Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗

Technic · SET 42042

Crawler Crane

A Technic crawler crane with a long lattice boom. Repeated track links, boom sections and cable routing require patience and orderly checks.

Pieces: 1,401
Release year: 2015
Theme: Technic
Set number: 42042
LEGO recommended age: 10+
Archived regional retail price · Germany: 119.99 €

Official LEGO archive Official building instructions

Archived regional retail price in the stated market and currency. It does not establish the Italian launch price; no estimated currency conversion. Brickset ↗ · Reference checked on 22 October 2026

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Official English name verified at: LEGO English archive ↗ · Checked on 26 October 2026.

TIME TO BUILD

How long does it take to build Crawler Crane?

Individual build

A starting point for planning your build. Times for each experience level are editorial estimates, not measurements submitted by HowLongToBuild users.

Editorial estimate · first build

Beginner

≈ 12 hSuggested range7 h – 19 h 15 min

Intermediate

≈ 8 hSuggested range4 h 45 min – 13 h

Experienced

≈ 5 h 30 minSuggested range3 h 15 min – 9 h

Based on one person building the set for the first time, following the original instructions and using numbered bags where supplied. Includes normal piece-finding and minor adjustments; excludes long breaks, filming, dismantling and modifications. Sources may use different methods. This range is neither a statistical interval nor a limit: your build may take less or more time.

How we estimate times · sources and method

Editorial assessment: A Technic crawler crane with a long lattice boom. Repeated track links, boom sections and cable routing require patience and orderly checks. Two black tracks support the crane's upper structure and cab. A first build following the instructions, including normal piece finding; an adult may help when needed. Breaks, subsequent play and any alternative models are excluded. For older sets, unnumbered bags or previously mixed pieces may prolong sorting. No verified timed build: indicative values with substantial variation.

Sources do not always specify the builder’s experience. The three experience bands are our editorial assessment, based on the complexity of the set and individual accounts where available.

LEGO · set-specific instructions ↗
Official name, pieces, age and imagery; no timed building data.
LEGO · set manual ↗
Document for this set number. The duration is an editorial estimate, not a LEGO timing.

Checked: 26 October 2026 · Method v1.0 · Limited reports; not a statistical average.

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BEYOND THE BRICKS

Did you know?

The model, the history, the ideas

Inside the set

A lattice boom

Blue beams form the long open structure supporting the hook.

LEGO source

A broad base

Two black tracks support the crane's upper structure and cab.

LEGO source

Beyond the set

The stories, places and inventions behind your build.

Three thousand tonnes

The real crane’s declared maximum capacity is three thousand tonnes, within specified configurations and conditions.

Read the full story

The LR 13000’s stated maximum capacity is 3,000 tonnes, not a promise for every load position. Liebherr separately lists lifting height and radius. Operation without derrick ballast still uses increased turntable ballast: it does not mean a crane with no counterweights.

Liebherr

Transported in pieces

Its transport design optimises components to four metres wide, with individual elements weighing up to seventy tonnes.

Read the full story

The crane must reach a site before working. Liebherr specifies individual transport components of no more than 70 tonnes, with ballast slabs arranged in a twenty-foot container format. The machine’s enormous working form depends on a deliberately planned division into transportable parts.

Liebherr

Expanded stories updated on 29 October 2026

Written by HowLongToBuild · Sources are linked with each story · Checked on 26 October 2026. Historical facts and story details refer to the context described.

THE COMMUNITY’S EXPERIENCE

What was it like to build?

Three separate scores from 1 to 10. For difficulty, 1 means very easy and 10 means very difficult.

No approved ratings yet. Scores are never generated by this site or inferred from the recommended age.

Building tips from the community

Specific steps, useful checks and sticking points. Contributions appear after moderation, in their original language. Do not upload instruction pages or personal contact details.

No approved tips yet.

SET THE MOOD

A soundtrack for your build

· Selected for the subject and atmosphere

Electronic pulses and open melodies provide movement without a constant action-film crescendo. They accompany landscapes and travelling vehicles through a sense of exploration.

OUR PICK

Dive

Tycho

Rhythmic and lively

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Your listening moodChoose a different soundtrack

A build to spread over several sessions: choose the more understated option when you want the instructions to take centre stage. The music does not set your pace.

Editorial suggestions, not official soundtracks for the set. External services may require an account or subscription; editions and availability can vary by country. Suggest another soundtrack →

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