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Building the Lego Technic Compact Tracked Loader

I loved Lego as kid, it’s one of the primary reasons I’m a mechanical engineer.  The Technic line really ignited a mechanical interest in me and I have many fond memories of assembling complicated sets in record time on Christmas Day.  My interest in Lego took a nose dive sometime early in high school.

It’s been over 10 years since I’ve touched a Lego, let alone purchase a set.  I thought it would be interesting (and fun) to build a Lego set as a grown-ass man.  I figured it would be a fun exercise for the blog now that I have a different perspective on things as an actual engineer.  I thought that was a pretty good excuse to purchase something I saw a children’s toy.

I took a few minutes looking at the selection on Amazon and settled on a Technic Tracked Loader (set 42032) that looked interesting and wasn’t too expensive.  Two days later the set was on my desk and ready to go.

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Here are my reflections on building a Lego set as an adult engineer:

  • The box does a very nice job of selling the product.  Premium glossy packaging!
  • I forgot about the 2-sets-in-1 bonus of the Technic line, they include a second set of instructions to build something different with the same parts.
  • Weren’t these boxes noisier?  I remember a distinct Lego rattling sound from my childhood that only comes from unopened Lego boxes
  • Box is jammed full of stuff, that may have dampened the noise
  • What is this red thing? They changed the color on a lot of the smaller connector pieces to make them easier to identify and differentiate.  There are unique parts with red, blue, and tan colors that I remember as only being black.
  • What are these shafts with end stops?  That doesn’t seem convenient, this is definitely a new part.
  • These instructions are still excellent.  Very clear steps for assembly sequences with no written descriptions!
  • Assembling a set is really about the journey.  The picture on the box tells me where I’m going but I have no idea where I started from.  It’s interesting to start with a tiny piece of the machine with no context and then build out from there.
  • These 1:1 scales on the page for measuring shaft lengths are great.  I think these existed back in the day but I can’t remember.
  • Building these sets from the instructions was always a lot of fun but a completely different kind of fun than the creative building when using the same pieces.  Interesting the same set can really exercise both halves of your brain.
  • Lego taught me what a subassembly is before I knew anything about assemblies
  • These tracks are very tedious to assemble
  • Done!  Took about 90 minutes.

The tracker loader is pretty neat.  It uses a worm gear in the back to lift the bucket and two four bar linkages to actuate the bucket tilt and front jaw piece.

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Building the set was fun and a nice burst of nostalgia but it’s not something I need to do again soon.  I thought it was a little tedious towards the end and I was slightly underwhelmed with the finished loader.  I am looking forward to tearing this thing apart and messing around with the pieces though!