[MOC] Liebherr LR 636 G8

[Bricksley]

Hello :)

This time the choice fell on a modern tracked loader. And that the choice of producers was dim, I did not think for a long time and fell on Liebherr LR 636 G8. G8 simply means the eighth - latest - generation (2020-2023), which has a significantly different look compared to previous generations, this time we focus on sharp lines, triangles, shapes in line with current trends in the design of heavy machines :) construction, I regretted several times that I didn't choose the rounding of the seventh generation ;)

As in my Dressta dozer here, scale 1:18 and new electrics. Model is full motorized, 4x PU L motors (drive, arm & bucket) connected to 2x PU Hubs and controlled by 2x PU Remote Control units.

Undercarriage: drive through planetary hubs, no suspension - well almost, because it was built as such and is in the model. Unfortunately, as a result of weight gain, it turned out that all elements on which the traction frames can be hung have larger slack, which definitely go beyond acceptance, resulting in a small crossover of the track frames, hence at some point they were rigidly fastened - at least the appearance stayed ;)

Arm and bucket: due to the original assumptions about the suspension, it turned out that there was almost nothing left space for the mechanisms, but in the pain I managed to cram the drive into the actuators, new gears z12, z20, connectors and a new liftarm 3x5 helped :D The geometry of the arm is very correct - yes, in fact, in the tracked loader, the bucket is raised low (just the specificity of these machines). My only regret is on the bucket, it should definitely be as wide as the width of the machine. Unfortunately, the old 18s is a bit too narrow (finally used it), the new one is definitely too big, there was also a construction option (which I had an idea for, but was effectively knocked out of my head) - just not suitable for a MOC and operation with beans ;)

The rest of the model is the appearance and the fight for more or less details - I leave the assessment to You :)

 

 

 

All photos: https://www.flickr.com/photos/97083384@N04/albums/72177720310147664

 

 

Movie:

Compare with my Dressta dozer - too 1:18 scale.

 

 

[Milan]

Saw it online today. Incredible model.
Frontpaged.

[2GodBDGlory]

Looks amazing! Model Team style construction equipment always impresses me a lot.

That's an interesting choice to use two PU train battery boxes instead of a Technic hub. Was that done to allow for simpler remote control without a phone go-between?

[Jurss]

Detail level is incredible.

Somehow bucket looked too small, but then looked on original, and it is not too small.

[gyenesvi]

Wow, very nice build and smooth functioning, I like the simple layout of the control electronics and routing of the control pathways! Cool way of using two controllers together.

6 hours ago, 2GodBDGlory said:

That's an interesting choice to use two PU train battery boxes instead of a Technic hub. Was that done to allow for simpler remote control without a phone go-between?

I also had the same question in mind, but if I look at the build, I'd also guess that the two smaller hubs were actually a better fit space-wise for the shape than the one large hub would have been..?

[Skylark90]

Great model! I hope to see it next year at the Brick Creek site of LUGPOL yearly exhibition ;) And these two PU small hubs - very clever! The visual side is top of the top, I wish I could build like this :) Congratulations!

[eric trax]

It's amazing how beautiful a model can be built from bricks. It's incredibly realistic. The liebherr color scheme works in plus here. The white cabin makes the model much more pretty than the completely yellow machines.

It works very well and that's about it. Congrats!

[Jundis]

Brilliant model....!

[Toastie]

20 hours ago, 2GodBDGlory said:

That's an interesting choice to use two PU train battery boxes instead of a Technic hub.

Could be; or maybe the Technic hub is too "bulky"? The City hub is only 4 wide - I like that layout one very much. In addition, the weight of the batteries in the two hubs (although being AAA's) may add to stability of the build?

Just guessing.

This really is a brilliant MOC. Outstanding.

Best,
Thorsten 

Edited August 1, 2023 by Toastie

[Bricksley]

20 hours ago, 2GodBDGlory said:

That's an interesting choice to use two PU train battery boxes instead of a Technic hub. Was that done to allow for simpler remote control without a phone go-between?

 

14 hours ago, gyenesvi said:

Cool way of using two controllers together.

I also had the same question in mind, but if I look at the build, I'd also guess that the two smaller hubs were actually a better fit space-wise for the shape than the one large hub would have been..?

 

22 minutes ago, Toastie said:

Could be; or maybe the Technic hub is too "bulky"? The City hub is only 4 wide - I like that layout one very much. In addition, the weight of the batteries in the two hubs (although being AAA's) may add to stability of the build?

Just guessing.

This really is a brilliant MOC. Outstanding.

