Mike,
That center piece that the doors latch to also has to come out. We have replaced more than one over the years. We had two Whirlpools go bad, but I think that was because of bad electric at a mobile home park we stayed at for 3 years before retiring.
We had a home-made four wheel furniture dolly (fairly small) that I used primarily for moving around a Honda 3000EU generator. When we replaced our refrigerator, I built an "insert" that would go onto that dolly, which made it the right height to swing the fridge around the island and into its cabinet space. That dolly and insert ended up being about the right height to use to pull out the washer and maneuver it down the hallway.
Once in the hallway, we tipped the washer off of the dolly and got under it with a two wheel dolly from the bedroom side. That let us take it down the stairs to the main floor. Then, we moved the two wheel dolly around to pull the washer towards the door. Working around that way let us use the two wheel dolly to take it right on out the door.
As for the furniture dolly and insert, I have pictures of that at a blog that I used to publish. It is at the following link.
Preparing for Residential Refrigerator Modification - Stage Two
Hope this helps you. To protect the washer cabinet lower trim, I think we tipped the washer back and put a piece of board just inside the trim to protect it while pulling out the washer.
Terry