Hi Eurobrickers!

This is my first time participating in an EB-contest. 

It all started by simply lurking around all the great MOCs here in the last few weeks, then I began to tinker around with a rear axle which was suitable for the 49.5x20 wheels, which I hadn't used appropiately - up to now!

I did a lot of hook-lift trucks in the last years. However, I always based them on the Arocs-sized wheels (62.4 x 20).

 

The "Fire department all road / off road truck by steph77 [TC27] Fire department all road / off road truck - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums was a strong inspiration for me. I modified the virtual pivot mechanism for a long Linear Actuator so that it's range is used in full extend, and the forces are minimized. It was this MOC which led my view on the ingenious double-action locking mechanism of 8052, which I modified as well.

From the first attempts with the rear axle to the last funtion (opening tailgate), this MOC took only 100 hours to be completed.

 

So, here it is: The purple hook-lift truck  (nearly two sets of 42069 had to be slaughtered for it    ;-)  )

 

All functions are operated manually: 

• There are four black gears on the top of the cabin:

1. 20 tooth gear, front: steering: front axle + rear axle (if not lifted; otherwise locked in midlle posistion) + steering wheel)
2. 12 tooth gear, left: liftable rear axle
3. 12 tooth gear, right: extractable rear bumper
4.  12 tooth gear, middle: long Linear Actuator

 

• The red lever on the left side is for mode switching (hook-lift or dumping).
• The black 12 tooth gear at the front of the container controls the opening tailgate.

 

• The three beacons (two on top of the cabin and one at the rear) rotate while driving. Generally, this is my favourite function which I do ever since I built MOCs within the last 35 years. Almost every MOC of mine has rotating warning lights  :-) 
• The fake engine (V 6) works while driving.
• Front PTO (right above the licence plate)

 

Overall view:

 

 

 

Steering is done by the black 20 tooth gear (HoG) on top of the cabin. The steering wheel in the cabin rotates.

 

The rear axle steers (counterwise, of course) or is locked when having been lifted, respectively:

 

 

 

Rear axle can be lifted (by worm gear with dbg 8 tooth gear) - operated by black 12 tooth gear on the top of the cabin, left side:

 

The rear bumper can be extracted (which usually is done when the container is transported on the truck) - operated by black 12 tooth gear on top of the cabin, right side, which drives another 12 tooth gear at the bottom of the vehicle; this gear in turn moves an old 8 L gear rack (see images above).

 

 

Hook-lift mode:

 

Dumping mode:

The long LA is operated by black 12 tooth gear on top of the cabin, middle position.

 

Switching between the two modes is done by the red lever (color coding: red lever - red bushes)

 

There is a little cut-out in the container to see the switching mechanism (red bushes) (heavily inspired by 8052):

Brickshelf Gallery - 20240829_183357.jpg

 

The rear tailgate of the container can be opened (by worm gear with 8 tooth gear) - operated by black 12 tooth gear at the front of the container:

 

Front beacons rotate while driving - as well as the fake engine (V 6) underneath the drivers' seats and the front PTO:

 

Rear beacon rotates while driving:

 

 

Some bottom views:

 

 

 

 

You can find all the images on brickshelf.com:  Brickshelf Gallery - for Eurobricks contest TC 27

 

 

Feel free to comment!

 

 

Edited September 1, 2024Sep 1 by Timewhatistime

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