Set Details
- Set Number
- 42009
- Name
- Mobile Crane MK II
- Theme
- Technic
- Year
- 2013
- Pieces
- 2,607
- Complexity
- Expert
- Build Time
- 8-16 hours
- Ages
- 16+
- Type
- Both play and display
About LEGO Mobile Crane MK II
LEGO Mobile Crane MK II (set #42009) is one of the larger LEGO sets, requiring dedication and space with 2,607 pieces from the Technic theme, released in 2013. The Technic line features mechanically complex models with gears, axles, and motors. At 2,607 pieces, this is a expert-level build with an estimated build time of 8-16 hours, suitable for ages 16+.
Set Highlights
- 2,607 pieces across multiple numbered bags — staged building keeps the process organized.
- Compatible with all standard LEGO sets — bricks extend naturally into other sets you own.
- Versatile build — display-worthy when complete, durable enough for active play.
Who Is This Set For?
Gift for Ages 16+
The expert difficulty makes this accessible without being trivial — a well-matched gift for LEGO fans in the 16+ age range.
Weekend Build Project
2,607 pieces with an estimated 8-16 hours fits comfortably into a focused afternoon or weekend session.
Expanding a Technic Collection
A solid addition for collectors building out their Technic shelf. Introduces parts and builds that complement other sets from the same line.
Build Tips
Open bags one numbered sequence at a time — LEGO orders them to match the build stages and keeps loose piece counts manageable.
Budget 8-16 hours across multiple sessions rather than one sitting. Fatigue leads to missed connections that are hard to trace later.
Keep the instruction booklet after building — it's the most reliable reference for disassembly, cleaning, or reassembly after storage.
Finding Instructions
With 2,607 pieces, set #42009 comes with a thick instruction booklet — often split into multiple numbered bags and build stages. The official PDF is available free on LEGO.com, or use LegoFinder's AI to find it instantly from a photo.
Mobile Crane MK II FAQ
Related Reading
More Technic Sets
See all Technic →
Also Released in 2013
All 2013 sets →Similar Build Difficulty
Sets at roughly the same piece count and complexity tier — different theme and year, but a similar build experience.
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