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Modellbericht

In den letzten Jahren ist die Anzahl an interessanten Modellen zunehmend größer geworden. Die Auswahl für die heimische Sammlung ist für uns Sammler daher nicht einfacher geworden. Deswegen werden wir an dieser Stelle in lockerer Reihenfolge Modellberichte bzw. Modellbesprechungen präsentieren.

The largest AT crane:
     Liebherr LTM 11200-9.1 from NZG

By Carsten Bengs*

By introducing the all new LTM 11200-9.1 at bauma 2007 Liebherr one more time is expanded into the super class of telescopic cranes and has relegated the legendary Gottwald AMK 1000 from the throne of the worlds largest cranes to position 2.

Currently NZG's largest model in the market

LTR 1000While the 1200 t capacity crane already proofs its advantages very successfully in reality for companies as Mammoet, McNally, van Marwijk or Eisele, collectors can now look forward to a fantastic and huge die-cast model of this impressive Liebherr LTM 11200-9.1. Interestingly it is the very first Liebherr AT crane coming from NZG. And that was why I was even more curious how NZG copied this crane with its functionality since this is also the biggest model for NZG ever. Luckily the Nurnberg based model specialists presented one more time a highly detailed crane model with an absolutely excellent level of functionality exceeding my expectations. For this review story I got a pre production sample of which I took the pictures and which was really fascinating.

Nearly all boom combinations can be shown on the model based on the standard boom: boom with 3 sections (T3) and with 7 sections (T7) as well as boom with 7 sections and hydraulically adjustable lattice jib (T7NZF). Additionally all combinations can be added by the Y-guying system which increases lifting capacities.

10While assembling the crane I simply can show also the self-assembly system very well. Due to the heavy weight of more than 100 metric tons with all 7 boom sections it has to be transported separately. I started with supporting the boom on its four outriggers. Afterwards, as in reality, I move the crane carrier underneath the boom until I can fix both by using a „real“ bolt. This bolt is not a simple wire nail, but a real bolt painted in the Liebherr yellow. Screws connect both hydraulic hoist cylinders.

13During this very first assembly I had chosen the maximum combination with all 7 boom sections, adjustable lattice jib and Y-guying system. The well-known system of small screws and nuts – as on NZG’s Grove GMK 7550 or Liebherr HS 855 – is used to assemble the jib and the guying system. The last one is equipped with an authentic looking pendant line in the back.

While extending the boom I move both guying winches by using a special key. In order to provide stability once the boom is fully extended a special locking mechanism allows tensioning the complete boom. Both winches are spring-loaded and can be operated by giving little pressure on it.

That is how I proceed with all boom sections – with exception of the last one. Because of my ceiling the maximum height of the crane is limited.... Fully extended the maximum boom length of the model is 2,25 m! This length comes to 1,25 m when rigged only with the T3 boom system.

Conclusion:

After reviewing this great crane model in detail I really can say that this flagship of NZG’s model range is really an impressive and fantastic addition to the crane collection at home. And NZG did a great job on it! It features the complete functionality as in reality, which I highly appreciate. The level of details is typically high, as we would expect from NZG and it even has some totally new features. So, let’s wait on the hopefully coming company liveries. The forthcoming Mammoet version I have already ordered!

1

LTM 11200-9.1 rigged with T7Y boom and Y-guying system. For this photo shooting I have extended only one boom section. Otherwise you wouldn’t have seen so much on these pictures.

2

Also with this T3Y- boom system the LTM 11200-9.1 model makes a great impression. For this picture I have disassembled the upper 4 boom sections. Here I recommend doing this very carefully. The internal locking mechanism is also spring loaded and you might loose this spring once you disconnect the boom parts.

3

Impressively the crane model shows its massive boom within the warm September sun during is photo shooting. All filigree screw connections can hardly bee recognized. The whole boom system can be adjusted in two different angles.

4

By having a look into the carrier’s cab you easily can imagine the huge space inside. Windscreen wipers, warning lights and mirrors also exist on the model.

5

Also on the huge 9-axle crane carrier, which has a weight of 108 metric tons in reality, the level of details is amazing. NZG surprises with individually steerable axles, which are all spring loaded! And this I really didn’t expect.

6

The crane during traveling: The crane cab shows to the front, while the boom cylinders are positioned to the backside. Even a license plate is indicated on the back and front side!

7

While traveling all handrails on the superstructure are disassembled to not exceed the maximum transport height. All railings I can easily place inside the appropriate holes.

8

A small ladder and a warning light exist on the backside of the crane carrier. Small hydraulic cylinders would move the fur massive outriggers. Even a small toolbox is fitted to one outrigger.

9

During its self-assembly the boom is supported by its outriggers. All of these are being brought into their assembly position and secured by a small pin. Afterwards I move the outrigger pads into a vertical position; a special locking mechanism ensures that these always stay stable.

10

All outrigger pads I expand and connect the four pads to the outriggers with four pins. Luckily NZG has placed the screw thread to the inside where you won’t see it. And this looks completely realistic as a hydraulic cylinder on the real crane. Hopefully we will find this nice feature also on possible future crane models.

11

Two massive bolts to the superstructure connect the heavy boom. You can also recognize railings and connection points for them. An auxiliary winch is also indicated on the model.

12

And with this all-new crane cab, Liebherr also breaks new ground: the cab is attached to a new boom system. The operator can easily access the cab direct and safely from the ground without using ladders. And this parallel kinematics is also well copied on the model: from 8 cm eye level or 4 m in reality the operator can overview the working area. Of course the cab can be tilted backwards to avoid an aching neck.

13

The Y-guying system always is connected to the boom; small hydraulic cylinders would move it into the working position.

14

Two massive hydraulic cylinders can adjust the lattice boom. With this additional jib the crane would be best fitted for a windmill application. And you can also show the crane with booth hook blocks; be it the 320 t main hook block or a similar one you might have in your collection at home.

15

The main boom head on the T3 version is also connected by the small screws and nuts as well as the sheaves for the guying system. And by the way, all sheaves are single ones and easily rotatable.

16

Three different hook blocks are provided together with the model; in reality these would be responsible for a load of either 320, 112 or 16 metric tons. The last one is a single line hook. Depending on the boom system you need to choose the hook. For this heavy-duty application with T3 boom the 11-sheave main hook has to be used.

17

For the T7-version with or without lattice jib I use the 3-sheave hook for loads up to 112 metric tons. All hook blocks come equipped with easily rotating sheaves; and the hook itself is also rotatebale.

18

These accurate details continue also onto the crane carrier. Engine exhaust, air filter and access ladders are copied very well. Even a small toolbox attached to one outrigger exists beside of the standard lightings, mirrors wipers and even a license tag!

19

On the superstructure you can see the handrails, stairs and access walkways. The engine exhaust is also inserted in its special position. A small space between the handrails provides space for the Y-guying system.

20

For the first time NZG uses here also pistons looking as in reality; the screw thread is positioned within the outrigger and cannot be seen from outside – which looks great. The outrigger pads then I fix with small bolts on each outrigger. Together with the crane mats this is a really fantastic detail on this giant.

21

While traveling the outriggers rest in a special space in-between the carrier. And on all tires you can find authentic rims and also the tire manufacturer ”Michelin” is integrated into the tires.

* Carsten Bengs is author of the O&K chronical „Orenstein & Koppel – 125 Baumaschinen, Lokomotiven und Traktoren“. He is also writing as a free-lance editor stories about construction die-cast models for the magazines ToyTrucker & Contractor (USA) and TruckModell (D).

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