File:MogulPonyPivotRepair 3188.jpg

The new components are assembled for a test fit on the pony truck. A 1/4-20 bolt is inserted through the backside of the cover plate. The pivot is threaded onto the bolt and tightened. A lock washer and self locking bolt complete the assembly. The original drawings specify using a much longer pivot bolt with a spring arrangement. I felt the bolt came too close to the track. By reducing the diameter of the pivot point the truck naturally has more room to "wiggle" (especially vertically). Notice the bolt is not tightened onto the lock washer. The lock washer is acting as a small spring in this case to keep the pony truck pushed up against the pivot point. Photo by Daris A. Nevil.