JLG 400S Boom Lift: Specs, Price and Buying Guide
Last updated: October 2026
The JLG 400S is a 40 ft telescopic boom lift. It reaches a 40 ft platform height (about 46 ft working height) and 33 ft 3 in of horizontal outreach, and it carries 600 lb unrestricted or 1,000 lb in restricted mode. With four-wheel drive and 45% gradeability, it is a common choice for outdoor construction and maintenance work.
This guide covers the 400S’s specs and features, how it compares to similar lifts, OHR Rents mechanic ratings, what it costs new and used, and what to check before you buy one.
In this guide:
JLG 400S Specs
| Specification | JLG 400S |
|---|---|
| Platform height | 40 ft |
| Working height | About 46 ft |
| Horizontal outreach | 33 ft 3 in |
| Platform capacity | 600 lb unrestricted, 1,000 lb restricted |
| Standard platform | 36 x 96 in (36 x 72 in optional) |
| Platform rotation | 180 degrees, hydraulic |
| Turntable rotation | 360 degrees, continuous |
| Tailswing | 2 ft 10 in |
| Machine weight | About 13,400 to 13,650 lb (varies by year and options) |
| Overall width | 7 ft 7 in |
| Stowed height | 8 ft 1 in |
| Stowed length | 24 ft 10 in |
| Ground clearance | 12 in |
| Drive | Four-wheel hydrostatic drive with oscillating axle |
| Drive speed | 4.5 mph |
| Gradeability | 45% |
| Turning radius | 15 ft 11 in outside, 6 ft 7 in inside |
| Engine options | Deutz D2.9 diesel, 49 hp (Tier 4 Final), or GM Vortec 3000 dual fuel (gas/LP), 82 hp |
| Fuel tank | 22 gal |
| Hydraulic tank | 36 gal |
| Standard tires | 12 x 16.5 pneumatic (foam-filled options) |
Specs are from JLG spec sheets for the 400S. Engines, platform options and weights vary by model year, so always check the data plate and the operator’s manual of the machine you are buying.
JLG 400S Key Features
- Dual capacity rating: 600 lb across the full working envelope, or 1,000 lb in restricted mode for heavier loads of people, tools and materials.
- Four-wheel drive and oscillating axle: 45% gradeability for rough, uneven job sites.
- 360-degree continuous rotation and a 180-degree hydraulic platform rotator for easier positioning.
- Control ADE system: JLG’s control system with an interactive ground control display that simplifies setup and troubleshooting.
- DuraTough hood: a durable hood with a swing-out engine tray for easier service access.
- Platform power: a 110V AC outlet at the platform, plus optional SkyPower, SkyWelder, SkyGlazier and Nite Bright packages.
- Safety features: a tilt alarm, all-motion alarm and platform status lights, with SkyGuard available as an option.
How the JLG 400S Compares
Here is how the 400S compares with Genie’s 40 ft and 45 ft telescopic booms and JLG’s 46 ft model with a jib.
| Model | Platform height | Horizontal outreach | Capacity | Jib | FleetNow used prices |
|---|---|---|---|---|---|
| JLG 400S | 40 ft | 33 ft 3 in | 600 lb (1,000 lb restricted) | No | $19,850 to $59,950 |
| Genie S-40 / S-40 XC | 40 ft | 31 ft 8 in (S-40 XC) | 660 lb (1,000 lb restricted) on the S-40 XC | No | $21,900 to $34,900 |
| Genie S-45 / S-45 XC | 45 ft | 36 ft 2 in (S-45 XC) | 660 lb (1,000 lb restricted) on the S-45 XC | No | $17,900 to $59,900 |
| JLG 460SJ | 46 ft | 39 ft 7 in | 600 lb | Yes, 6 ft | $18,900 to $110,900 |
The 400S and Genie S-40 are close matches, and the 400S has slightly more outreach. If you need more height or reach, step up to a 45 ft boom like the Genie S-45, or the JLG 460SJ, whose jib helps position the platform more precisely. Older Genie S-40 and S-45 units built before the XC versions are rated for 500 lb.
JLG 400S Mechanic Ratings
Three mechanics at OHR Rents, which services aerial equipment every day, rated the JLG 400S:
| Category | Average Rating |
|---|---|
| Performance | 4.3 out of 5 |
| Reliability | 4.7 out of 5 |
| Serviceability | 4.3 out of 5 |
One mechanic gave it 5 out of 5 across the board, one gave it 4 for performance and serviceability and 5 for reliability, and one gave it 4 out of 5 across the board, for an overall average of 4.4 out of 5.
