42121 Heavy Duty Excavator

42121 Heavy Duty Excavator is a TECHNIC set that was released on March 1, 2021. 
==Background==
Excavators are heavy construction equipment consisting of a boom, dipper (or stick), bucket and cab on a rotating platform known as the "house". The house sits atop an undercarriage with tracks or wheels. They are a natural progression from the steam shovels and often mistakenly called power shovels.[citation needed] All movement and functions of a hydraulic excavator are accomplished through the use of hydraulic fluid, with hydraulic cylinders and hydraulic motors. Due to the linear actuation of hydraulic cylinders, their mode of operation is fundamentally different from cable-operated excavators which use winches and steel ropes to accomplish the movements.
==LEGO.com Description==
==Gallery==
42121b.jpg|Box reverse
42121c.jpg|Set overview
42121d.jpg|Promotional photo
==External Links==
Category:Technic
Category:2021 sets
Category:40000 sets
Category:42000 sets
Category:Construction
Category:TECHNIC sets listed for ages 8+
Category:TECHNIC sets with 500 to 699 pieces