the dover generators that i have worked on, have the brush rigging pinned. you are not able to move the rigging to adjust neutral. I have removed the pin once to try and get a generator that would not compound properly, i thought that i could adjust the rigging like i have on many other generators that i have worked on, It did not go well. i compounded the car, and let it run, the first few runs were ok, then we picked up a full load of people, the very next stop, the car pulled thru the brake violently and headed up with the doors wide open. luckily i was in the car and kept the people from exiting. very hairy. had to put the rigging back to where it was originally pinned. ultimately i had to pull the generator for repair, as i could not get the car to compound. just thought i would pass this on, in case anyone decides to remove that pin.