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Kobelco RK250-II

Series: Kobelco Rough Terrain Crane

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The Kobelco RK250-II is a model in the Kobelco Rough Terrain Crane series. The engine delivers 214.9 hp (158.1 kW). The engine comes from Mitsubishi. Torque is 627.7 Nm. Rated speed is 2,800 rpm. The unladen weight is 26,290 kg. The wheelbase measures 3,450.1 mm. Maximum torque is reached at 1,600 rpm. The electrical system runs on 24 V. The engine fitted is the 6D16T. Tyre size: 16,00-25-28PR. The Kobelco Rough Terrain Crane series covers 3 models. Rated output within it ranges from 214.8 to 320.1 hp; the RK250-II sits at the bottom of that range with 214.9 hp. Its immediate neighbours are the RK250 below it with 214.8 hp and the RK450-2 above it with 320.1 hp. Unladen weight within it ranges from 26,290 to 37,460 kg; here the RK250-II sits at the bottom of that range with 26,290 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.

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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	6D16Tcorrect
Power	214.9 hp (158.1 kW)correct
Rated speed	2,800 rpmcorrect
Torque	627.7 Nmcorrect
Speed at max. torque	1,600 rpmcorrect

Dimensions and weights

Wheelbase	3,450.1 mmcorrect
Unladen weight	26,290 kgcorrect

Drivetrain and chassis

Tyre size	16.00-25-28PRcorrect

Other data

System voltage	24 Vcorrect

More machines with this engine (Mitsubishi 6D16T, 3)

Where this model stands

Power-to-weight ratio: 6 kW/t (158 kW / 26.3 t)

Stronger than 26% 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-II have?

The Kobelco RK250-II delivers 215 hp.

How much does the Kobelco RK250-II weigh?

The unladen weight is 26,290 kg.

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 11 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.

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