GE MS6001B Technical specifications

GE Power Systems
Gas Turbine
GEK 107048
Rev. 0 (11/98)
Inspection and Maintenance Instructions
For MS-6001B Gas Turbines
With DLN-1 Combustion Systems
Gas Only

Gas Turbine InspectionandMaintenance—GEK107048
I–2
THIS PAGE INTENTIONALLY LEFT BLANK.

NoteInspection and Maintenance
NEW FORMAT
The Combustion Inspection,Hot GasPath Inspectionand MajorInspection sections
of this manual have been reformatted to separate the Disassembly, Inspection, and
Reassembly Operations for each inspection. The figure numbers and page numbers
have also been revised to follow this format.
A“D”precedingafigureorpagenumberisusedfortheDisassemblysection,an“I”
is used for the Inspection section, and an “R” is used for the Reassembly section.

Inspection and MaintenanceNote
THIS PAGE INTENTIONALLY LEFT BLANK.

Table of ContentsInspectionand Maintenance — GEK 107048
i
TABLE OF CONTENTS
Inspection and Maintenance Instructions
INTRODUCTION
General I-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Factors Affecting Maintenance I-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Types of Inspection I-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection Intervals I-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STANDARD PRACTICES
General SP-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bolt and Stud Torquing SP-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Solvents, Sealers and Cleaners SP-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication Guidance SP-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Turbine Compressor Cleaning SP-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tools and Equipment SP-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools (MS-6001B DLN-1) SP-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering SP-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Returning Turbine Parts for Repair/Replacement SP-41. . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Parts Recommendations SP-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion Inspection SP-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hot Gas Path Inspection SP-45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Major Inspection SP-50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUXILIARY AND CONTROLS SYSTEM MAINTENANCE
Index Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Periodic Inspection Schedule ACSM-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Maintenance Procedures IMP-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCHEDULED TURBINE MAINTENANCE
Running Inspections STM-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Housekeeping STM-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Recording STM-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Inspections STM-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Borescope Inspections STM-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMBUSTION INSPECTION
Index Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly CI-D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection CI-I-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly CI-R-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HOT GAS PATH INSPECTION
Index Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly HGP-D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection HGP-I-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly HGP-R-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

InspectionandMaintenance—GEK107048Table of Contents
ii
MAJOR INSPECTION
Index Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly MI-D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection MI-I-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly MI-R-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE INSPECTION FORMS
List of all MS-6001B DLN-1 Inspection Forms MF-1. . . . . . . . . . . . . . . . . . . . . . . . . .
Forms MF-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of ContentsInspectionand Maintenance — GEK 107048
iii
LIST OF ILLUSTRATIONS
Figure Title Page
1-1 Parts Life-Factors I-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Effect of Fuel I-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 Effect of Starts I-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Maintenance Inspections — Model Series 6000 Estimated Outage Requirements. I-8. .
1-5 Types of Shutdown Inspections I-59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6 VIGV Bushing Wear Inspection Procedures I-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Typical Flange Joint Makeup SP-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Special Tools. SP-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
to to
2-38 SP-40
4-1 Borescope Access Hole Locations STM-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2 Borescope Light Supply STM-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-3 Borescope Probes and Light Supply Connector STM-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-4 Scope Support Fixture STM-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-5 TV Monitor Presentation STM-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.1 Combustion Arrangement CI-D-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.2 Combustion System Components. CI-D-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.3 Inside End Cover/Primary Fuel Nozzle CI-D-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.4 Outside End Cover/Primary Fuel Nozzle Arrangement. CI-D-5. . . . . . . . . . . . . . . . . . . . . . .
CI-D.5 Transition Piece CI-D-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.6 Swagelok Fitting With Stop Collar CI-D-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.7 False Start Drain Piping CI-D-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.8 Secondary Fuel Nozzle CI-D-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.9 Suggested Storage and Moving Rack For Secondary Fuel Nozzles CI-D-11. . . . . . . . . . . . . .
CI-D.10 Spark Plug Assembly CI-D-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.11 End Cover With Primary Nozzles and Guide Pins CI-D-15. . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.12 Typical Multi-Nozzle Assembly, Moving and Storage Fixture. CI-D-15. . . . . . . . . . . . . . . . .
CI-D.13 Crossfire Tube Assembly CI-D-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.14 Location of Crossfire Tube Spring Retainer CI-D-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.15 Cap and Liner Removal Tool CI-D-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.16 Combustion Outer Casing CI-D-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.17 Air Extraction Manifold CI-D-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.18 Outer Casing Arrangement CI-D-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.19 Flow Sleeve. CI-D-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.20 Disassembly End Seal and Stop Block CI-D-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-D.21 Transition Piece Lockplating Aft Bracket Bolts CI-D-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.1 End Cover/Fuel Nozzle Arrangement (Outside) CI-I-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.2 End Cover/Fuel Nozzle Arrangement (Inside) CI-I-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.3 Primary Fuel Nozzle Detail CI-I-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.4 Fuel Nozzle Cleaning Parts Basket CI-I-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.5 Typical Fuel Nozzle Cleaning and Rinsing Tank CI-I-5. . . . . . . . . . . . . . . . . . . . . . . . . . . .

