Posted January 24, 201213 yr Hi everyone, this is my first MOC to be posted here. It is my version of the 8258 crane truck. My version has one axle less, but has a pneumatic knuckle boom crane instead of mechanical, pneumatic outriggers and dump bed. You will recognize the cabin, as it is mostly the same as in 8258 but it is modified to house the battery box. The front part of the truck houses M motor for steering and an XL motor for driving. The IR receiver is mounted on the roof of the cabin. Behind the cabin is the crane itself. The crane is basically the one from the 8436 with the 2nd section of the boom taken from the 8258 so it can extend and has a rope with a hook. The crane is pneumatic, with the air coming from the onboard compressor. For crane operation the operater uses two pneumatic valves, a gearbox and a power switch. The valves obviously control the two rams inside the boom. The gerabox has two functions. One function is for the crane rotation, where, depending on the power switch position, the crane rotates left or right. The second function is the compressor which powers all the remaining functions of the truck. Besides the crane there is also a pneumatic dump bed. Hope you like it Edited January 24, 201213 yr by kristl
January 24, 201213 yr that truck looks awesome! i really like the pneumatic crane. Allanp will be a fan! tim
January 25, 201213 yr This is one hell of a good MOD/MOC! How did you manage to get all these functions in such a cramped space? It really looks good, keep it up!
January 25, 201213 yr Author that truck looks awesome! i really like the pneumatic crane. Allanp will be a fan! tim Thanks, I like pneumatics too, but one has to be careful when routing the hoses so they don't rub on moving parts like gears, etc. Awesome truck man,now what you need is a trailer and a digger. Thanks man And you are totally correct about the trailer. I will be building it to tow my 8455 with onboard compressor. This is one hell of a good MOD/MOC! How did you manage to get all these functions in such a cramped space? It really looks good, keep it up! I'm glad you like the truck. Well, actually there was enough space in the chassis, but everything had to be positioned in front of the rear axles, because the dump bed cylinders take all the available space between the rear wheels.
January 25, 201213 yr Nice, well done! Gonna try that technique for putting the pneumatic pistons back to back, looks clean!
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