mm | 3. Height to cab upper part | 3099.8 mm |
4. Wheelbase | 3253 mm | 4. Wheelbase | 2640 mm |
5. Clearance | 365 mm | 5. Clearance | 437 mm |
6. Hinge axis maximum height | 3975 mm | 6. Hinge axis maximum height | 3610 mm |
8. Radius at maximum lifting and unloading | 1215 mm | 8. Radius at maximum lifting and unloading | 889 mm |
1. Length with bucket on ground level | 7773 mm | 1. Length with bucket on ground level | 6300.2 mm |
Shovel
7. Unloading ground clearance at maximum lifting | 2847 mm | 7. Unloading ground clearance at maximum lifting | 2819.4 mm |