[1:14,5] CAT330D-L Full Hydraulic

Hello everyone, i am here to share with you my project and hope you enjoy it.

For the beginning i show you some photos of the central part of the undercarriage, i still have to make some machining...











The hydraulic rotary manifold,

















The freewheel with sliders and the support,







































And the assembly,















See you soon!

Hallo Enrico,

very good work from you! I am waiting for more pictures. The parts you show us, are perfect.

Matthias

Thank you Matthias, nice to meet you.

Here some other pictures of the rotary Platform, the first model of the chain link and a cylinder.





























Goodbye everyone!

Hi Enrico,

do you`ve pictures how the hydr. rotary union was built? Also wanna see the hydraulic motor details in the drive train!

The chainlinks looks good but why there are no holes in the shoes? This could be a problem when driving through dirt because the sprocket will press the dirt more and more into the link.

...and in german

Bilder vom Zusammenbau der Drehdurchführung und Details von den Hydro-Motoren wären super.

Kettenglieder sehen gut aus, aber warum fehlt das Loch in der Platte? Könnte Probleme geben, wenn du durch den Dreck fährst, weil das Kettenblatt den Dreck immer mehr ins Kettenglied drückt.

Hello Markus, nice to meet you.
The rotary union is quite simple, below i show you a general scheme, in my model is the same.



Sorry for the bad quality of the picture, hope is enough to understand.

The hydraulic motor is of the orbital type, has 7,8 cm^3 of displacement and no drain...





























And this is my little test bench.









The problem of the dirt that packs into the chain links is well known but i have designed the links to have the maximum strenght and the middle section with that holes is too much thin (i think that but maybe i'm wrong). In the next posts you will see the complete chain that is slightly different from the first model and i will explain how i hope to minimize the dirt problem.

See you soon!

Hi everyone, i'm here with some other photos of the cylinders, piping work and the main arm...























See you soon...

Hello,
now i show you the rollers and the chain links...















And finally the complete chain assembled...













Bye!

This looks amazing, Erik!
The overlap on the tread plates looks super-realistic!

Thanks a lot JensR, this is exactly what i wanted and i am happy that you noticed it.

Hello everyone,

i have a new step in the construction, i have built the prototype of the open centre valve and started to test it.

The system working pressure is 22 Atm, the relief pressure is 2-3 Atm, relief current drain is 1,5-1,8 Amps and the pump run with 20% of gas. The center dead-zone of the valve is 4° per side and in zero position the cylinder is well locked and the force needed to rotate the valve is not much, so i am satisfied. I show you two photos and a video....





https://www.youtube.com/watch?v=6rOSZWjEAQI

In a few days i hope to do some tests with the load on the cylinder.
See you soon, bye.

Enrico.

Hi, now i am working on the cabin of the model and here are some pictures from CAD...









Bye...

Fantastic!

And nice work on the valve, just saw it now!

Thanks JensR, you are right, the youtube link is hard to notice.
If you know how the youtube player can be linked to the forum, can you say it to me please?

See you...

Embedding is not supported, but if YOU SHOUT REALLY LOUDLY people will notice the video link!

Ok JensR, i'll take into account your hint for the next times...

See you soon...

an amazing job! I sit in the front row to follow your progress
thanks for sharing!

Hi Tessen, thank you for watching!!

AMAZING!!!!!!!! Top Top Top !!!!

Hi,

Now some news about the internal of the cabin, some photos of the parts under construction, still to be finished.

The lateral console,



The armrets,


And the joysticks,





See you...

Hi everyone,

I show you a short video of the hydraulic motor running and for who has not noticed the previous link i add the open centre valve video...



YOUTUBE VIDEO


http://www.youtube.com/watch?v=8Bh3Zmr4MxM

http://www.youtube.com/watch?v=6rOSZWjEAQI


My greetings ,

Enrico