Cat 777D Mining Truck

[modelman]

I have been working on the screw drive mechanism for the truck for awhile now and I must say it has been "kicking my butt". I cut and hacked and re-made parts until I thought there was no way this was going to work but I finally got it right. This may be the shortest screw drive ever! I only had-2-"of travel on the shaft to make it work and something was in the way with every move I made. Oh well nobody said it was easy. Here are the pieces it took to make it work-

I had some alignment problems with all the parts fiting with the gearmotor so a friend told my how to make this self-aligning coupler. It's really simple but works great-

Here is everything put together in the frame-

Here is a short video of it dumping-

I need to get some shoulder bolts for all the hinge points and this part will be finished. That's all for now.