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4WD Test Platform
Small Semi truck
Sport Car
Tow truck
Medium crane truck #1
Medium crane truck #2
Flatbed truck
Large crane truck #1
Large crane truck #2
Car transporter
HEMTT / LVS
Steering/Driving concepts
Hook Lift truck
Side Loader
Small crane truck
Bulldozer
Clicking on thumbnails
links to a bigger picture (100k average).

Second 4 axle crane truck.

I started this model end of the year 2000. This one was supposed to be more realistic (in the way it operates) and nicer looking than previous attempts at a mid-size crane truck.

This crane uses ropes and pulleys to raise/lower the boom. The boom operation is powered by two motors, same for the hook operation. Driving/sterring is done manually. Two motors to raise/lower the stabilizer legs, and a motor to rotate the turntable.

basic chassis The base chassis. Stabilizer legs assembly and turntable motor can be seen (between the 2 rear axles).
motors view The gearbox mechanism of the space shuttle is located in front of the rear axles. Each of the four gears actually links to a stabilizer leg, so they operate independently.
chassis view This shows the length of the boom for travel mode. On top of the front stabilizer legs, you can see the two motors going into the gearbox.
travel view The finished model. The air tanks on the side are for looks only. The rearmost axle is countersteered.
arrival view Top view of the crane truck and the accompanying trailer to carry the boom sections. Here the trailer is pulled by a heavy-duty pickup truck.
start setup Stabilizers down; line up the boom with the trailer, and attach sections with cross pins.
turret setup Notice the yellow string hanging on the side; it attaches to the last section of the boom, to give better leverage.
attach boom Attaching boom section 2. You can see the axles (8 long) to secure the sections.
boom done Attaching last section. You can see the string now attached. Now for the fun part: lifting the whole boom.
standing boom My four year old daughter standing under the five feet tall boom.
turret detail The yellow lever on the side switches the output of the motors between the boom and the hook operation (only one operates at a time).
turret back The two blue technic bricks click in a cog wheel and prevent the boom and hook from falling down when they are not conected to the motors.
top view Top view shows the overhang of the turret. I have a few more pictures below.
truck side view back view
front view angle view

 

E-mail me: ogerou@hotmail.com

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Last modified February 13th 2001. - Everything here is copyright Olivier Gerouville.