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Designer_Han

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    Dump Truck 10x4

    created by Designer_Han on 2012.04.24

    Main Section
    In the Netherlands, 5 axle dump trucks (Ginaf, MAN, Mercedes, Scania, Terberg) with a loading capacity of ~25m3 (~ 30 ton) are frequently seen because the Gross Vehicle Weight (GVW) in the Netherlands is 50.000 kg.

    Although not equipped with many technic functions, I decided to rebuild one in Technic Lego® because it are impressive vehicles.

    The model has the following technic functions:
    * 5 axle truck, first 3 axles steered
    * Turning cycle correction for 2nd and 3rd axle (with gears)
    * 3rd axle can be lifted (pneumatic) and has an 'auto-center' mechanism
    * Working V8 engine, including fan
    * differential unit on 4th and 5th axle, interconnected
    * Pneumatic tipping of tipping bed, consisting of 4 cylinders (2 in parallel)
    * Headlights equipped with Power Functions LED's
    * Different pneumatic circuits for 3rd axle lift and tipping

    Non-technic functions are:
    * Cabin doors open & close
    * Cabin can be opened for engine access
    * Raise-able wind deflector
    * Towbar

    Details applied:
    * Dashboard with coffee machine and coffee cups
    * Fuel tanks, air compressors and air filter units between the wheels
    * Fire extinguisher, exhaust pipe
    * Spotlights, flashlights, horns and airco-unit on cabin roof

    The dimensions of the 'Dump Truck 10x4' model are:
    * Length: 53 cm (66 studs)
    * Width: 14,5 cm (18 studs)
    * 3rd axle lift: 1 cm
    * Tipping angle: 45 degrees
    * Weight: 2,8 kg (including batteries)

    * Number of parts: 2454

    Added Section 1

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    Tipping: Ability to tip the '45-studs tipping bed' with significant load (duplo bricks). The tipping is achieved by the usage of a parallel double pneumatic cylinder configuration.

    Added Section 2

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    3rd Axle lift: Although the 3rd axle is steered, it should be disabled from the steering mechanism when lifted. As well, an ' auto center' function was necessary to assure that the 3rd axle always will be always locked in 'straight forward' position when lifted, even when the 3rd axle wheels are not in 'straight forward' position when the lift is started. Both functions are realized.

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    Working V8 engine, including fan. PF LED's headlights (see wiring in-parallel of V8 engine)

    Added Section 4

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