A rigged and animated bulldozer undercarriage.
Modelled, textured, rigged and animated in Blender 2.79b.
Bulldozer Undercarriage Rigged (High-Poly Version)
How it looks in Blender.
Texturized low-poly version.
I tried to keep it low-poly as possible for a bulldozer undercarriage.
Version with one mesh but with weighting for the animation.
Version with all parts which are parents to the animation bones (no bone influence for the meshes)