Chapter 7 Inspection and Maintenance
7-10 750-177
Drum Seals
Inspect the areas around the drum seals and look for soot or hot gas leaks. If a problem is noted look for the
source of the leak. Remove the old insulation and sealant from around the drum. Using a pumpable insulation
material (p.n. 872-680), fill the void flush with the outside of the wall. Allow the area to set up and apply a
thick bead of high temperature silicone around the drum and install the cover plates.
Sight Port
Inspect the area around the sight port for paint discoloration. A hot spot around the rear sight port is caused
by either a poor seal between the sight port insulator and the wall, a cracked insulator or a flue gas leak at
the sight port cap.
Check the threads of the cap and sight tube. If necessary, clean the threads and/or replace the cap. If the
screws that hold the sight glass retainer in place are leaking tighten the screws or replace the cap.
To Next Page
Loading...
