Telescopic-Boom Truck-Mounted Cranes
12 t Semi-Trailer Mounted Crane — Tractor and Trailer, 300 kN·m Telescopic Boom
A 12 t telescopic crane mounted on a tractor and semi-trailer combination. Load and unload at both ends of the journey without hiring a second machine. Left-hand drive standard; right-hand drive available on request.
Short answer. This is a 12 t Chengli SQS300-5 telescopic crane mounted on a Dongfeng 6x4 twin-drive tractor and semi-trailer combination, so the load can be handled at both ends of the journey without a second machine. The five-section octagonal boom runs 5.9–19.5 m and lifts 12,000 kg at a 2.5 m radius at a 300 kN·m (30 t·m) lifting moment, with a 19.5 m maximum working radius. The tractor runs a 465 hp Dongfeng Longqing engine through a 14-speed gearbox at a 49,000 kg gross vehicle mass, and the trailer body measures 13,750 × 3,000 × 600 mm. Left-hand drive is standard; right-hand drive is available on request.
Published by Truck Crane China — we build truck-mounted cranes, grab trucks and wrecker trucks on Chinese chassis for export.
Built to order, not from stock. Cranes come either from our own production or sourced to your specification — available brands include WHHC, XCMG, SANY and Zoomlion. Chassis are sourced from SINOTRUK, SHACMAN, Dongfeng, FAW Jiefang, Foton, Isuzu, JMC or JAC. We engineer the subframe and mounting, fabricate the body, and deliver one finished, road-ready truck from our Suizhou works.
Left-hand drive (LHD) is standard. Right-hand drive (RHD) is available on request and is built to order.
Complete Specifications
Parameter | Value |
|---|---|
Tractor | Dongfeng 6x4 twin-drive tractor |
Steering | Left-hand drive (LHD) standard. Right-hand drive (RHD) available on request. |
Engine | Dongfeng Longqing, 465 hp |
Gearbox | 14-speed, manual shift |
Wheelbase | 3,350 + 1,350 mm |
Axle load | 7,000 kg front / 18,000 kg rear (tandem) |
Tyres | 12R22.5 18PR |
Fuel tank | 650 L |
Seats | Leather |
Brakes | ABS; air service brake, air-cut spring parking brake |
Telematics | Beidou GPS |
Headlights | LED |
Trailer body dimensions | 13,750 × 3,000 × 600 mm |
Gross vehicle mass | 49,000 kg |
Emission | Euro 5 |
Crane | Chengli SQS300-5 — 12 t telescopic boom |
Boom | Five sections (four telescopic), octagonal section, 5.9–19.5 m |
Max. rated lifting capacity | 12,000 kg at 2.5 m radius |
Max. lifting moment | 30 t·m (300 kN·m) |
Max. working radius | 19.5 m |
Max. lifting height | 19.5 m |
Max. lifting height, basic boom | < 6 m (excluding chassis) |
Boom lifting time | < 20 s |
Boom extension time | < 25 s |
Luffing range | 1–75° |
Slewing | 360° continuous, < 2.5 r/min |
Outriggers | H-type, span 2.5–7.6 m |
Auxiliary rear outrigger | Hydraulic, max. span 3.2 m |
Hydraulic system pressure | 24 MPa |
Hydraulic oil tank | 150 L (minimum) |
Hydraulic flow | 60 L/min |
Hook speed | 8 m/min |
Wire rope | 12 mm × 115 m |
Crane self-weight | < 5,500 kg |
Mounting space required | 1,250 mm |
Operating temperature | −15 °C to +40 °C |
Safety devices | Relief valve, balance valves (luffing, telescoping, hoist), hydraulic locks, anti-two-block alarm, boom-head work light |
Main multi-way valve | Imported |
Load chart basis | Fully extended outriggers, rear-side lifting; capacity per actual radius |
Capacity at 2.5 m radius | 12,000 kg |
Capacity at 5.5 m radius | 5,130 kg |
Capacity at 8.5 m radius | 2,660 kg |
Capacity at 11.5 m radius | 1,420 kg |
Capacity at 19.5 m radius | 500 kg |
Crane figures are taken from the manufacturer's data sheet for the SQS300-5. Trailer body dimensions and the load chart for a specific configuration are confirmed per order.
Questions buyers ask about this 12 t semi-trailer mounted crane
How much can it lift at the working radius?
12,000 kg at a 2.5 m radius, falling to 500 kg at the 19.5 m maximum working radius.
What is the boom configuration?
Five sections, four of them telescopic, in an octagonal section running 5.9–19.5 m, with a 300 kN·m (30 t·m) lifting moment.
What outriggers does it have?
H-type outriggers with a 2.5–7.6 m span, plus a hydraulic auxiliary rear outrigger of up to 3.2 m.
What tractor and driveline does it use?
A Dongfeng 6x4 twin-drive tractor with a 465 hp Dongfeng Longqing engine, a 14-speed manual gearbox and a 3,350 + 1,350 mm wheelbase.
What is the gross vehicle mass?
49,000 kg, on 7,000 kg front / 18,000 kg rear axle loads.
How fast does the crane slew, and by how much?
It slews 360° continuously at under 2.5 r/min, with a boom lifting time under 20 s and a boom extension time under 25 s.
Other builds in this range: HOWO 380 HP Tractor with 16 Ton Zoomlion Crane and 3-Axle and Off-Road Telehandler (RT Crane) SX1840, 4 t / 18 m.
