Cyberbrick RC Dumptruck

RC Articulated Hauler

Inspiration and scale

Now that my wheel loader project was finished, I wanted to build another construction vehicle. I really like the look of articulated haulers, especially their steering mechanism. An articulated hauler also pairs very nicely with a wheel loader.

Just like the wheel loader, I based this model on a real vehicle: the Volvo A35G. I chose this particular model because it matches well with the Volvo L350F, which I used as the reference for my wheel loader. The scale is the same as the wheel loader: 1:25.

I also wanted this project to use fewer parts. Only one CyberBrick module instead of two and to use just a single threaded N20 motor to lift the dump bed. This means that the only additional parts you need to buy, besides the starter kit, are the threaded N20 motor (60 mm), the 400 RPM N20, some extra wires and some hardware.

New cylinder design

I designed a new, more compact cylinder using a threaded N20 motor with a shaft length of 60 mm. The two outer cylinders are purely for scale appearance. The N20 motor is also hidden when the dump bed is retracted, which I think really improves the scale looks. Because this design uses only one functional cylinder, it is easier to assemble and more reliable.

Dumpbed

The dump bed prints as a single piece without any support material. Due to its size, it unfortunately does not fit on an A1 Mini, but you may be able to split it into two parts and glue them together afterward.

Realistic articulated steering

One of the most iconic features of an articulated hauler is its articulated steering, where the machine pivots at a central hinge rather than turning the front wheels. While my steering mechanism is not an exact replica of the real Volvo system, it performs the same function and gives the hauler its characteristic, realistic movement.

Working front LED lights

This model also features working LED lights. I have added 3 modes:

• ON (white)
• OFF

• Blinking (orange)

  

Front differential

The gearbox is simply a smaller version of the one used in the wheel loader. The articulated hauler uses only a single gearbox assembly, which means that just one N20 motor is required for driving. As a result, the hauler is driven only by the front wheels, but in my opinion it is still fast enough and has sufficient torque.

Printing

Some parts require a bit of niche support, but most can be printed without any, and the supports that are needed are easy to remove. Make sure you have sufficient bed adhesion, as some parts are quite tall. If you experience adhesion issues, please refer to the Bambulab Wiki.

The tires must be printed in TPU. I used Bambu Lab TPU 90A, but other TPU filaments should work as well.

Assembling

I’ve included an assembly guide that also contains a list of all non-printable components and a hardware connection diagram.

This model does have quite a few parts, so assembly won’t be the quickest, but the process itself is straightforward.

If you come across any mistakes or unclear points in the guide, please let me know. And if you have any questions, feel free to reach out.

Required components

Please note: if you already have the Cyberbrick Beginner’s Kit, you only need to purchase the additional parts listed in the bill of materials below.

Controller

You can use any controller you like, but I personally use the official Bambu Lab controller, which you can find here.

Updates

I have added an extra STL File with an axle for the front gearbox. This axle can be used to make the dumptruck without any electronics.

2-1-2026