Best,
Thorsten 

Each of you is somewhat right and the answer to the question, there were several reasons for such use:
1. The model was supposed to be prepared for technic mock-ups at exhibitions (such as BrickCreek) so the PF control is out, and since I don't prefer third-party electronics in LEGO models, I chose C+, because I have interesting experience building a dozer.
2. The standard HUB from the Technic sets is definitely too big for this scale and I don't like the control from the phone.
3. In the dozer I used the Spike/Mindstorms HUB and with the code from the Mindstorms app and control via pad from Xbox I have a very good experience, but:
- I didn't need to use as many as 6 ports here,
- smaller in size than Technic HUB, but connectors from the sides even with a compact size was problematic here, remember the frame is 9s wide, we subtract the brick casing and only 7 remains,
- the advantage is the ability to charge without removing the model, but when driving at the exhibition there is sometimes no time to charge and it is easier to replace the batteries / rechargeable battery, here you would need an additional HUB with a replacement battery, currently I don't have a third set (but it will be because the MOCs are waiting ; )),
4. Powered Up HUBs (train sets) are perfect here:
- compact dimensions,
- possible replacement of batteries / rechargeable battery (I ride on rechargeable battery on the film, hence some movements may be a bit slower),
- the ability to control remote controls,
- on local portals with announcements/offers, the HUBs themselves and the remote controls are at relatively low prices, e.g. in relation to S@H,

The only drawback - but this is typical for such MOCs - is the excessive load on the rear part, so in the front of the frame (under the bucket arm) there is an old weight from LEGO ships :)

 

Thanks for good words, nice that You liked it :)

[Timewhatistime]

Yellow construction machinery is always a good choice for Technic MOCs!

@ Bricksley: Is the arm's pivot aligned with the universal joint's center?

The pictures seem to show that it is not... but I couldn't imagine that.

[Bricksley]

3 hours ago, Timewhatistime said:

@ Bricksley: Is the arm's pivot aligned with the universal joint's center?

The pictures seem to show that it is not... but I couldn't imagine that.

Of course, it's correctly assembled.

See below :)

 

[Timewhatistime]

It still looks (for me, at least) like an horizontal 2L offset between the arm's pivot and the universal joint's middle part (i.e. the linkage)... 

... but I believe this is done on purpose: This arrangement contributes to balancing the bucket while it is lowered or raised.

Thanks a lot for the pictures!

Edited August 2, 2023 by Timewhatistime

[nerdsforprez]

I am impressed with these builds for several reasons.  And by "these builds" I mean this one and others such as @eric trax's recent Doosan submission, where Technic or functional elements, electronics, etc. create the chassis and backbone of the build but the exterior and design elements are mostly done with regular System bricks.  

Both this submission and Eric's Doosan model have great functionality, great as any Technic set or MOC.  But the looks are on an entirely different level.  They make differentiating between the real thing versus Lego model really difficult at times.  The use of system bricks is impressive for so many reasons.  But one often not mentioned in the sense of mastery, organization, and knowledge of bricks that is needed for these builds rather than that of just Technic elements.  It really is a huge undertaking.  For me, I prefer to just build with Technic.  This is for several reasons, but one of those reasons is that I find it hard enough to organize, master, and become acquainted with JUST Technic elements let alone learning, using, organizing etc. regular system bricks.   Especially in recent years with all the evolution of Technic, it is hard to keep up with all the changes.  

I can't imagine keeping up with Technic elements, organizing them, learning how to use them, etc. and also system bricks, at least not to the degree these builds (and others) appear to have attained.  Although many of my builds have also included both, I find these types of builds much more difficult and time consuming compared to builds that just use one system.  Great work both of you... fun to see.  

[Bricksley]

2 hours ago, Timewhatistime said:

It still looks (for me, at least) like an horizontal 2L offset between the arm's pivot and the universal joint's middle part (i.e. the linkage)... 

... but I believe this is done on purpose: This arrangement contributes to balancing the bucket while it is lowered or raised.

Thanks a lot for the pictures!

Okay, a little misunderstanding. I thought you were asking strictly about the point of cross the joint or it coincides with the point of rotation of the bucket cylinder.

Whereas what you're actually asking is yes - that's right, there is a 2s offset, but it's consistent with a real machine. There is no rule that the attachment point of the bucket cylinder should coincide with the point of rotation of the arm - in fact, they can be moved in both directions (X and Y axis), it all depends on the specific geometry of the arm. In the design of real machines there are a lot of variables that affect it :)

It should also be remembered that in the blocks it is impossible to perfectly reproduce the geometry - the grid is every 1s or possibly 0.5 in the case of the Technic construction where we must remember about strength. In addition, the liftarms have fixed angles and the cylinders cannot be of any length - all this also translates into the mapping of a real machine.

Edited August 2, 2023 by Bricksley

[Saruzeufel]

Overwhelming attention to detail, this looks fantastic! Really like how well the system peices are blended with functional technic elements. Seems to be very sturdy as well.

Also construction equipment (especially the uncommon ones like this) are always great. Very well done.