What functions does the Mobile Crane MK II have?

The boom extends and lifts via a hand crank, and fold-out outriggers add stability, all without a motor.

How many pieces does the set have?

2,607 pieces with 167 different elements, mostly in black, light bluish grey, blue and yellow.

Who is this set suited for?

Experienced Technic builders looking for a larger, function-rich model without an electric motor.

Technic

Mobile Crane MK II

The Mobile Crane MK II (42009) is one of the largest LEGO Technic models from 2013, recreating a mobile crane truck with an extending boom. Built from 2,607 pieces, it's a fully mechanical model with several working functions and no motor at all. The full parts list with every colour is further down this page.

Set number: 42009
Year: 2013
Pieces: 2,607
Minifigures: 0
Theme: Technic
Different parts: 167

What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 167

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Spare parts (18)

These extra parts come with the set in case one gets lost.

Description

A crane truck with real mechanics

The model recreates a multi-axle mobile crane, with a boom that extends and lifts via a hand crank while fold-out outriggers add stability once the arm is extended. Unlike many large Technic sets, the Mobile Crane MK II runs entirely without an electric motor: every function is driven by hand through gears, cranks and linkages. That makes the mechanics directly tangible and shows how a real crane transfers force through its gearing. Opening up the bodywork also reveals part of the internal gear trains that carry that force through the model.

Over 2,600 pieces, mostly Technic staples

At 2,607 pieces, the set ranks among the larger Technic models of its time, built from 167 different elements. That relatively low element variety against a high total piece count is typical for Technic: connectors, axles and pins repeat frequently, while specialist parts are reserved for gearing and joints. Anyone hunting for specific Technic elements will find a full breakdown in the parts list on this page, including how many of each part the model uses.

Technic's classic black, grey, blue and yellow

Black and light bluish grey form the structural base, joined by blue for the bodywork and yellow as the classic construction-vehicle accent. That combination is a Technic staple for working vehicles and makes the crane read as a piece of heavy machinery even from a distance. The parts list further down this page shows exactly how the colours are distributed across the build, section by section.

Built for experienced Technic fans

With over 2,600 pieces and genuinely complex mechanics, the Mobile Crane MK II is clearly aimed at experienced Technic builders with time for a multi-stage project. Working features such as the extending boom, rotating turntable and outriggers keep the finished model engaging well after the build, since the functions are actually usable rather than just for show. For collectors of Technic construction vehicles, it's a particularly function-rich model from 2013 that still rewards a closer look years later.

FAQ

What functions does the Mobile Crane MK II have?: The boom extends and lifts via a hand crank, and fold-out outriggers add stability, all without a motor.
How many pieces does the set have?: 2,607 pieces with 167 different elements, mostly in black, light bluish grey, blue and yellow.
Who is this set suited for?: Experienced Technic builders looking for a larger, function-rich model without an electric motor.