2-4. OPERATING PROCEDURES - Continued
Allow the remaining fuel in combustion chamber to bum out.
Remove the fuel tank from the heater.
Drain the tank.
Clean the outside of the tank with a stiff brush (Item 9, Appendix E), and hot water.
With the fuel valve removed, flush the fuel tank with a small amount of fuel to be sure all sediment and
foreign matter are removed.
Removing the fuel valve and opening either the vent plug or the filler plug will
eliminate possible vacuum and allow all liquid to drain from the tank.
Inspect the tank for leaks. Replace the tank as required.
After the smokestacks have cooled, remove them from the heater (Figure 2-2).
Remove the soot from the smokestack sections.