Hi all,
I have actually started the work on the rear axles, my goal was as little as possible changes, I wanted to use original axles and keep the way they are attached to the chassis. Currently I am not planning to carry huge loads around, it should just drive. Hence I have used pretty small engines, 12 V with a gear and going 300 RPM. The base plate is 3d printed but not ideal yet, still somewhat to high.
Video MAN Dump truck drivetrain
The biggest pain was actually how to get the wheels off the axles without cutting the axles, here my lathe was very helpful, just a few seconds by full speed and done.
I had to make my own bushings to fit the sprocket to the original axle.