GE MS6001B, Maintenance Instructions Manual

Page: 190 / 370

Inspection and Maintenance — GEK 107048 Combustion Inspection — Inspection Procedures
CI-I-4
Figure CI-I.3. Primary Fuel Nozzle Detail.
Inspect and Clean the End Covers
1. Set up cover and blow clean steam (do not add detergent or other cleaners) through the fuel gas
and atomizing air passages until they appear to be clear.
2. Chase the threads on the end cover, if they require it, with the proper tap.
3. Record findings on Inspection Form PGS/GT–FF–WS26.
Inspect and Clean Primary Fuel Nozzles (After Disassembly)
Note: The length of time required to thoroughly clean the fuel nozzles will
largely depend upon the fuel used, turbine running time, and the type
of cleaner used. The following method is the recommended approach
for cleaning fuel nozzle components.
1. Inspect parts for major carbon buildup, and for plugged slots or orifices prior to cleaning. If there
has been a fuel oil leak into the atomizing air passages, it will be necessary to remove the oil and