Running gen while on the road

Onan indicates in my manual not to run the generator without the cover because it will run hotter. Onan has had some problems with fuel pumps getting too hot. My fuel pump was replaced under warranty. If I encounter another problem with my Onan fuel pump I am going to move it over to the MH frame where it will stay cooler. The Onan repairman told me many of the generators are sold as complete units so Onan puts the fuel pump on the generator where it gets too hot. The Onan gererators are not built just for RVs. The code thrown by the generator should indicate if the generator has a lacking fuel problem.