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8421 Mobile Crane is a TECHNIC set released in 2005 as part of the TECHNIC line. With 1884 pieces, it is the second-largest TECHNIC set pieceswise, with the new 8110 Mercedes-Benz Unimog U 400 having 2049 pieces. It builds into a large, yellow, crane truck with both pneumatics and motorization to work the boom and winch. It includes instructions for the alternate model, which is a cool bucket truck. It's recommended for children aged 11 through to 16. Description This is a description taken from Do not modify it. (visit this item's product page)

The ultimate construction vehicle!

The Mobile Crane towers above the construction site! This huge, detailed set features six-wheel steering, a telescoping boom that extends to twice its original length, pneumatic cylinders to raise and lower the boom, four retractable outriggers, motor and battery box. Authentic model for skilled builders!

  • Includes motor and battery box to extend arm and lower hook!
  • Measures over 18 inches/46 cm long!
  • Pneumatic cylinder and air pump lift crane arm - release air pressure to lower boom.
  • Arm extends over 25 inches/64 cm long!
  • Boom rotates a full 360 degrees!
  • Includes instructions to rebuild into an Aerial Lift!
  • Realistic 6-wheel steering! Wheels drive pistons in V6 engine!
  • Requires 6 AA (1.5v) batteries, not included.


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