Interesting, about a year ago I was discussing a "work-around" for linking the engine cooling fan to the dash A/C with our ACA Tech, Mark; and the former Cummins business rep, Mike Young, in Yakima. At that time, Mike expressed concern that the drive shaft [Power Take Off [PTO]] on the Cummins engine was at max capacity with both the air compressor and the hydraulic pump being driven by a single gear/shaft. I have not heard of any/many Cummins PTO failures on this forum, but it was a concern for Mike.
2003 40' MDTS
Garden Ridge, Texas