An alternate model of the #42082 Lego Technic set, featured 4×4 drivetrain with fake engine, steering, lockable leaf suspensions, motorised outriggers, manipulator crane and two ways tipper, with openable elements and building instructions.

Context

After working two times on the #42082 Lego set (see my C model and D model), I wanted to make a break for other creations, and I did with other instructions including machines. But after some months, I discover a very nice model-C-ish of the 42082 (because of use of parts not in the set) and I found the idea very cool to make a truck. I wanted initially to make an Unimog too but the result will be too close from the “the lego technic channel” one so I changed my plan and searched for an other truck. My ideas was to look for an off-road truck which can be equipped with tools such a manipulator crane or/and a tipper. I found the Gaz Sadko which were per-fect for it with the engine nose and small cabin which looks like powerful, massive and big in scale enough to fit the functions in it.

Functions

My first C model of the 42082 has two motorised functions, my second D model has four, so this one will have more : five, with also many manual functions. Let’s started with manual functions. The first is the steering on the front axle, which is operated by the beacon on the cabin which also makes rotate the steering wheel with gearing. The model is equipped with 4×4 drive-train which drives a V8 fake engine placed under the hood, hood which can be opened, as the doors too. 

Next function is the lockable leaf spring suspensions : indeed the 42082 set is not equipped with any spring or suspension elements, so I have created with Technic axles which are bent in elastic deformation during suspension travel. To prevent the wear during a long displayed time, I equipped the suspensions with a lockable orange pinbush in order to lock them on the chassis (please push it to lock the suspensions if you display the model for a long time). Of course the travel is small and the chassis is bent too but it gives a small offroad touch to the assembly.

Next group of functions is the motorised one. All motorised functions are powered by only one motor put inside the chassis in the middle of rear assembly and distribute the power to 3 gearboxes to motorise each functions. The first group is located at the right and operates the manipulator crane with two linear actuators and a turntable. The second group of gearbox is located on the left and operates the outriggers and the tipper, both with mini linear actuator. The manipulator crane is an inspired and modified smaller version of the 8258 set, with manual extendable boom with fixed hook.

The tipper is an interesting part, it was the first time I designed a two-sides tipper with articulated dropside. I used for that a simply system with a centered actuator which raises the tipper with rollers, and movable locks for the pivot points of the tipper. Therefore, either the tipper is dumped at the rear by unlock the side lock and lock the rear one, and dump at the side by locking the side lock and unclock the rear one.

The model is not equipped with a front or boom winch because I ran out of room and gearing to make a proper irreversible gearing. It was also impossible to pass the string inside the turntable because of the gearing for a boom winch. Last things about manual functionality : two pads for the outriggers are located in the right side in a lockable box, and an other compartment can be open at the left to reveal two toolboxes. You can see the internal mechanism exposed here :

Design

Regarding the design, I am very happy with the result. I think this is as important than the functions, and as the red inventory was limited on this set, I have started to build the manipulator crane and the cabin to validate the design and what were possible to do, then I made the chassis and the functions. I am pretty satisfied with the overall shape of the truck and the homogeneity and powerness of its look. I have tried to make it as powerful as it was possible with iconic elements such the front grill, bumper, mudguard, side ladder and other details (engine, beacon, lights, detailed interior etc.). But I wanted also to keep the roundness of old Russian truck like the Gaz to look less bulky, that is why I have used curved panel on the cabin and the nose, and bionicle tooth to round the different corner (hood and mudguard), and as usual, it is better in Lego to caricaturise a bit more to have a proper look of the model.

Pictures and Video

Building Instructions

Of course as it is an alternate model, I had to make the building instructions, and what an instructions ! 687 pages for 2697 parts, the record of the Kumihimo is beaten ! Therefore this is the biggest instructions I have ever done. As usual, the instructions are step by step high resolution computer generated instructions with partlist in the same way as official Lego one.

Regarding the bill of material, as an alternate model, if you own the #42082 Lego set, you have all the needed parts. But you can checked the exact bill of material on Rebrickable and export in whatever format you want :

Want to know if you can build the 42082 Model E – Offroad Truck ? The model has been indexed to rebrickable, check it !

You can buy the instructions with the following button for 15€. You can also buy in a bundle pack including building instructions for my 42082 C model and/or D model and get a discount (15% off for 2 PDF, and 20% off for 3 PDF).

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Changelog :

• 25/04/20 : Correction on the left leaf spring suspension page 65
• 30/04/20 : Correction on the hole used for fixed the linear actuator on the tipper lever, page 302.