Mobile Crane

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For years I've been receiving requests for instructions for my largest and most complex model, the Demag AC-50 All Terrain Crane. The original model used some modified and custom parts, so bringing these instructions to life with parts that everyone has access to has been a huge task.

Finally, through the combined efforts of Chase Horman, Richard Brown, Eric "Blakbird" Albrecht and myself, the crane has been updated to use modern lego parts and the Power Functions I/R receivers for control. Features are as follows;

  • 7-9V motors
  • 4-PF IR Receivers
  • 1 set of PF LED lights
  • 3-9V battery boxes
  • 2-rear axles motorized with a pair of 9V motors
  • Middle axle independently suspended with rubber bands
  • Front axle pendular with motorized steering
  • 4-Motorized, self-synchronizing outriggers
  • Motorized boom luffing with Firgelli actuator
  • Motorized boom extension (2 stage)
  • Motorized cable drum
  • Motorized 360 degree slew





The only unofficial parts are the lego compatilble Firgelli Linear Actuator and NXT to Power Functions cable that can be bought here and here.

I hope you enjoy building this model as much as I did!

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MOC-1636

Name Mobile Crane
Designer endorka
Designed 2002
Inventory 2983 parts
Theme Technic
Old Trafford

11 COMMENTS

  • 3 months, 1 week ago vicmoc164 Level 9 MOC Designer
    looks amazing good job, maybe consider using sprung suspension instead of rubber bands, it generally improves the system and makes for better suspension. cheers, vic.
  • 1 year, 1 month ago Josef Level 4
    Hi there,

    I'am building this crane  right now...
    Cassis is done :)
    - Until now, ...instructions need improvement...
    - Second axle several improvements made.
    What I think?
    ...Think I need a vacation, if not soon a shrink...

    Regards,
    Jos
  • 3 years, 7 months ago TobyMac Level 32 Inventory Admin ADMIN
    Suggestion that came in by the submit change form:

    Hi should 87552 panel be white rather than clear?
    Also there is a white size 2 elastic shown on the stearing drive. I used an extra red size 4 as size 3 won't fit. Maybe subtract one white and add another red?

    Aidan
    • 2 years, 3 months ago endorka Level 11 Designed this MOC
      Well spotted Aidan, thank you. I've changed the panel colour to white.

      Sometimes I stretched the components beyond the limits of official Lego models, and I wonder if this was the case with the white elastic belt, to get extra traction as the steering could be quite heavy? Jennifer
  • 3 years, 7 months ago thea Level 28 Inventory Admin ADMIN
    The following question was submitted as a change to inventory.

    Hi should 87552 panel be white rather than clear? Also there is a white size 2 elastic shown on the stearing drive. I used an extra red size 4 as size 3 won't fit. Maybe subtract one white and add another red?
    • 2 years, 3 months ago endorka Level 11 Designed this MOC
      I've replied to a similar question above, thanks! Jennifer
  • 3 years, 10 months ago Josef Level 4
    <deleted>
    • 2 years, 10 months ago inv_bricks Level 8
      Did you ever get the actuator? If so, which model # was it? The links above are broken, and there are a quite a few different models on their website.
  • 4 years, 7 months ago Uko Level 3
    Great MOC, will be my next project.
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