INSPECT HEATER PARTS (AVIM)
Remove tube and cone assembly (3) from
combustion chamber (4).
Slight scaling and discoloration on
combustion chamber are normal. Do
not replace combustion chamber
unless scaling or discoloration covers
large area or causes distortion.
Tap lightly on discolored areas on combustion
chamber (4) with ballpeen hammer. Area shall
not give soft response or dull sound.
Check tube and cone assembly (3) for distortion
or warping along full length of passage (6).
Diameter shall not be reduced by more than 10
Inspect tube and cone assembly (3) for cracks
and pinholes as follows:
Close all tube and cone assembly openings
Pressurize tube and cone assembly (3) with
air up to 6 psi.
Submerge tube and cone assembly (3) in
There shall be no air bubbles.
Inspect all other heater parts (8) for nicks, tears,
or dents that can cause leaks or affect operation
END OF TASK