14.07.2006

Wolffkran launch new flat top city

Wolffkran hosted a well attended open day this week, the first since the company was bought out from the MAN group by Dr. Peter Schiefer and Dr. Hans-Peter Koller. The occasion was the official launch of the new compact, easy erect 4517 flat top city crane.
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Dr. Peter Schiefer

The new Wolff 4517 city is the smallest crane in the company’s current product range and yet it can utilize all of Wolff’s latest components. The crane has a maximum jib length of 50 metres and capacity of 6 tonnes. The company says that this is the first of an all new city crane range.
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The New Wolffkran 4517 City

Thanks to the compact dimensions of its key modules, a 4517 city configured with a 35.5
metres height under hook and 45 metre jib length, can be transported on just two trucks. Once on site, the easy-connect electronic components and the new sub assembly design significantly reduce erection and commissioning times.
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The tower head and turntable is lifted into place

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The Jib is lifted into place fully reeved and ready to go

The crane uses a new TFS12 tower system, with the same pin type connections for both tower and jib as the Wolff TFS 15 tower, but with a new width of 1.2 metres.
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The Jib is quickly fitted

The cranes winches are fully guarded by being fitted within the jib structure. This also allows the crane to be fully reeved while on the ground, for greater speed and improved safety. An automatic re-reeving device allows rapid switches between two and four fall operations.
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On goes the back jib

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All it needs now is the counterweight

The counterweight sections are all under three tonnes. Wolff also says that by using a single size the risk of confusing counterweights is eliminated.
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Each of the seven slabs of counterweight is identical and under three tonnes

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The last of the counterweights go in

The jib can be extended in 2.5 metre steps from 25 up to 50 metres.

The maintenance cage is fixed to the trolley. A multilingual readout in the cab, similar to that used on Wolff’s larger cranes, provides user information and diagnostics as well as simple menu guided settings of the load-limiting device and of all limit switches.
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(L-R)David Lawrence, HTC sales director, Uli Dorsebach, Wolffkran engineering director, and Alex Lowe, HTC General manager admire the new crane

The Wolff 4517 city replaces both the WK 71 SL and the WK 91 SL