My pneumatic motor pump thing just broke while making a 42080 alternative model. The model worked perfectly fine (I just finished) but when I played with it for a bit the thing
Amazon.com: LEGO Technic Forest Machine 42080 : Toys & Games
Forest Machine 42080 | Technic™ | Buy online at the Official LEGO® Shop US
Review: 42080 Forest Harvester | Brickset: LEGO set guide and database