At 4057 parts, 42082 Rough Terrain Crane sits as the Technic set with the most number of parts.
Cranes have featured in the Technic range from 1978 when 855 Mobile Crane was released in the second wave of Technical sets.
Read on as I review the first half of building this latest Technic mobile crane model. Part 2 will be posted tomorrow.
As would be expected for a Technic set that breaks the record for the most number of parts, the box is huge.
The front of the box has the crane working in the rough terrain of a building site and there are sections of a prefabricated building being assembled.
The dimensions of the completed set are shown on the right-hand side and indicate that the boom, when fully extended, reaches 100 cm (39.4 inches).
This set includes Power Functions.
The rear of the box shows the play features of the set as well as some images of the B-model, a Pile Driver. The B -model uses the same chassis as the main model.
The box flap opens to show another image of the Rough Terrain Crane. Again, you get a sense of the extreme size of the completed model.
Instructions and sticker sheet
The instructions have been split into two bound books and come in a plastic bag that also protects the sticker sheet.
There is a large sticker sheet.
The build - Book 1
There are eight bags, for building steps 1 to 4, in a smaller, plain white box. A further five loose bags, numbered from 5 to 8, are needed for the building steps of Book 1.
Build Step 1
Building step 1 assembles the two gearboxes of the chassis. From the earliest stages it is difficult to see how this will all fit together.
The drive input to the chassis comes through this series of bevelled gears. In this view, the subassembly is upside down.
Build Step 2
By the time that building step 2 is completed the basic form of the chassis is taking shape.
The Rough Terrain Crane employs four-wheel steering and so both axles have a rack and pinion steering system. It is important that at building step 205 (page 103) the wheel hubs are aligned straight and that the two steering cross axles are upright (like an upright cross) when the green coloured-coded axle is married with the main assembly.
This alignment is correctly indicated at building step 268 (page 128) when the orange colour-coded axle is married to the chassis but if the green axle was not aligned correctly earlier in the build then the two driving axels will not be aligned with each other.
The thin white line in the image below shows how the steering system bypasses the main slewing turntable.
Build Step 3
Build step 3 assembles the outriggers. In order to have all four outriggers synchronised, all four small linear actuators need to be extended by the same amount as the outriggers are assembled. There are 1:1 scale pictures in the instructions as the linear actuators appear in the building steps.
If the linear actuators differ in length slightly when assembled then they will auto-adjust themselves to the same length using the built in clutch inside the actuator itself when the outriggers are first extended or retracted.
Build Step 4
Build step 4 assembles the rear bumper and the V8 engine and completes the parts found in the plain white box.
The orange cooling fan (saw blade) has not been seen in many sets in this colour.
For build steps 5 to 8, there are five numbered bags that were loose in the big box.
Build Step 5
Build step 5 assembles the front bumper and the crane's slew ring.
The slew ring is made using 11x11 circle gear racks in black for the first time. This is the only new part, in a new colour, in this set. There are eight black 11x11 circle gear racks.
There is an ingenious roller bearing race incorporated into the slew ring.
The slew ring fully assembled.
Build Step 7
Build steps 7 assembles the two lockers and access ladders under the turntable as well as adding the gear selectors for the chassis' two Power Functions options: turntable and outriggers.
The left locker will eventually house the tool box.
The right locker is open and will eventually house some lifting chains.
Build Step 8
The final build step for Book 1 is step 8. This sees the four mudguards and wheels added to the chassis.
The four wheels have been added which have a clever use of round 1x1 black tiles to represent the nuts holding the rims onto hubs.
At this stage, the four outriggers are not touching the ground when fully extended.
Overall opinion - so far
One thing I noticed while building this model was that having the parts separated into numbered bags made the building process so-much easier. I normally need a large dining-room table to sort and spread out all the parts for these larger Technic sets.
For this build, I was able to just open the required bags and start building. I didn't need to sort any of the parts smaller groupings and this made the building process so much easier.
Using numbered bags is an easy way of ensuring that mistakes are spotted earlier as if any significant part remains, it must have been missed out during this building stage. There were some stages where there were no spare parts remaining on completion of that step.
The part that I noticed was used more than ever before was the Technic pin connector hub with 1 pin with Friction Ridges Lengthwise. There are 84 of these parts in this set and most of them appear in the first half of the build.
This part has been used extensively for multi- directional reinforcing. I can see variants of this part appearing in Technic set in the near future.
Part 2 - Book 2
Part 2 of the review of the 42082 Rough Terrain Crane can be seen here. It looks at assembling the crane superstructure and takes an overall look at the completed model.