8258 Crane Truck

8258 Crane Truck is a TECHNIC set released in 2009. It builds into a large, four axle cab-over semi tractor with a crane and fifth wheel. It contains 1877 pieces and is the third largest TECHNIC set piecewise (the largest set is 8110 Mercedes-Benz Unimog U 400). It includes a Power Function's battery box, an XL-motor and a Power Function's switch.
== Notes ==
* The assembly instructions are on 4 booklets, for a total of 187 steps, each of them made by up to 22 sub-steps...
* There are four motorized functions: one to extract the supports, three for the crane movements (rotation and two elevations). The several functions are all based on the same unique motor, with mechanical gears to switch to the right effect. This makes the internal structure extremely complex and justify the huge amount of pieces.
* One part is fully in rubber, to ensure the flexibility of the blocking part of the wire holder. It is one of the only non-plastic parts. The other non-plastic part is the hook part made fully in metal, to ensure enough weight and therefore a better stability of the hook.
8258-details12.jpg|metallic hook
8258-details11.jpg|rubber part
8258-details8.jpg|Blocking mechanism where the rubber part is used
8258-flexpart.jpg|rubber part
* The front steering wheels are four and have a different steering mechanism for each pair: the two front wheel turn more than the other two, taking in account the steering dynamic.
8258-details4.jpg|the two pairs of steering wheels have different steering mechanisms
8258-details16.jpg
* This set has two "pistons" that are in fact screws transforming a rotational movement into a linear one, making the piston moving slowly but strongly.
8258-details7.jpg
8258-details17.jpg
8258-pistons.jpg
* One fascinating part is the transmission between the truck and the crane: three movements are controlled by several rings, as shown below:
8258-details-transmission.jpg|transmission of movement to the crane
crane-transmission.jpg
8258-details18.jpg
crane-8258.jpg
== LEGO.com Description ==
== Gallery ==
82581.jpg
8258-stickers.jpg|stickers
8258-box.jpg|box
8258-box-in.jpg|box inside
last-page-instr-8258.jpg|last of the 187 construction steps
manuals-8258.jpg|four manuals for the assembly instructions
8258-details15.jpg
8258-details13.jpg
8258-details10.jpg
8258-details6.jpg
8258-details3.jpg
8258-details1.jpg
8258-details14.jpg
8258-details9.jpg
8258-details5.jpg
8258-details2.jpg
crane-8258.jpg|crane part
8258-details19.jpg|battery pack
8258-folded-back-view.jpg
8258-folded-full.jpg
== External Links ==
Category:TECHNIC
Category:8000 sets
Category:2009 sets
Category:Trucks