LEGO 42121 Heavy Duty Excavator Building Instructions
Technic • 2021
Instruction videos
LEGO 42121 set details
LEGO 42121 Heavy Duty Excavator is a 2021 LEGO Technic set focused on the LEGO model. The details table below lists 569 pieces, along with the set number, theme and year.
About this LEGO instruction page
Watch the step-by-step LEGO instructions video for LEGO 42121 Heavy Duty Excavator. You can pause between steps, follow the build order, and use the related instruction links below to find more sets from the same theme.