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LEGO models my own creation MOCpages toys shop 4-Wide Cat 657 Scraper on a Heavy-Duty Lowloader
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4-Wide Cat 657 Scraper on a Heavy-Duty Lowloader
An LDD model of a Cat 657 Scraper being hauled on a heavy-duty lowloader, done at a 4-wide scale (i.e. 1 stud = 2 feet).
About this creation
This LDD model is the latest addition to my series of 4-wide heavy transports and construction equipment -- a Cat 657 Wheel Tractor-Scraper riding aboard a heavy duty lowloader.

The Cat 657 is one of the real titans of the earth-moving industry, and is one of the largest and most powerful machines built by Caterpillar. It weighs in at around 80 tons empty, and over 130 tons fully loaded. The dual-engine model boasts over 1000 horsepower (a 600 HP engine in the tractor and a 450 HP engine in the scraper).

The heavy duty lowloader trailer is loosely based on some of the trailers manufactured by Harley Murray. Each axle in the trailer is actually a pair of dual axles, i.e. 8 wheels per row (each wheel in the model represents two wheels on the actual trailer -- think of the wheels in the model as super singles). A 2-axle (16-wheel) jeep trailer is used between the tractor and the low-loader to off-load the drive axles of the tractor somewhat.

If the way the scraper is sitting on the trailer looks a bit awkward, take a look at this picture. The Cat 657s are so big that few trailers are long enough to accomodate them.

This model is now part of a Cuusoo idea. Consider supporting it if you like it.















Here are some pictures of the Cat 657 Scraper all by itself. The model has at least some of the functionality of the real thing, including articulated steering, pendular front suspension, a bowl that can be raised and lowered, and an apron that can be raised and lowered. I had to make a few compromises in the contruction, though. The actuator that works is supposed to work the apron isn't really attached to it -- it is just for show. The pins that attached the bowl to the lever arms are frictionless, so the only thing that holds the bowl up is the friction between the sides of the bowl and the lever arms themselves. Finally, I was completely unable to incorporate any kind of ejector blade in the bowl -- that was simply too much detail at this scale.























Cat 657s can be operated by themselves, but they are frequently paired with other machines to aid in the loading process. Below are a pair of 657s operating in tandem in a push-pull configuration.



The final picture is a Cat 657 being push-loaded by a Cat D9 dozer.






Comments

 I made it 
  July 25, 2013
While I hadn't originally planned on it, I changed my mind and decided to submit this model (the link to the Cuusoo page is up in the description). Consider supporting it if you like it.
 I like it 
  July 23, 2013
Beautiful work.. Any chance of sharing the LDD file? I'd love to actually try and make this. Cheers Mike
 I made it 
  July 23, 2013
Quoting Karol J Nice! Very detailed machines. I think that it can be a cool set!
Thanks. As it turns out, the trailer and the scraper are only around 500 pieces combined, which would be a pretty reasonable size for a set. There are probably a few improvements that would have to be made before it could be productized, though.
 I like it 
  July 23, 2013
Nice! Very detailed machines. I think that it can be a cool set!
 I made it 
  July 23, 2013
Quoting clayton Marchetti You have an excellent eye for heavy machinery. Fantastic detail!
Thanks. They say you do your best work when you build the things you love, and who doesn't love heavy machinery? :-)
 I like it 
  July 23, 2013
You have an excellent eye for heavy machinery. Fantastic detail!
 
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LEGO models my own creation MOCpages toys shop 4-Wide Cat 657 Scraper on a Heavy-Duty Lowloader


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