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CAT | Building, mining & Construction equipment

This is a scale 1 : 100 model of the Krupp 288 bucketwheel excavator.

These machines work in the open pit browncoal mines in the German Rhineland, near Aachen.

This is what it looks like in reality, 220 m long, almost 100 m high and a weight of 13.500 tons.

The Lego model is driven by 13 motors and has infrared remote control.








It has 12 tracks, each pair of them driven by an XL motor. Even with a very big reduction, these 6 motors can hardly set the thing in motion.








The bucket wheel. The model has 12 buckets while there are 18 in reality.








Here the product falls from the buckets onto the first conveyor belt.










The first conveyor runs along the length of the digging boom.








It ens in the center of the  coal or sands drops on a conveyor which is in the undercarriage.








Here the product comes out of the undercarriage and is transferred onto the discharge boom.








The discharge boom rest on a separately driven and steered vehicle.It has 3 tracks and the model is driven by 1 medium motor. It is used to keep the discharge above the conveyor belt that runs along the length of the mine, to the power station, or in case of digging overburden, to the opposite side of the mine, where the sand is redeposited.








The digging boom is hoisted up and down by 2 winches, which are located at the end of the counter boom. From here the hoisting wires run to the top of the stationary tower.







The wire is looped multiple times between the stationary tower and the moving tower, which is 1 part with the digging boom.

See some video on YouTube

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This is a model of the backhoe dredger Pinocchio, owned by the Belgian DEME Group. Equipment of this kind is used to dredge harbour bottoms, canals and the like. The soil is deposited into barges floating alongside the dredger.  The floating on the water is simulated by setting up the model on 4 (yellow) columns. The most striking features of Pinocchio are the 3 spud legs and, of course, the Liebherr 996 Litronic digger. The spud legs can be lowered onto the seabed by winches. In reality the spuds can be forced into the bottom using the power of the winches, but this proved to be too much of a challenge for my model. My spuds are lowered by the winches, aided by gravity, and as soon as they touch the bottom, wires become slack. The spudwires of this model are looped over sheaves in the top of the spud legs, to make it look more realistic. Pinocchio has no propulsion of itself, and to make it move, the forward spud leg is fitted in a spud carrier, which can travel athwartships over a  few meters. When the vessel is floating, the forward spud firmly into the seabed and the two other spuds raised, she can “walk” forward or aft.  The Liebherr excavator is quite a monster, driven by 2 powerful V-engines and fitted on the pontoon on a flexible mounting.

This photo shows the spud hoisting winches. Both winches are drive by a single 9V motor, located somewhere below the superstrucrure. I used a single silk kite wire running from winch to winch via both spud legs.


This is the forward end of the vessel, showing the slot for the spudcarrier. The winch is fitted on the spucarrier and driven by a medium PF motor. The spudcarrier is moved by a winch, with 1 wire, of which both ends are spooled onto the wire, similar as I described in the post “Tower crane hook travelling”. This winch is driven by a large PF motor.



Here’s the Demag 996 Litronic excavator. Slewing is on a custom built bearing and driven by large PF motor, which is built into the cylindrical part below the rotating deck. On the lower level, the air intakes are seen. The boom is moved by 2 linear actuators which have 1 driving motor, just aft of them in the engine housing. The next part of the boom assembly, which is called the stick is also moving by means of 2 LA’s. Their single medium PF motor is built into the boom. Finally, the bucket is moved by 2 small LA’s, also driven by a medium PF motor, built into the upper part of the stick.

Contrary to previous models I tried to add a bit more detail, such as self made decalls, hydraulic hoses and the exhaust pipes






Below are some more details.





















This is the real Pinocchio:

It is a pity I Lego does not produce the typical DEME colours. The lime green of the hull became normal green and the dark green of the deck and winches became black and grey.








Here is some video :



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