Replacement drive wheel

21st Century toys was kind enough to send me a free replacement drive wheel for tank. The original was cracked and tended to slip off of the brass drive nut and then the nut would just spin in place inside the plastic housing. The corners had worn away so bad that it was becoming a big problem.

You can see the small crack here.


This is the brass nut that drives the drive sprocket. The drive sprocket is held on only by the tension of the plastic around the shaft and the tendancy of the tracks to keep it in place.