I recently saw a review video of a BB emergency crane train set BR733. The review was not really positive, especially with regard to the design, the details, etc. So I thought: "There has to be a better way of doing this". It's up to you now to decide whether it's better in the end or not ...
The original Multi Tasker 1200 and the video I watched was the inspiration for this MOC. I figure out quite fast, that the project wasn’t as simple as it looked from the beginning. There are still deviations from the original crane, compromises which you always have with interlocking bricks. Even I tried to make the model better than the crane set I saw in the video, I still couldn’t realize everything I planned in the beginning of this project.
I will not go into many details of the original crane train. Information about it you can find here.
Compromises were necessary, to make the crane train able to run on the Lego tracks, especially the curves and turnouts. For example, the rear part of the crane is not supported on the counterweight carriage, as it is with the original crane. Only the telescope arm of the train is supported with a pin on the crane spacer car to reduce the total weight of the crane car, like the original. So, the crane train can pass any curved track or turnouts down to R40. The crane arm is forced into curves and follows the course of the curve. As a result, the crane arm does not protrude excessively beyond the curve radii.
The original crane can move by itself. I didn’t realize this feature in the model but at least, my crane car has 4-axle bogies like the original.
As the original, the model consists of the crane car itself, the crane spacer car, the counterweight car, the workshop wagon as well as the crew coach. Inspired by this video (time 1:37 – 1:42), I gave the train a locomotive to pull it around. The locomotive is basically my popular BR110, but in a new colour scheme and new motorization concept.
The crane train has some functions:
1) You can turn the crane 360 degrees.
2) You can turn the boom only and the counterweight remains in position.
3) You can extend the boom (telescope 30 – 45 cm).
4) You can raise and lower the crane hook.
5) You can stabilize the crane with 4 outriggers.
6) The conveyor moves the counterweight towards the crane.
7) You can use two different crossbeams depending on the load.
8) Hoisting capacity until 0.5 kg (provided you use best quality parts).
MOC stats:
Total train length: 244.9 studs
Width: 9.4 studs
Height: 14.6 studs
Weight: 3800 grams
Parts: approx. 4100
I provide a detailed step-by-step building instruction. At the end of it, you find an overview of all needed parts.
A print-ready sticker sheet is available too (in case the model contains stickers). I provide it in the widely used PDF-format in high-resolution and print-ready.
Furthermore, I provide the parts list in Excel format. This makes it easy to filter out needed parts and create order lists.
Disclaimer: I am not responsible for any damages or injury on parts and humans happen while following my instructions. Everything you do is your responsibility and under your personal risk.
Link to the instruction and sticker files:
Link to more pictures of the model:
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