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Combustion Inspection — Inspection Procedures
9. The outer tip should be examined for orifice damage. The part should be replaced if the orifice is
dented or in any way distorted.
Operation 2 — How to Reassemble the Primary Fuel Nozzles
1. Since plastic coverings are often used to protect the surfaces of new or spare parts, be sure that
all plastic material is removed before reassembling the nozzle. Ensure that no plastic material re-
mains lodged on inside surfaces.
2. Do not use Teflon tape or liquid sealant anywhere in the fuel nozzle assembly.
3. Ensure that all gaskets are new. NEVER REUSE AN OLD GASKET.
4. Use FEL-PRO C-102 anti-seize compound on all threaded parts.
5. During reassembly of the fuel nozzle, use the torque values specified on the fuel nozzle assembly
drawing in the Parts Lists and Drawings volume of the Service Manual.
6. Use a torque wrench with a range from zero to approximately 20 percent above the maximum
torque required for assembly. The accuracy should be within 5 percent.
7. Wipe anti-seize compound lightly on the threads of each outer tip and on the corresponding threads
in the fuel nozzle body.
Effective Area Check of Primary Fuel Nozzle Gas Passage
1. The primary gas nozzle effective areas must be compared on an end cover to end cover basis. New
and reconditioned fuel nozzle assemblies are tested as defined on the fuel nozzle assembly draw-
ing in the Parts Lists and Drawings Volume of the Service Manual.
2. If the customer wishes to do this testing, a procedure can be supplied by the GE field representa-
tive.
Storing the Primary Fuel Nozzle
1. Serviceable fuel nozzles should be maintained as complete assemblies in separate containers de-
signed to prevent damage to nozzles during storage. If the fuel nozzles are to be stored for an indef-
inite time, it is recommended that they be sprayed with oil prior to storage.
Operation 3 — How to Disassemble and Inspect Secondary Fuel Nozzles
Disassemble the Secondary Fuel Nozzle
1. Using a strap wrench, unscrew the outer gas tip from the assembly by overriding the lockplate.
2. Identify the outer tip and discard the locking ring.
3. Using a socket or box wrench, remove the transition piece assembly by again overriding the lock-
plate. Identify the part and discard the locking ring and the metal "O" ring seal.
CI-I-8
Inspection and Maintenance — GEK 107048
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