Dimensions
| Overall Length | 243 in (6170 mm) |
| Wheelbase | 127 in (3230 mm) |
| Overall Width | 97 in (2460 mm) |
| Overall Height | 105 (2670 mm) |
| Ground Clearance | 19 in (483 mm) |
| Outside Turning Radius | 158 in (4010 mm) |
Lift
| Max Lift Height | 43 ft 7 in (13280 mm) |
| Max Forward Reach | 31 ft 1 in (9470 mm) |
| Max Lift Capacity | 15650 lb (7100 kg) |
| Max Load At Max Height | 6750 lb (3062 kg) |
| Max Load At Max Reach | 2000 lb (907 kg) |
| Frame Leveling | 8 degrees |
Engine Details
| Engine Make | Deutz |
| Engine Model | Deutz TCD 3.6L |
| Gross Power | 134 hp (100 kw) |
| Power Measured @ | 2200 rpm |
| Emission Standards | Tier 4 Final |
Operational Specs
| Operating Weight | 33660 lb (15265 kg) |
| Fuel Tank Capacity | 39 gal (148 L) |
| Drawbar Pull | 23000 lb (102 kN) |
| Tire Size | 17.5-25 SGG |
Transmission
| Transmission Type | Hydrostatic |
| Maximum Travel | 20 mph (32.2 km/h) |
| Brakes Type | Wet Multi-Disc |
| Front Axle | High Bias, Limited Slip |
| Rear Axle | Oscillating |
Hydraulic
| Pump Type | Load Sensing Piston |
| Hydraulic System Capacity | 67 gal (255 L) |
| Maximum Lift | 18.3 sec |
| Maximum Lower | 13.6 sec |
| Maximum Telescope In | 12.3 sec |
| Maximum Telescope Out | 15.8 sec |
JLG 1644 Attachments
| Standard Carriage | 60 in (1.5 m) |
| Carriage | 72 in (1.8 m) |
| Carriage | 87 in (2.2 m) |
| Dual Fork Positioning Carriage | 72 in (1.8 m) |
| Side-Shift Carriage with Dual Fork Positioning | 72 in (1.8 m) |
| General Purpose Bucket | 94 in / 2.6 yd3 (2.38 m / 1.98 m3) |
| Light Material Bucket | 94 in / 5.2 yd3 (2.38 m / 3.97 m3) |
| Multipurpose 4-in-1 Bucket | 94 in., 1.3 yd3 (2.38 m / 0.99 m3) |
| Grapple Bucket | 94 in., 1.7 yd3 (2.38 m / 1.29 m3) |
| Material Handling Arm | 16750 lb Capacity (7598 kg) |
| Hook, Coupler-mounted | 16750 lb Capacity (7598 kg) |
| Winch, Coupler-mounted | 8000 lb Capacity (3629 kg) |
| Bale Cradle, Round Bale | 7000 lb Capacity (3175 kg) |
| Bale Clamp, Square Bale | 10000 lb Capacity (4536 kg) |
| Pipe Grapple | 96 in / 8000 lb Capacity (2.4 m / 3629 kg) |
| Log Handler | 80 in / 8000 lb Capacity (2.03 m / 3629 kg) |
| Steel Coil Handler | 16750 lb Capacity (7598 kg) |
| Lifting Hook, Fork-mounted | 15000 lb Capacity (6804 kg) |
| Extendable Truss, Fork-mounted | 8000 lb Capacity (3629 kg) |
