Dimensions
| A. Platform Width | 30 in (762 mm) |
| B. Platform Length | 48 in (1220 mm) |
| B. Platform Length | 60 in (1524 mm) |
| C. Machine Width | 76 in (1930 mm) |
| D. Tailswing | 2 in (51 mm) |
| E. Machine Height (stowed) | 79 in (2006 mm) |
| E. Machine Height (storage) | 85 in (2159 mm) |
| F. Machine Length | 218 in (5537 mm) |
| F. Machine Length with Jib Stowed | 158 in (4013 mm) |
| G. Wheelbase | 74 in (1880 mm) |
| H. Ground Clearance | 10 in (237 mm) |
Tires
| Standard Tire Size | 9×20 Foam Filled (265/50 D20) |
| Option 1 | 9×20 Filled Non-Marking |
| Option 2 | 33×12 Foam Filled Turf & Sand |
| Option 3 | 7×18 Solid |
| Option 4 | 7×18 Solid Non-Marking |
Platform
| Platform Height | 33.1 ft 10.5 in (10.3 m) |
| Horizontal Outreach | 19 ft 11 in (6.07 m) |
| Up and Over Height | 17 ft (5.17 m) |
| Platform Capacity | 500 lb (227 kg) |
| Platform Rotator (Hydraulic) | 180° |
| Swing | 355° |
| Swing Type | Non-Continuous |
| Jib | 4 ft (1.22 m) |
| Tilt Cut Out | 4° |
| Range of Articulation | 139° (+79°, -60°) |
Engine Details
| Fuel Type | Diesel | Dual Fuel |
|---|---|---|
| Number of Cylinders | 3 | 4 |
| Engine Model | Kubota D1105 | PSI/GM L4 EFI |
| Displacement | 68.5 cu in (1.123 L) | 59 cu in (0.967 L) |
| Bore | 3.07 in (78 mm) | 2.58 in (65.5 mm) |
| Stroke | 3.09 in (78.4 mm) | 2.84 in (72 mm) |
| Gross Power | 24.8 hp (18.5 kw) | 28.7 hp (21.4 kw) |
| Low Idle RPM | 1200 rpm | 1200 rpm |
| High Idle RPM | 3000 rpm | 3000 rpm |
| Aspiration | Naturally aspirated | Naturally aspirated |
| Emission Standards | US EPA Tier 4 | US EPA Tier 4 |
Operational Specs
| Max Operating Weight | 10175 lb (4615 kg) |
| Gross Machine Weight | 9700 lb (4400 kg) |
| Counterweight | 1875 lb (850. kg) |
| Platform & Console, 30×60 in | 242.5 lb (110 kg) |
| Platform & Console, 30×48 in | 216 lb (98 kg) |
| Operating Volatge | 12 V |
| Alternator | 40 amps (95 amps) |
| Battery | 12 V, CCA 1000, Group 31 |
Chassis
| Transmission Type | Hydrostatic transmission |
| Max Travel Speed, 4WD | 3.1 mph (4.98 km/h) |
| Gradeability, 4WD | 45% |
| Turning Radius Inside | 5 ft (1520 mm) |
| Turning Radius Outside | 13 ft (3960 mm) |
| Axle Oscillation | 6 in (152 mm) |
| Ground Bearing Pressure | 62 psi (427.5 kPa) |
Hydraulic System
| Type | Load Sensing System |
| Pump Type | Variable displacement pump |
| Max Main Relief Pressure | 4060 psi (28000 kPa) |
Service Refill Capacities
| Fuel Tank Capacity | 13 gal (49.21 L) |
| Propane Tank Capacity | 43.5 lb (19.7 kg) |
| Engine Oil Capacity, Kubota D1105 (w/ filter) | 1.3 gal (5.1 L) |
| Engine Oil Capacity, PSI/GM L4 EFI (w/ filter) | 0.8 gal (3.2 L) |
| Cooling System Capacity | 1.6 gal (5.9 L) |
| Hydraulic System Capacity (w/ tank) | 24.8 gal (93.9 L) |
| Hydraulic Tank Capacity | 20.6 gal (77.9 L) |
| Front Drive Hub Capacity (each) | 0.2 gal (0.75 L) |
| Rear Drive Hub Capacity (each) | 0.2 gal (0.75 L) |
The JLG 340AJ is a compact, fuel-efficient articulated boom lift built for productivity and reliability on demanding job sites. Its design combines rugged construction with operator-focused features, making it a versatile choice for both indoor and outdoor applications. Operators benefit from advanced systems such as the Load Sensing System, All Motion Alarm, and the SkyGuard SkyLine safety enhancement, all working together to promote a safer work environment. The boom lift is equipped with hydrostatic drive for dependable maneuverability, an oscillating axle for stability on uneven terrain, and lugs for lifting and tie-down to simplify transport.
Durability is built in with features like gull-wing steel turntable hoods, a swing-out engine tray, and a cast aluminum control box, while modern connectivity comes through ClearSky Smart Fleet with CS550 hardware. Convenience is further enhanced with a 12V-DC auxiliary power system, 110V-AC platform receptacle, USB-A and USB-C charging ports, and a rapid-replaceable platform with self-closing gate. With smart diagnostics, ease of service, and a suite of operator-friendly enhancements, the JLG 340AJ delivers reliable performance, reduced downtime, and the flexibility contractors expect from JLG’s aerial work platforms.
