![Why won't my brand new lego pneumatic pump activate the pneumatic cylinder? Did I do something wrong? : r/lego Why won't my brand new lego pneumatic pump activate the pneumatic cylinder? Did I do something wrong? : r/lego](https://preview.redd.it/why-wont-my-brand-new-lego-pneumatic-pump-activate-the-v0-1g39cr8ozz7a1.jpg?auto=webp&s=74eceeeed257aefaef0b8ab9586acc20937cf357)
Why won't my brand new lego pneumatic pump activate the pneumatic cylinder? Did I do something wrong? : r/lego
![LEGO part 2793c01 - Yellow Pneumatic Cylinder with 2 Inlets Medium (48mm) with Black Top at BrickScout LEGO part 2793c01 - Yellow Pneumatic Cylinder with 2 Inlets Medium (48mm) with Black Top at BrickScout](https://img.brickscout.com/79/6f/76/42/b8/bc/43/69/ac/31/93/c8/ff/5c/e6/d0/750x750.png)
LEGO part 2793c01 - Yellow Pneumatic Cylinder with 2 Inlets Medium (48mm) with Black Top at BrickScout
![Amazon.com: LEGO Technic 4 pcs NEW YELLOW MINI PNEUMATIC PISTON CYLINDERS Air pressure Pump pack lot set switch hose small little robot robotics : Toys & Games Amazon.com: LEGO Technic 4 pcs NEW YELLOW MINI PNEUMATIC PISTON CYLINDERS Air pressure Pump pack lot set switch hose small little robot robotics : Toys & Games](https://m.media-amazon.com/images/I/41FeCLokggL.jpg)
Amazon.com: LEGO Technic 4 pcs NEW YELLOW MINI PNEUMATIC PISTON CYLINDERS Air pressure Pump pack lot set switch hose small little robot robotics : Toys & Games
![LEGO MOC MOC - 1 Cylinder Switchless Pneumatic Engine (LPE) - 2500 RPM - Green Gecko by Green Gecko | Rebrickable - Build with LEGO LEGO MOC MOC - 1 Cylinder Switchless Pneumatic Engine (LPE) - 2500 RPM - Green Gecko by Green Gecko | Rebrickable - Build with LEGO](https://i.ytimg.com/vi/nrbE3khYYUY/maxresdefault.jpg)
LEGO MOC MOC - 1 Cylinder Switchless Pneumatic Engine (LPE) - 2500 RPM - Green Gecko by Green Gecko | Rebrickable - Build with LEGO
![LEGO Technic Pneumatic Cylinder Old 48mm with Black Piston (4 Studs Long) | Brick Owl - LEGO Marketplace LEGO Technic Pneumatic Cylinder Old 48mm with Black Piston (4 Studs Long) | Brick Owl - LEGO Marketplace](https://img.brickowl.com/files/image_cache/larger/lego-technic-pneumatic-cylinder-old-48mm-with-black-piston-4-studs-long-25-646183.jpg)
LEGO Technic Pneumatic Cylinder Old 48mm with Black Piston (4 Studs Long) | Brick Owl - LEGO Marketplace
![Three LEGO motors, 17 LEGO pneumatic cylinders and a pinch of engineering magic - The Brothers Brick | The Brothers Brick Three LEGO motors, 17 LEGO pneumatic cylinders and a pinch of engineering magic - The Brothers Brick | The Brothers Brick](https://s3-us-west-2.amazonaws.com/media.brothers-brick.com/wp-content/uploads/2018/10/Screen-Shot-2018-03-09-at-10.46.54-640x348.png)
Three LEGO motors, 17 LEGO pneumatic cylinders and a pinch of engineering magic - The Brothers Brick | The Brothers Brick
![Amazon.com: Goshfun 32Pcs 10-Kinds MOC Pneumatic Parts Bricks with Air Pump Push Rod Switch Piston Air Pipe, DIY Small Particle Stem Building Blocks Toy Set Compatible with Lego, Random Color of Air Amazon.com: Goshfun 32Pcs 10-Kinds MOC Pneumatic Parts Bricks with Air Pump Push Rod Switch Piston Air Pipe, DIY Small Particle Stem Building Blocks Toy Set Compatible with Lego, Random Color of Air](https://m.media-amazon.com/images/I/61LO-rtSR4L.jpg)