Dragline Crawler Build

[tracksntreadslou]

looking good Jim ..quite a challenge and not your typical build ...your working through some pretty difficult challenges ..If you have a rotory table / Drill press you should be able to make your own spockets ..I did make my own for the Dozer.. A bit of math and you probably knew already though ...your circumference should match your pitch ..10 tooth x .25 pitch = 2.5 circumference
so diameter would be 2.5 divided 3.14 = .796 .Thats where you would drill your 10 holes
Overall sproket diameter would be bigger ..dont remember how many turns it took for one rotation of the RT but im sure you would figure it out from there..I did have to touch up a few of the teeth with a dremel though
I started out with with a 3x3 square .2 thick aluminum plate ..scroled the diameter of the circumference ..drilled the center and used a bolt and nut through the center hole to mount in the RT .Once the holes were drilled i cut out the sprockets with a band saw ..hope this helps you out a little

[Rvjimd]

Lou,

Thanks for the tips. My parts might be here Monday so I can see how stuff fits. If I'm lucky I might be able to use what I ordered.

Got a bit more done today. Actually took some video trying to dig wet sand but it sticks in the bucket so bad it wasn't worth posting. Besides, I don't have the tracks moving yet anyhow I just wanted to see how it looked digging, sitting on the new undercarriage!

These are shots of the threaded bushing that inserts into the hole in the cab. The hollow stud is an old 1/2-13 bolt that I bored to run the wires from the slip ring.









Maybe I can dry out some sand Sunday and post a digging video...

Jim

[Rvjimd]

Some more pics...

It looks SO much better all rigged with a bucket on it!



I took one motor apart to match drill mounting holes (which I ended up NOT using) this is a "how the heck does this sucker go back together" photo.



This shot is too close to really see the setup. This is where I clamped the cab down to the mill table and used a fly cutter to enlarge the pivot hole.



Jim