piddling with my coach

well, i've had my coach in the driveway for a week now just doing touch up and making it prestine. now i'm down to my last challenge and that's the genset radiator reservior. it has a small leak in it and i'm tyring to figure out how to fix it without dropping it down to change the reservior. it doesn't slide out and it's maddening not to be able to get to it from the top. it's there with the engine cover bolted on and i can't get to it. i have a maintenance policy, but just not excited about having the work done. i just don't have confidence it will be put back exactly as is. i'll try take one more look tomorrow and see if i can do somehow from the top.
everyone have a blessed day.