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Kobelco RK250

Series: Kobelco Rough Terrain Crane

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With the RK250, Kobelco offers a model from the Kobelco Rough Terrain Crane series. The engine delivers 214.8 hp (158 kW), with a displacement of 7,546.2 cm³. The engine comes from Mitsubishi. Torque is 706.1 Nm. Rated speed is 2,800 rpm. The machine is 11,000 mm long and 2,500 mm wide. The unladen weight is 26,495 kg. The wheelbase measures 3,700 mm. The tank holds 300.2 litres. The gearbox has 3 forward gears. There are also 1 reverse gears. Maximum torque is reached at 1,250 rpm. The hydraulic tank holds 370.2 litres. The electrical system runs on 24 V. The engine fitted is the 6D16TUA. Tyre size: 445/95R25 177E. The Kobelco Rough Terrain Crane series covers 3 models. Rated output within it ranges from 214.8 to 320.1 hp; the RK250 sits at the bottom of that range with 214.8 hp. Its immediate neighbours are the RK250-II above it with 214.9 hp. Unladen weight within it ranges from 26,290 to 37,460 kg; here the RK250 sits at the bottom of that range with 26,495 kg. 100 Kobelco models across 7 series are on record.

Kobelco Rough Terrain Crane – the RK range: single-cab rough terrain cranes with Mitsubishi diesel engines, 158 to 235 kW, operating weights of 26.3 to 37.5 tonnes

Kobelco is the construction-machinery brand of Kobe Steel Ltd, headquartered in Kobe, Japan; alongside hydraulic excavators, the company also builds rough terrain cranes for unpaved job sites. Unlike truck-mounted cranes, these machines carry only a single cab from which both driving and crane operation are handled, and they run on large off-road tyres with all-wheel steering. The range spans the RK250, the updated RK250-II and the larger RK450-2; the suffix -II or -2 marks a reworked generation. All three models are powered by diesel engines from the Mitsubishi group.

Read on 3 more paragraphs

The register lists here 3 versions with 158 to 235.4 kW output, torque from 627.7 to 1,157.2 Nm at rated speeds between 2,200 and 2,800 rpm, and operating weights from 26,290 to 37,460 kg. The largest recorded version is about 11,000 mm long and 2,500 mm wide; the Mitsubishi engines fitted are the 6D16T, 6D16TUA and 6D22TC.

Rough terrain cranes such as the RK range compete chiefly on Japanese and South-East Asian job sites against comparable models from Kato and Tadano, where compact dimensions, strong off-road mobility and quick set-up over truck cranes make the difference.

When buying used, what matters is the condition of boom and hoist, the tightness of the hydraulic cylinders, wear on the off-road tyres and steering knuckles, and a complete inspection record for rigging and wire ropes; spares and service run through the Kobelco dealer network.

Sources: SpecCodex register, model data: Kobelco Rough Terrain Crane

Technical data

Engine

Engine make	Mitsubishicorrect
Engine model	6D16TUAcorrect
Power	214.8 hp (158 kW)correct
Rated speed	2,800 rpmcorrect
Torque	706.1 Nmcorrect
Speed at max. torque	1,250 rpmcorrect
Displacement	7,546.2 cm³correct

Dimensions and weights

Length	11,000 mmcorrect
Width	2,500 mmcorrect
Wheelbase	3,700 mmcorrect
Unladen weight	26,495 kgcorrect

Drivetrain and chassis

Forward gears	3correct
Reverse gears	1correct
Tyre size	445/95R25 177Ecorrect

Working data

Hydraulic oil capacity	370.2 lcorrect
Fuel tank capacity	300.2 lcorrect

Other data

System voltage	24 Vcorrect

Where this model stands

Power-to-weight ratio: 6 kW/t (158 kW / 26.5 t)

Stronger than 25% 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 Kobelco RK250 have?

The Kobelco RK250 delivers 215 hp.

How much does the Kobelco RK250 weigh?

The unladen weight is 26,495 kg.

What engine does the Kobelco RK250 have?

7,546 cm³ displacement.

What are the dimensions of the Kobelco RK250?

11,000 mm × 2,500 mm.

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 19 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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