Crane truck, rotatable wheels and boom (small size requires no supports, no hardware needed)

This is a crane truck using 3rd generation optimized printed springs, no hardware needed, the boom can rotate (with some damping), and the outriggers can be retracted It has many parts to install!! (some force is required during installation, and the 1.5x larger version requires more force)

2025.7.14 Update: (preview images, description updated)

1. The original cargo box fixing method was not very secure, now changed to buckle fixing, the appearance may be slightly worse!! (detachable, just print the print profile in the red circle below)

2. The tailgate buckle has been adjusted and is more secure than before!!

3. The axle has been changed to the 3rd generation optimized detachable printed spring!!

4. The appearance has been slightly adjusted, the outriggers are easier to pull out!!

The GIF below is the assembly diagram:

1.Install the red parts first!! Install the red parts first!! otherwise it cannot be installed

2.The cargo box buckles must be placed vertically for easier installation!!

3. Then install other parts

4.To remove the cargo box buckle, you need to print the "for removing cargo box buckle" print profile separately

The green parts in the image below are the 1.5x supports to be removed, if the smaller version collapses, please add supports yourself!!

Note: 1. Both PLA and PETG can be printed. It's best to understand the characteristics of these two materials before printing to avoid printing failures!! For example, PLA can become brittle if left for a long time or at low temperatures, while PETG has good toughness. Please choose the filament that suits you!!

        2. If it's for younger children, and the parts are small and easy to disassemble, it's better to glue them firmly with 502 or other adhesives to prevent them from being swallowed!!

        3. If there are no special requirements, please do not use your own advanced process settings for printing~ to avoid printing failures!!

If your printd part has local spaghetti, or the filament doesn't stick to the build plate, please recall if you touched that area (hands secrete sweat and oil, touching it has a very high chance of causing spaghetti)  or if the build plate is dirty. The solution is to search online for how to clean a 3D print plate!! If other problems occur, please describe it in the comments section and add pictures, so it's easier for us to solve it~  Otherwise, I can't imagine the situation = =!!