GE MS6001B, Maintenance Instructions Manual

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Inspection and Maintenance — GEK 107048 Major Inspection — Disassembly Procedures
MI-D-4
7. Remove secondary fuel gas lines.
8. Remove false start drain tubing and manifold header.
9. Remove secondary fuel nozzles.
10. Remove the spark plugs.
11. Remove 11th stage cooling and sealing air lines.
Note: The 5th stage cooling and sealing air lines and the bearing sealing air
valve (VA14), if used, must also be removed from the upper half com-
pressor casing at this time.
12. Remove fuel nozzle/end cover assemblies.
13. Remove crossfire tube retainers, combustion liners and crossfire tubes.
14. Remove access port blank flange or air extraction piping manifold from upper section of turbine
casing.
15. Remove outer combustion casings.
Operation 3 — How to Remove Exhaust and Inlet Duct Access Panels
1. On straight up exhaust configurations, unbolt the removable exhaust duct transition piece panel
on the forward side of the panel.
2. On side exhaust configurations remove any architectural lagging, support members which may
interfere with turbine casing removal. Remove the cowl section from the top of the exhaust ple-
num. This will facilitate access to the exhaust hood for removal.
3. Remove the 11th stage extraction pipe and compressor bleed valve by unbolting the bleed valve
flange at compressor, loosen the “U” bracket, bellows clamp, and tubing connections and slip the
piping out of the slip joint.
4. Remove the forward and aft flex seal clamp bars and the flex seal plates.
5. Unbolt the forward exhaust plenum removable access panel. Rig to lift the panel.
6. Install a length of 4 in. pipe or timber and a mechanical jack across the horizontal opening of the
plenum and spread the panel sufficiently enough to remove the access panel. Lift the panel clear
of the unit.
7. Unbolt and remove the inlet plenum access door located in the lower right hand section of the ple-
num, looking with airflow.
Operation 4 — How to Take Initial Compressor and Turbine Rotor Positioning Checks
1. Refer to the Hot Gas Path Inspection, disassembly operation number 3 in this instruction manual,
for positioning checks procedure.