Demag AC40-1
Built: 1999-2004 · Series: AC
More machines from model year 1999
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Demag AC – road-registered all-terrain cranes from the compact City class to large cranes: AC 40 to AC 700, six to eight cylinders, 205 to 480 kW, operating weights up to 95,750 kg
Demag, which grew out of Duisburger Maschinenbau AG, has built mobile cranes since the 1960s and now operates as part of the crane group Tadano; the AC series denotes all-terrain cranes with road registration that, unlike lattice-boom crawler cranes, drive to the site on their own axles. The type number after AC roughly gives the maximum lifting capacity in tonnes, from the AC 40 with about 40 tonnes to the AC 700 with about 700 tonnes; suffixes such as -1, -2 or -5 mark the series generation, CITY the especially compact city cranes.
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The register lists here 26 versions with 205 to 480 kW from six- and eight-cylinders of 6,374 to 15,928 cm³ displacement, operating weights from 32,650 to 95,750 kg, gross weights from 33,000 to 96,000 kg and widths from 2,500 to 3,000 mm.
All-terrain cranes such as the AC series combine the road speed of trucks with the off-road capability of crawler cranes, making them the most versatile construction cranes for changing job sites; alongside Liebherr and Grove, Demag ranks among the established makers of this class and covers the full span with the AC range, from compact city cranes to large cranes for heavy-lift and wind-turbine assembly.
On a used example, the operating hours of the carrier and the superstructure, the condition of the telescopic boom (wear on the slide pads, tightness of the hydraulic cylinders), the operation of the winches and boom extension, and inspection records and maintenance history count, since cranes are subject to regular expert inspections; parts and service run through the Tadano Demag network.
Sources: SpecCodex register, model data: Demag AC
Technical data
Engine
| Power | 205 kWcorrect |
|---|---|
| Cylinders | 6correct |
| Displacement | 6,370 cm³correct |
Dimensions and weights
| Length | 8,640 mmcorrect |
|---|---|
| Width | 2,500 mmcorrect |
| Wheelbase | 4,120 mmcorrect |
| Unladen weight | 32,750 kgcorrect |
| Gross vehicle weight | 33,000 kgcorrect |
Drivetrain and chassis
| Wheels | 6correct |
|---|---|
| Top speed | 80 km/hcorrect |
Where this model stands
Power-to-weight ratio: 6.3 kW/t (205 kW / 32.8 t)
Stronger than 41% of the mobile & rough terrain cranes in the register — out of 723 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Demag AC40-1 have?
The Demag AC40-1 delivers 205 kW.
How much does the Demag AC40-1 weigh?
The unladen weight is 32,750 kg.
What is the gross vehicle weight of the Demag AC40-1?
33,000 kg.
What engine does the Demag AC40-1 have?
6 cylinders, 6,370 cm³ displacement.
How fast does the Demag AC40-1 go?
Top speed is 80 km/h.
What are the dimensions of the Demag AC40-1?
8,640 mm × 2,500 mm.
When was the Demag AC40-1 built?
Production years: 1999-2004.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 13 individual figures for this model. They come from 2 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
The technical data on this page comes from official vehicle registration records (RDW/Traficom), not from the manufacturer.
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Other models in this series
AC 100-K5205
AC 100/41
AC 120-1
AC 140 COMPACT
AC 155L
AC 160-5
AC 200-1P
AC 220-5
AC 250-5
AC 350
AC 350/6
AC 40 CITY
Mobile crane in 3D section
Turn the model, look inside and click an assembly — each one is explained.