GE MS6001B, Maintenance Instructions Manual

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Combustion Inspection — Inspection Procedures Inspection and Maintenance — GEK 107048
CI-I-1
II. Inspection Procedures For MS-6001B DLN-1 Combustion Systems
Operation 1 — How to Inspect Primary Fuel Nozzles
CAUTION
It is imperative that any fuel nozzle disassembly, cleaning,
inspection, reassembly, testing and reinstalling in unit be
performed in accordance with the following procedures.
General
This procedure details the tooling, fixtures, disassembly, inspection, reassembly and the requirements
for testing the reassembled fuel nozzles prior to returning to service.
If the customer/user does not have the capability of performing these tests, the nozzles should be re-
turned to Gas Turbine Division or qualified Gas Turbine repair facility for inspection, reassembly and
testing.
Your General Electric Company Field Service Representative can assist you in the returned material
procedures to return the fuel nozzles to the Gas Turbine Division or qualified Gas Turbine repair facil-
ity.
Disassemble the Primary Fuel Nozzle
See Figure CI-I.1 and CI-I.2
1. Identify, tag and/or mark each gas swirl tip, outer tip assembly and end cover, to prevent mixing
similar parts at reassembly. See Figure CI-I.3.
CAUTION
The removal of parts from the end cover should be done
with extreme care. Small nicks, scratches or other damage
to the flow surfaces and orifices can alter the nozzle flow
pattern and result in undesirable combustion characteris-
tics. The parts should be placed in clean containers and not
placed on steel work benches or surfaces where the parts
may be damaged. Wire baskets are acceptable containers.
See Figure CI-I.4.
2. Using the spanner wrench from the tool kit, remove the gas swirl tips and lockplates from the
cover. Discard the lockplates.