Ny-Lint Mobile Dragline Conversion

[Rvjimd]

Guys,

I'm trying to improve the crawler on my crane. I decided to try the "Z" style drive tumbler. My question, do the lower idlers help keep the tracks centered?

Here is a pic of what I'm trying to do. Not sure what it is on? Old something?



Anyone have any drawings of the idlers for something like this? Why are some like this and other like center wheel and knobs on the driver?

Thanks, Jim

[Rvjimd]

Here is my prototype Z tumbler. Now I'm trying to figure out what to use for the new drive "stubs" or dogs or whatever they are called? The little nub on the track links. I need something a bit wider than the current version.



Jim

[Jared]

Originally Posted by Rvjimd

My question, do the lower idlers help keep the tracks centered?

Yep. And I think the bottom rollers should be spaced different than the spacing of the lugs so the track can't slip around them. That way at least one or two rollers and lugs will always be engaged.

Originally Posted by Rvjimd

Why are some like this and other like center wheel and knobs on the driver?

My guess is patents. Someone patents one style so the next guy has to figure out his own way. And always there's the quest for a better mousetrap.