Liebherr R 994 B Litronic

Model of a mining excavator in front shovel configuration in scale 1:28.5. This 300 tonne machine is a representative of Liebherr's most popular size class and is ideally suited to load a fleet of 100 tonne payload mining trucks.

 

When LEGO introduced its 42100 Liebherr R 9800, I knew I had to get that set immediately after release. But I also knew from the beginning, that I would not like the official model's Technic design and that I had to build my own version.

 

Here it is, scaled larger than 42100, but on the other hand representing a much smaller machine than the 9800. About 300 vs. 800 tonnes in real life. This allowed me to use the main components of the official LEGO model to build my R 994 B. I used the clamshell bucket, the Power Functions XL actuators and the tracks and sprockets.

 

The main difference from 42100 lies in the electric components of my model. The following functions are all powered by two Power Functions rechargeable battery boxes and controlled by three SBricks via bluetooth connection and Brick Controller 2 app:

 

- Left and right crawler treads each using a Power Functions L motor

- Slewing of the upper structure using two Power Functions M motors

- Boom cylinders: one Power Functions XL motor

- Stick cylinders: one Power Functions L motor

- Bucket cylinders: one Power Functions M motor

- Clamshell bucket: one Brick Engine V1 motor (compatible to Power Functions)

- Access ladder: one Power Functions M motor

- Service flap: one Power Functions M motor

- Lighting: three pairs of Power Functions LEDs

 

Besides the main drive and digging functions, the model features a retractable access ladder and a lowerable service flap on the underside of the upper structure frame. The service flap is used to refuel and grease the excavator.

 

While building the Liebherr R 994 B Litronic in 1:28.5 scale, I could refer to a highly detailed diecast model of the very same machine in 1:50 scale.

Done