[MOC] Caterpillar M322D wheel excavator (42043 C-model)

[ace_klimax]

https://rebrickable.com/mocs/MOC-28810/klimax/caterpillar-m322d-wheel-excavator-42043-c-model

https://bricksafe.com/pages/klimax/caterpillar-m322d-wheel-excavator-42043-c-model

 

 

Wheeled excavator built just from 1 model parts (42043 Mercedes Benz), with many functions

FUNCTIONS:
unique:
2 functions transfered from base to superstructure through big turntable - steering and engine drive

manual functions:
HOG steering via beacon light
stabilizing legs (2 side on front, 1 working as shovel at back) operated with the same beacon light (not enough power to lift excavator :( )
gear for rotating superstructure
working 6piston inline engine driven by rear wheels + openable hood
handle to operate function of the attachment (*1 , *2)

motorized functions:
motorized pneumatic piston
battery box working as counterweight

pneumatic function:
4 pneumatic pistons raising boom, dipper and attachments

attachments:
*1 grabber shovel
*2 pneumatic hammer
*3 big excavator bucket
*4 smaller excavator bucket
(all of them use smaller pneumatic piston, so it can't be built at the same time)


Superstructure bodywork inspired by official lego 42006

except 42043 model, you would need:
* 2 loom bands (front stabilizing legs operation)
* 4697b pneumatic T-Piece from 42043 spare parts

183 pages of generated instructions (A4 landscape orientation) for base, superstructure with boom, 4 attachments and tubing schema - sample on bricksafe
Suited for experienced builder!

3 downsides:
* not enough gears for front stabilizing legs operation so not enough power to lift excavator :(
* superstructure is heavy due to motor and battery box and is leaning towards left side
* boom is heavy, even though it is raised via 2 pneumatic pistons it takes time




function color mapping schema

orange	x	motorized pneumatic piston
dark blue	x	supersturcture rotation
azure blue	x	rear wheel engine drive
green	x	operation function of attachment
red	x	base functions operator
-------->	gray	steering
-------->	pink	stabilizing legs

 

[Maaboo the Witch]

This is seriously cool and a good companion for 42053. Nice job. 

[jorgeopesi]

Would be great even not being a C-model  .

[MangaNOID]

Very nice with so many functions.  I really like the technic look that came about on this!

[mpj]

Well, very nice and different C model, with lots of functions.

Is it safe to attach 2 different sized pneumatic cylinders? Do they work correctly together?

My (small) criticism is about the title of this MOC: what does this excavator has of a Cat M 322 D ?

[ace_klimax]

Just now, mpj said:

Well, very nice and different C model, with lots of functions.

Is it safe to attach 2 different sized pneumatic cylinders? Do they work correctly together?

My (small) criticism is about the title of this MOC: what does this excavator has of a Cat M 322 D ?

2 different sized pneumatic cilinders work. If the lower ones would be same, it would be better, but then the narrow one on top doesn't have enought power to lift rest of boom.

I've tried all combinations at the bottom side with 1 or 2 cylinders and the narrow one helsp the bigger to lift the boom a little, also it looks cooler with 2 cylinders.

 

This CAT specs (https://s7d2.scene7.com/is/content/Caterpillar/C669414) i took as inspiration for building a model

But you are correct, 42043 set doesn't have much yellow color and several details i intentionally missed so i could complete the model in this small scale without needing of aditional parts from other set (e.g. not enough gears for implementation of moving front stabilizing legs > need of loom bands)

I should keep name as wheeled excavator, most of them of different manufacturers looks almost the same.

But i wanted to differentiate it from 42053 volvo excavator set, which I recall almost at the end of of building - totally forgot about it, initially didn't like this set when i came out from my dark ages 2 years ago

[mpj]

I understand.

When I red the topic title I expected to see a Yellow Cat excavator!