[Richard]

Yes, are you changing the dryer assembly, or just the filter.

It can be done with the tag tire in place, but it’s WAY easier to remove the tire.

Obviously, support the rear of the coach. Drain the air pressure. The air bags should stay up because the six pack isolates them. But you don’t want to be crammed into the wheel well without support for the coach.

Disconnect the air lines while the assembly is still bolted to the bulkhead. Then two bolts hold it to the bulkhead. The nuts for those bolts will be in the electrical cord bay. You may have to get your bride to hold a wrench on them while you hit the bolt head with the impact gun. My arm was not long enough to reach around the open compartment door.

If you are just changing the filter, then the oil plug breakaway torque was just a warmup. I found all the strap wrenches I had would slip on the filter. My eventual solution was to clean the exterior of the filter with brake cleaner, then wrap it with the self sealing urethane tape available at Lowes/HD. Then the strap wrench would grab. Warning, if you resort to the old big screwdriver puncture trick, you will rupture the filter and spill all the little desiccant beads into the purge valve. That is no bueno.