JLG 340 Boom lifts tech specs
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The JLG 340 AJ is a compact, engine-powered articulating boom made for tight jobsites. It delivers 12.33 m working height with 10.31 m platform height, 6.06 m horizontal reach, and a full 227 kg capacity in a short, light package that still climbs 45 % grades. Steel hoods, simple service points, and proportional controls keep it working, not waiting.
Small footprint with zero-tailswing, 1.93 m width, 5.52 m length, about 2.0 m height, easy to position indoors or in courtyards.
Strong up-and-over: 5.17 m clearance with a 1.22 m jib for reaching over canopies and pipe racks.
Real off-slab capability: 4WD, 45 % gradeability, inside turn radius ~1.52 m, outside ~3.96 m.
Lower upkeep mindset: steel hoods, JLG analyzer ports at base and platform, Tier 4 diesel or dual-fuel options.
JLG 340 Technical specifications
Dimensions
Axle Oscillation
0.15 m
Ground clearance
25.4 cm
Overall Length
5.55 m
Overall Width
1.95 m
Stowed height
2.04 m
Turning radius
1.52 m
General
Engine model
Kubota D1105 24.8
Gradeability
45 º
Max horizontal reach
5180 mm
Operating weight
4,399 kg
Operating voltage
12 V
Tire size
265/50020 Lug Tread
Service refill capacities
Fuel cap
49.21 liter
Hydraulic fluid cap
77.97 liter
Engine
Gross power
21.4 kw
Undercarriage
Ground pressure
10.41 bar
Performance
Drive Speed - Platform Lowered
5.15 kph
Platform Capacity - Unrestricted
226.8 kg
Platform
Platform Dimension A
0.79 m
Platform Dimension B
1.52 m
Operating specifications
Platform railing height
109 cm
Swing
355 º
Swing type
Non-Continuous
JLG 340 expert review
Overview
Where a 45 ft class boom is too much, 340 AJ threads through scaffolds and courtyards, then reaches over parapets and racks. Zero tailswing reduces setup moves and keeps you productive.
Steel hoods and simple service layout for fast maintenance.
~4,400 kg still requires transport planning and slab checks.
Performance & Efficiency
4WD axle drive with 45% gradeability handles ramps and compacted fill. Tight turning radii help near columns and scaffolds. The 1.22 m jib and 5.17 m up-and-over clear canopies and mezzanines. Proportional controls and selectable creep speed ease precise basket placement. Analyzer ports and steel hoods support quick diagnostics and daily checks.
In Comparison
Versus JLG 450 AJ: more height and reach but larger and heavier; pick 340 AJ when space and transport weight are tight.
Versus Skyjack SJ46 AJ: SJ46 AJ offers ~14.10 m platform height and ~7.54 m reach; 340 AJ stays lighter and smaller for constrained access.
Verdict
JLG 340 AJ balances reach, weight, and serviceability for real-world access work, especially where a full 45 ft boom will not fit.
JLG 340 owner rating
2011-2020
Overall rating
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