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I'm back with another ambitious project. The Bobcat Toolcat 5600. I can't remember where I first seen it, but thought it was cool and (to me) practical. So I then searched online and came across System and minifig scale builds.

Then I found this build thread on here of a larger PF version. So I set off getting info, working on a plan, and laying down ideas.

I wanted to give this build manual functions with pneumatics. I had a hard time getting the scale of the vehicle dialed in as I had some trouble finding good side pics and the right Lego tire. However, as I kept gathering details, I found what the tire size it has and which Lego wheel was closest to a usable scale. I find that a scale of 1:8.4 worked perfect with the 81.6 x 38 (it was just a little wide, but worked fine). 

Here is the item its self:

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The real Toolcat has many variations. Solid axles or independent, closed lift arm or split tubes, turbo or not, and so on. The one I used has solid axles, closed lift arm, and an easier engine setup.

My build has many functions that tested my mental limits:

  • All-Wheel-Drive
  • All-Wheel Steering
  • Working Suspension
  • Pneumatic Functions
  • Dumping Bed and Tail Gate
  • Front Pneumatic Accessory Hookup

On to the building!

Starting with the frame for all the bits and bobs to attach to. Trying to find an image of the chassis proved to be pointless, so I did my best guess from regular pictures.

This is the first try. It rebuilt it about four times.

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Engine placement for now. The version of the real one has a four cylinder engine that powers a hydraulic pump. The real one also has hydraulic drive, but that's not for Lego yet.

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Forgot to snap some pics of the progress, but this is the second build of the chassis/frame. I had to reduce the engine to 3 cylinders to allow for a drive system.

The steering changed after this build as I needed to redo the way it was fixed to the frame.

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The design of the axle.

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The frame from the bottom. (It changes some in the final)

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The first layout of the cab... It was the second hardest part... Laying the pneumatic tubes was way to hard having mostly short pieces.

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One of the early drafts of the cab.

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I was at a crossroads by not having enough #3 connectors, running out of white parts, not having enough black 5L/7L beams or 3x7 panels, and no tan technic parts. 

So I redesigned the door and found that the ribbed hosed worked great.

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That's the bulk of the build process, the rest was fine tweaks, subtle add-ons, and fighting with Pneumatic hoses.

So here is the final product:

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There are plenty more pictures here!

Thank you for your time.

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Nice and clean build, all functionality included. Great!

Those squarish tyres would have fitted best.

And maybe nice rear fender is missing, but that just small thing.

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8 hours ago, Jurss said:

Those squarish tyres would have fitted best.

Which tires are those?

8 hours ago, Jurss said:

And maybe nice rear fender is missing, but that just small thing.

I wanted too, but on one side It would be harder to attach it to the frame.

1 hour ago, Bartybum said:

Very nice, would be interested in a video :grin:

Thank you. I might make one in the next week or so.

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On 9/28/2022 at 8:02 AM, Bartybum said:

Very nice, would be interested in a video :grin:

Sorry it took longer to get around to it. But here is the video.

 

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23 hours ago, weavil said:

Sorry it took longer to get around to it. But here is the video.

Excellent, very nice!

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Thank you. I should have hooked up the air compressor to it so I wouldn't need to pump so much and the functions would work quicker.

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