If you pull the fridge
out you'll have good access to both sides of the drain hose. If you do go to the trouble check the city hose for leaks
while you are in there and you can check the hose to the hand pump, mine had a small leak at the tank connection that i discovered because I could see the water level drop in the slightly transparent hose over 24 hours.
Pulling the fridge
: disconnect the black and white 12 v wires from the back access panel. unplug the 110v plug from the receptacle that is under the fridge
platform (access from front Driver side hold). close the propane
tank and then loosen the propane
line connection at the back of the fridge (use two wrenches don't twist the valve on the fridge), it would be a good idea to cover both ends of the propane
line to keep out debris. there were a few screws at the front of the fridge fastening it to the plywood underneath. Also check at the back, i had a temp control that had been screwed to the side of the exhaust shroud, i unscrewed it and temporarily hung it on the back of the fridge. I might be forgetting something but that should get you most of the way there.
In my case the fridge had a bulge in the sides that made it very tight to pull out, i slightly widened the opening using a sawsall with a fine tooth blade that made things easier to put back.