One of the only things almost that we didn't replace on the 2 powermatics we had was the burner coil, we had a spare, but never used it while I was there.
I learned early in life about not cooling things down properly. I warped a few heads on my Ford V-8 flatties by running straight stacks with out flappers. Had a 72 Caddy Eldy with a 425HP 500 Cube that some how collapsed the inner wall of a dual walled exhaust pipe between the crossover and the muffler. Talk about fun to find this problem.
We always cooled the Steam Way systems down unless the damned things shut off in the middle of the job like they had a habit of doing. I even had Henry K's home phone number. (Good seeing him at the Steam Way out side demo at Connections 2 years ago)
We were sure we would freeze and split it running in 20 below weather and wanted to be prepared. We never did in my tenior with those machines which was 80-81-82-83 and 84.
We had propane catalytic heaters set at 40 degrees and 12 volt fans blowing the warm air to all areas of the van.
Evan with all the protection it's funny that we would still freeze quick connects and the 3/8s solution hose and not our 1/4 inch lines and QD for our
Prochem or Hydra Master units. We just carried 2 sets of solution lines and stored on top of machine to keep thawed out.