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Posted

I really like it. Considering the limitations of Lego parts like linear actuators and motors, you've managed well to make the model faithful to the original R9150, which happens to be my favourite mining excavator! Granted, there are some parts which don't look as good as they could, but I think you've done well.

Nice work!

Posted

Hydraulic mining excavators are my favorite heavy machines, and while this one isn't perfect, I still like it. It has the Liebherr appearance and looks pretty good from most angles. The arm may be just a bit crude, and the front-end loader bucket doesn't look quite right, but I can live with that. It's still impressive.

Regarding the bucket direction - make no mistake, this is a backhoe-style excavator. The shovels share the same undercarriage, powertrain, cab, mainframe, etc but the entire attachment - boom, arm, bucket, and cylinders - is noticeably different on the shovels. (For example, the arm- and bucket cylinders are underneath the boom and arm, respectively, on the shovels, rather than being on top like all backhoe excavators.) The last time I checked, all of Liebherr's mining excavators were available in either configuration; if I'm not mistaken the prototype of the colossal R9800 was a backhoe-type, but they build a lot of shovels too. Komatsu also offers their entire line either way; Hitachi and O&K (now part of Cat) offer all but their biggest either way, with the biggest being a shovel. The two types are similar, sure, but still quite a bit different.

In the real world, track pad width varies according to mine conditions, so I can accept the narrow pads shown here. It's obviously not working the softer conditions of, say, the Canadian oil sands; I'm guessing it's working in heavy rock. Some of the giant electric cable shovels have pads that look downright petite - but they function.

Cab appearances can be deceiving. Some of the mining machines have walk-in cabs rather than duck-your-head cabs, and some of them are built really wide, like a mobile office. Shoot, O&K used to offer an optional amenities cab with a fidge, microwave, etc. I'm not very knowledgeable on the R9150, so I can't say much about the cab other than looks can be deceiving.

No Lego model is perfect, and this has a few flaws, but overall it's still a nice machine...

...and the big "9150" sticker definitely belongs on the counterweight as shown!

  • 4 weeks later...

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