John Deere 644 X-Tier Mid-Size Wheel Loader
Mid-Size Wheel Loaders
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(301) 874-5500
Features
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Bucket Capacity: 3.1-3.6 m3; (4.0-4.75 cu. yd.)
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Operating Weight: 18 856-18 892 kg (41,571-41,649 lb.)
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Engine Net Power: 172 kW (231 hp)
Specifications
CAPACITIES - Alternator Output, Amp: |
140 |
CAPACITIES - Axle - Front, ltr (gallons (US)): |
22 (5.75) |
CAPACITIES - Axle - Rear, ltr (gallons (US)): |
22 (5.7) |
CAPACITIES - Breakout - Bucket , kgf (lbf): |
15574 (34334) |
CAPACITIES - Fuel Tank, ltr (gallons (US)): |
350 (92.6) |
CAPACITIES - Heaped Capacity, m³ (yd³): |
3.2 (4.25) |
CAPACITIES - Hydraulic Tank, ltr (gallons (US)): |
103.4 (27.3) |
CAPACITIES - Largest bucket capacity, m³ (yd³): |
3.4 (4.5) |
CAPACITIES - Pump Flow - 1, lt/min (gallons (US) / min): |
265 (70) |
CAPACITIES - Pump Type: |
Piston |
CAPACITIES - Ride Control System: |
Optional |
CAPACITIES - Smallest bucket capacity, m³ (yd³): |
3.2 (4.25) |
CAPACITIES - System Pressure, bar (PSI): |
251.66 (3650) |
CAPACITIES - System Voltage, V: |
24 |
CAPACITIES - Transmission, ltr (gallons (US)): |
32 (8.5) |
DIMENSIONS - Ground clearance, mm (inches): |
386 (15.2) |
DIMENSIONS - Height - Over Cab, mm (ft/in): |
3450 (11 ft 4 in) |
DIMENSIONS - Height - Pivot Pin, mm (ft/in): |
4090 (13 ft 5 in) |
DIMENSIONS - Length - Including Bucket, mm (ft/in): |
8260 (27 ft 1 in) |
DIMENSIONS - Reach - At 2130mm 45° Dump, mm (ft/in): |
1610 (5 ft 3 in) |
DIMENSIONS - Turning Circle - Maximum, mm (ft/in): |
13000 (42 ft 9 in) |
DIMENSIONS - Wheelbase, mm (ft/in): |
3310 (10 ft 10 in) |
DIMENSIONS - Width Over tires - Std, mm (ft/in): |
2875 (9 ft 5 in) |
DRIVELINE - Displacement, ltr (Inches³): |
6.8 (415) |
DRIVELINE - Emission Rating: |
Tier 4 / Stage V |
DRIVELINE - Engine Manufacturer : |
John Deere |
DRIVELINE - Engine Model: |
PowerTech PSS 6068 |
DRIVELINE - Engine Output - Net, kW (hp): |
172 (231) |
DRIVELINE - Front Differential Type: |
Locking |
DRIVELINE - Parking Brake - Type: |
Wet Multi Disc |
DRIVELINE - Rated Speed, rpm: |
1500 |
DRIVELINE - Rear Differential Type: |
Open |
DRIVELINE - Service Brake - Actuation: |
Hydraulic |
DRIVELINE - Service Brake - Location: |
All Wheels |
DRIVELINE - Service Brake - Type: |
Wet Disc |
DRIVELINE - Tire size - Standard: |
23.5 R25 |
DRIVELINE - Torque Rise, %: |
36 |
DRIVELINE - Torque, Nm (lbf / ft): |
1095 (808) |
DRIVELINE - Transmission Type: |
Powershift w/Hybrid-Electric Drive |
WEIGHTS - Operating Weight, kg (lbs): |
18856 (41571) |
E-Drive Innovation
- Innovative E-Drive transmission system delivers premium performance and efficiency. System includes an engine-driven generator plus an inverter to control the electric motor that drives a simplified PowerShift™ transmission.
Ground-Level Service
- All daily service points including fuel are conveniently grouped on the left side of the machine at ground level, for easy access.
- Hinged doors enable wide-open access to the engine, cooling system, and other components.
EH Controls
- Seat-mounted hydraulic controls include two programmable multifunction buttons and intuitive electrohydraulic (EH) controls.
- With the capacity to control up to six functions on the single hydraulic joystick, cycle times and productivity when using hydraulic attachments are improved.
Buckets & Linkage
- A wide-ranging selection of enhanced production buckets with integrated spill guards, curved side cutters, and impressive rollback maximizes bucket-fill performance and material retention.
- Choose from hi-vis and JRB-style couplers to maximize fleet versatility and machine utilization.
Comfortable Cab
- Spacious cab boasts ample legroom and features ergonomically placed controls, foot pedals, and sealed-switch module.
- Running wide open at 1,600 rpm, the in-cab noise rating is just 70 dBA.
