LEGO Technic 42203 - Attachments

[Paul B Technic]

I am using 42203 as the base for my latest multi-function truck. I will be designing and building a range of attachments for this.

Custom Attachment: The Rubbish Loader

This is the first of my modifications / attachments for the LEGO Technic 42203 Tipping Dump Truck. As part of this attachment, I’ve removed the original tilt tray and replaced it with a fixed rear tray, allowing for a more stable and functional design. The sides have also been removed and completely redesigned to better accommodate the rubbish loader mechanism. This same mounting standard will be used for all future attachments.

Key Features:
- Bin Loader from LEGO 42167: The rubbish loader is adapted from the mechanism found in set 42167, with some modifications to improve functionality and integration with the truck.

- Opening Top: The top section can be opened to allow access to the waste compartment, making it easy to load and unload.

- Front Storage Area: A dedicated space at the front of the truck for carrying spare bins, adding to the realism and playability.

Secure Mounting System: The entire attachment slides on and off the truck’s chassis and is secured at the front using a pin, ensuring stability while allowing for easy removal and swapping with future attachments.

Next Steps:
This is just the first of my planned attachments for the 42203 truck. I’m exploring additional modifications and attachments to further enhance its versatility.
 

 

 

 

 

 

 

 

 

Video - https://paulbtechnic.blogspot.com/2025/03/lego-technic-42203-attachment-rubbish.html

Edited March 21 by Paul B Technic

[Aurorasaurus]

I'm glad to see some of the littler sets getting some attention. But maybe this thread could be a part of the larger thread for mods and improvements of this set?

[Paul B Technic]

I will be making a heap of different attachments, the set is only the base for this. 

[Paul B Technic]

LEGO Technic 42203 - Attachment - Towing Arm

 

This is my latest attachment for LEGO Technic set 42203, this is a towing arm. It connects using the same mounting points and system as my other attachments and can be easily removed as needed.

 

 

 

 

Video - https://paulbtechnic.blogspot.com/2025/03/lego-technic-42203-attachment-towing-arm.html

[Paul B Technic]

LEGO Technic 42203 - Attachment - Cherry Picker

 

This is my latest attachment for LEGO Technic set 42203, this is a Cherry Picker attachment. It connects using the same mounting points and system as my other attachments and can be easily removed as needed.

Full details can be seen in the video below.
 

 

Video - https://paulbtechnic.blogspot.com/2025/04/lego-technic-42203-attachment-cherry.html

[Paul B Technic]

LEGO Technic 42203 - Attachment - Road Roller

 

This is a new attachment for LEGO Technic set 42203, this is a road roller attachment.

This is mounted to my multi-function trailer, which will also be used for other attachments of this type going forward. The blue gear is used to control the raising and lowering of the road roller. It also features a "quick mount" system, where the grey 2L lift arm is used to easily lock this in to position.

 

 

 

 

 

 

 

https://paulbtechnic.blogspot.com/2025/04/lego-technic-42203-attachment-road.html

[Paul B Technic]

LEGO Technic 42203 - Attachment - Grader Blade

 

This is a new attachment for LEGO Technic set 42203, this is a grader blade attachment.

This is mounted to my multi-function trailer, which will also be used for other attachments of this type going forward. The blue gear is used to control the raising and lowering of the grader blade. It also features a "quick mount" system, where the grey 2L lift arm is used to easily lock this in to position.
 

 

 

 

https://paulbtechnic.blogspot.com/2025/04/lego-technic-42203-attachment-grader.html

[Paul B Technic]

LEGO Technic 42203 - Attachment - Reel Mower

 

This is a new attachment for LEGO Technic set 42203, this is a reel mower attachment. As this is pulled along, the wheels make the blades turn.

This is mounted to my multi-function trailer, which will also be used for other attachments of this type going forward. The blue gear is used to control the raising and lowering of the road roller. It also features a "quick mount" system, where the grey 2L lift arm is used to easily lock this in to position.
 

 

 

Video
https://paulbtechnic.blogspot.com/2025/04/lego-technic-42203-attachment-reel-mower.html

[roeltheworld]

I really like this thread! Its a versatile chassis with lots of options. Fun to see these little puzzles come together👍

[Paul B Technic]

Thank you. I have another attachment (well an update to a previous one, let's call it MK2) almost ready to post.

I also have a heap of ideas for other attachments, just need to break down some other sets for the parts...

[Paul B Technic]

LEGO Technic 42203 - Attachment - Rubbish Bin Loader MK2

 

This is an updated version of my rubbish bin loader attachment for the LEGO Technic 42203 Tipping Dump Truck. As part of this build, the original tilt tray has been removed and replaced with a fixed rear tray, creating a more stable and functional platform for future upgrades. The tray sides have also been completely redesigned to better accommodate the rubbish loader mechanism. This new mounting standard will be used across all future attachments for consistency and compatibility.

Key Features:
Bin Loader from LEGO 42167: Adapted from the mechanism in set 42167, the loader has been modified for smoother operation and better integration with the truck chassis.

New PTO Drive System: Control is now mounted at the front of the tray and runs centrally down the body to provide a rear Power Take-Off (PTO). This powers the lifting mechanism for the rubbish bin, which is operated using the black gear at the front of the tray.

Independent Crusher Control: A rear-mounted crusher is integrated into the rubbish bin lifting body and is controlled separately using the black gear located at the top.

Secure Mounting System: The entire attachment slides onto the truck’s chassis and is locked in place at the front with a pair of pins. This ensures stability while still allowing for quick removal and swapping with other attachments.

Next Steps:
This is just the beginning of my modular upgrade path for the 42203 truck. More attachments are in the works to expand its capabilities and transform it into a true multi-role vehicle.

 

Video - https://paulbtechnic.blogspot.com/2025/04/lego-technic-42203-attachment-rubbish.html