40m Boom Lift

The STJ400N is a heavy‑duty diesel‑powered telescopic boom type mobile elevating work platform built for ultra‑high‑level site assignments. Delivering a maximum working height of 40 meters, this unit is engineered to tackle demanding high‑elevation tasks across heavy‑industry environments. It is fitted with a Cummins B3.9 diesel power unit outputting 59 kW at 2500 revolutions per minute. The primary boom delivers luffing movement spanning ‑11° up to 70°, alongside unrestricted full‑circle continuous 360‑degree turret slew rotation. Its operator basket features ±90‑degree horizontal swing capability, with a safe rated payload of 250 kg. Boasting 25‑percent climbing capacity paired with robust heavy‑duty off‑road rubber wheels, this machine copes well with rough, un‑levelled job‑site terrain. Typical deployments include ship‑repair yards, high‑rise building exterior refurbishment, large‑scale sports venue erection, plant overhead equipment servicing and other complex high‑altitude work assignments.

①Key Features

Stable power system: Cummins B3.9 diesel engine provides stable power for long-time continuous heavy-duty work. The 230L large fuel tank reduces refueling frequency and improves site working efficiency.

Flexible multi-angle operation: The boom luffing angle ranges from -11° to 70°, with 360° continuous turret rotation. The work platform supports 90° left-right swing, so operators can reach complex working points without moving the whole machine repeatedly.

Strong terrain adaptability: 25% gradeability, 12.00-20 heavy-duty tires and 290mm ground clearance allow driving on gravel and uneven construction sites. Reinforced chassis keeps stable under full lifting status.

High safety performance: Optimized hydraulic system and complete safety protection structure. The 22-ton total weight ensures stable operation even at maximum working height.

②Application Scenarios

Suitable for ship maintenance, high-rise building exterior wall renovation, large venue construction, industrial factory overhead maintenance, bridge engineering and other high-altitude working projects.

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