1/12 John Deere 870G

[carp]

nearly finished, i am missing the bucket cylinder that will hopefully arrive this week, just needs a coat of paint and some tidying done then can install the plumbing.


Caution images contain graphic agricultural welding!

[carp]

hydraulic test

http://www.youtube.com/watch?v=h3vfs7y4cEA
http://www.youtube.com/watch?v=YMDPbLjHOt0

running at 28bar it wont drag itself with the stick not sure if it should?

[dabears]

Looking good!

[RCP57]

Sweet! It's about time you posted pics and video! I doubt that any of them would have the power to drag themselves across grass. Lookin good! How fast are you spinning your pump? I bought an infared tach a few days ago and found out that the pump in my Volvo is turning at 5900+rpm.

Reg

[carp]

Reg i tested a bit more today it dragged itself across concrete no problem but on grass it just stalls the stick, according to my calculation the motor shouldnt run any faster than 4200 unloaded on a 4s lipo, maybe i will get a tach to check what speed mine is doing, 5900 its pretty quick! arent the pumps only rated for 5000rpm? hasnt stopped raining all day so havent be able to test outside, hopefully over the weekend i can give it a proper test drive.

[RCP57]

Sounds like it is similar to my volvo for power. I'm not sure what the production machines are capable of though(more/less)? I know that my pump is spinning way faster than I would like! It could stand to turn a little slower but not too much. I think a larger pump would have been much better for my machine. Hopefully you get the weather to try it out some more, and of course post more video!

Reg

[carp]

couple more videos, doesnt dig very well the soil is heavy and sticks to the teeth, also i think my bucket geometry is slightly wrong
http://www.youtube.com/watch?v=IaFfVZTRV0c
http://www.youtube.com/watch?v=9GswNyT77bI

[RCP57]

Dude that excavator is huge! Awesome! Looks to me like it is digging pretty well. It looks like the ground is pretty hard and like you said sticky, so I doubt most would even scratch the surface.... You've inspired me.... I'm goin to film a video of what I've been up to today... Thanks!