CAT330D-L full hydraulic

[avel]

The tubing is very pliable but you can also immerse it in hot water and then bend it and once it cools it will hold it's shape a lot better.

Erik79, When you say open center valve do you mean that when the valve is closed the fluid is allowed to circulate through the system so that the pump runs more efficiently?

[Rvjimd]

Thanks, I meant to say NOT kink, and I should have also indicated the copper and aluminum tubing. I did a lot of aluminum tubing when I built my RV6 but it was all quite a bit bigger diameter than the stuff on the excavator and I was not going for the tight radius that I see here, and even that was trouble in a few spots.

Jim

[Erik79]

@avel, yes, exactly. In the video you can see when the valve is in the center position system pressure and current drain drastically decrease. In this condition the pump does not wear and produce the minimum of the heat, nevertheless the overall efficiency increase and so the autonomy become longer. In the center position with the MiMh 10 cells battery i have chosen the system can run hours and hours.

@rvjimd, the brass and copper tubes are not much simple to bend, but with some tools it's possible. I use some little metal wheels with the radial section of the same radius of the tube you have to bend. Next time i show you some photos.

Enrico.

[Erik79]

Hi everyone!

Recently i'm working to design and build the cabin of the model.

Some pictures from CAD...









See you...