Cummins ISX 15

Click here to see where the elements are coming from.

Whoa, daddy. When iron went from 14 to 172 ppm, copper from 5 to 44, and lead from 12 to 88 ppm, it was clear this Cummins ISX 15 was headed for serious trouble. In the span of two months, the bearings wore completely through the lead babbitt layer and into the bronze layer underneath. There's no contamination that would have caused the poor wear.