JLG 400S Pros and Cons
| Pros | Cons |
|---|---|
| 1,000 lb restricted capacity is high for a 40 ft boom | No jib, so it can’t reach up and over obstacles like an articulating boom |
| 4WD and 45% gradeability handle rough job sites | 2 ft 10 in tailswing needs clearance next to walls and traffic |
| About 13,500 lb, so it is lighter and easier to haul than larger booms | Engine-powered, so it is mainly for outdoor use |
| Very common in rental fleets, so parts, service and used units are easy to find | Many used units are high-hour former rental machines |
| Dual-fuel option for jobs where diesel is not allowed | At 40 ft, some jobs will need a 45 ft or 60 ft boom |
Overall, the 400S is a dependable, affordable 40 ft boom for outdoor jobs where the path to the work area is clear.
Common Uses for the JLG 400S
- Construction: steel erection, framing, exterior finishing, siding, windows and roofing work.
- Facility maintenance: servicing lighting, signage, HVAC equipment and building exteriors.
- Electrical work: running conduit and wiring and installing fixtures at height (a standard 400S is not insulated, so keep a safe distance from power lines).
- Painting and inspection: reaching high walls, overhangs and structures for painting, repairs and inspections.
- Tree care: pruning and trimming, following the same power line precautions.
JLG 400S Price
Prices depend on model year, hours, engine type, tires and options. Here is what buyers can expect in October 2026:
| Condition | Typical price |
|---|---|
| New (dealer price) | About $90,000 |
| Used on FleetNow (2007 to 2023 model years) | $19,850 to $59,950 |
| Typical used asking price | About half of listings are $25,000 to $35,000 |
New pricing is based on a dealer listing for a new 2026 400S at $89,640 (before tax and freight). Used prices come from 39 JLG 400S listings on FleetNow. Hours, condition and options explain most of the price spread.
What to Check Before Buying a Used JLG 400S
- Hours and records: check the hour meter, service records and the last annual inspection.
- Boom: look for cracked welds, bent sections, worn wear pads and play in the boom and platform pins.
- Hydraulics: check cylinders and hoses for leaks, and make sure the boom holds position without drifting down.
- Controls: test every function from the platform and ground controls, plus emergency lowering.
- Safety systems: confirm the tilt alarm, foot switch, all-motion alarm and capacity indicator work.
- Turntable: rotate a full 360 degrees and listen for grinding or rough spots in the swing bearing.
- Drivetrain: drive in both directions, test the brakes and check the oscillating axle.
- Engine: look for hard starting, heavy smoke and warning lights, and ask for a fault code scan.
- Tires: check for cuts, chunking and uneven wear.
- Platform: make sure the gate closes properly, the lanyard anchors are intact and the decals and manual are present.
How to Operate a JLG 400S
This video from Alexander Equipment Rental walks through the 400S’s ground and platform controls and basic operation. It is a helpful overview, but it does not replace operator training and the manufacturer’s operator’s manual.
Shop JLG 400S Boom Lifts With FleetNow
FleetNow lists used JLG 400S boom lifts from dealers and rental companies across the country. Browse all JLG 400S listings, compare other JLG telescopic boom lifts, or widen your search to all telescopic boom lifts and all used boom lifts.
Need help finding the right machine? Contact the FleetNow team. Selling a boom lift? List your equipment on FleetNow.
JLG 400S FAQs
The JLG 400S has a 40 ft platform height, which gives a working height of about 46 ft. Its maximum horizontal outreach is 33 ft 3 in.
The 400S is rated for 600 lb unrestricted, which applies anywhere in the working envelope. In restricted mode, it can carry 1,000 lb with reduced outreach. Both ratings include people, tools and materials.
A JLG 400S weighs about 13,400 to 13,650 lb, depending on model year and options. It is 7 ft 7 in wide and 24 ft 10 in long when stowed.
The 400S is offered with a 49 hp Deutz D2.9 Tier 4 Final diesel or an 82 hp GM Vortec 3000 dual-fuel (gas/LP) engine. Engines vary by model year, so check the machine you are buying.
The 460SJ reaches 46 ft with 39 ft 7 in of outreach and adds a 6 ft jib for precise positioning, but it is rated for 600 lb and weighs about 16,400 lb. The 400S is lighter, reaches 40 ft and offers a 1,000 lb restricted rating. See JLG 460SJ listings.
The 400S is an engine-powered, rough terrain boom lift built mainly for outdoor use. Running it indoors requires good ventilation and following site rules for exhaust. For most indoor work, an electric boom lift is a better fit.
Used JLG 400S boom lifts on FleetNow list for $19,850 to $59,950 as of October 2026, and about half of listings are $25,000 to $35,000. A new 400S costs about $90,000. Shop JLG 400S listings.
