Answers.Body: <p>You can adjust the length (extension) of linear actuators manually in two ways:</p>
  <ul>
  <li>The same motor would do - by rotating the axle on its end.</li>
  <li>By rotating an extending shaft. Just make sure the other end is fixed, otherwise it would spin freely without doing anything.</li>
  </ul>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-28T08:46:02.093Z
Answers.LastActivityDate: 2022-12-28T08:46:02.093Z
Answers.UserDisplayName: Alex
Body: <p>I'm building the Lego set <a href="https://www.lego.com/en-us/product/app-controlled-cat-d11-bulldozer-42131" rel="nofollow noreferrer">42131 D11 bulldozer</a> and my back ripper cylinders (linear actuators) are in the complete up position and it's keeping me from completing the build.</p>
  <p>How do you get them to go down? I tried the control on my phone but it just keeps calibrating and won’t move past that screen.</p>
  
Tags: <technic><building>
Title: Lego D11 ripper cylinder
UserDisplayName: Daniel Jones
ThreadText: # Lego D11 ripper cylinder
  
  (Asked by: username_0 on 2022-12-27)
  
  I'm building the Lego set [42131 D11 bulldozer](https://www.lego.com/en-us/product/app-controlled-cat-d11-bulldozer-42131) and my back ripper cylinders (linear actuators) are in the complete up position and it's keeping me from completing the build.
  
  How do you get them to go down? I tried the control on my phone but it just keeps calibrating and won’t move past that screen.
  
  **Tags:** technic, building
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2022-12-28. Score: 2
  
  You can adjust the length (extension) of linear actuators manually in two ways:
  
  * The same motor would do - by rotating the axle on its end.
  * By rotating an extending shaft. Just make sure the other end is fixed, otherwise it would spin freely without doing anything.
  
  
  ---
  
  