I've driven our c-7 powered coach up the Grapevine, over Onyx Summit, the Bshop grades/Mammoth, and up to Shaver Lake pulling the toad. All in summer heat conditions. The temp's have never exceeded 200. But perhaps our coach is smaller/lighter? ...
I also have a Cat C-7 powered DP. Always runs between 186 to 195. Even up steep grades in high heat, its never run over 200 pulling a toad. Check that radiator and make sure the slobber tube is extended to the rear of the coach behind and below th...