InspectionandMaintenance—GEK107048Table of Contents
iv
Figure Title Page
CI-I.6 Cap and Liner Details CI-I-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.7 Cap, End View CI-I-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.8 Combustion Liner Spring Seal Inspection Areas CI-I-19. . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.9 Typical Slot Cooled Combustion Liner Rolled Ring Section CI-I-19. . . . . . . . . . . . . . . . . . .
CI-I.10 Transition Piece CI-I-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.11 Transition Piece (“B” Style) Inspection Area Locations CI-I-28. . . . . . . . . . . . . . . . . . . . . . .
CI-I.12 Flow Sleeve CI-I-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-I.13 Combustion Outer Casing CI-I-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.1 Transition Piece Aft Bracket Guide Pin Assembly CI-R-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.2 Transition Piece Support Clamp (Bullhorn) Assembly. CI-R-3. . . . . . . . . . . . . . . . . . . . . . .
CI-R.3 Transition Piece Side Seal Clearance CI-R-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.4 Transition Piece Centralization Checks Setup CI-R-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.5 Transition Piece Support Clamp (Bullhorn) Assembly Checks CI-R-7. . . . . . . . . . . . . . . . .
CI-R.6 Transition Piece to First-Stage Nozzle Retaining Ring Clearance Checks. CI-R-9. . . . . . . .
CI-R.7 Transition Piece Lockplating of Aft Bracket Bolts CI-R-10. . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.8 Assembly of End Seal and Stop Block Assembly to Transition Piece CI-R-11. . . . . . . . . . . .
CI-R.9 Combustion Flow Sleeve CI-R-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.10 Outer Casing and Flow Sleeve Assembly CI-R-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.11 Outer Combustion Casing Alignment Pin CI-R-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.12 Outer Crossfire Tube CI-R-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.13 Crossfire Tube Assembly CI-R-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.14 Spark Plug Assembly CI-R-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-R.15 Primary Flame Detector CI-R-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.1 Rotor Position Probe. HGP-D-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.2 Support Jack Locations for Compressor and Turbine Casings HGP-D-6. . . . . . . . . . . . . . . . . .
HGP-D.3 Turbine Casing Rigging for Removal. HGP-D-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.4 Guide Pin Locations. HGP-D-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.5 Loading for Second-Stage Nozzle Clearances. HGP-D-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.6 Loading for Third-Stage Nozzle Clearances. HGP-D-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.7 Nozzle Clearance Wedging Block. HGP-D-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.8 Set Point “A”. HGP-D-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.9 Proper Method for Reading Axial Clearances. HGP-D-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.10 Set Point “B”. HGP-D-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.11 First-Stage Nozzle Concentricity Checks HGP-D-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-D.12 First-Stage Nozzle Lifting Angles for Support Pad and or Support Pin Type Nozzle. HGP-D-21
HGP-D.13 Second and Third-Stage Nozzle Segments. HGP-D-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.1 Nozzle Sidewall Cracks. HGP-I-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.2 Nozzle Sidewall Cracks. HGP-I-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.3 Nozzle Partition Fillet Cracks. HGP-I-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.4 Nozzle Partition Fillet Cracks. HGP-I-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.5 Nozzle Sidewall Surface Cracks. HGP-I-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.6 Unacceptable Cracks. HGP-I-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.7 Unacceptable Crack Propagation. HGP-I-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of ContentsInspectionand Maintenance — GEK 107048
v
Figure Title Page
HGP-I.8 Unacceptable Crack Propagation. HGP-I-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.9 First-Stage Bucket Details. HGP-I-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.10 Second and Third-Stage Bucket Details. HGP-I-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.11 First-Stage Bucket Repair Limits. HGP-I-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.12 Second and Third-Stage Bucket Repair Limits. HGP-I-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.13 Radial Seal Pin Groove Repair Limits HGP-I-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.14 Wheelspace Seal Angel Wings Cross Sections. HGP-I-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.15 Shroud Tip Rework Limits HGP-I-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.16 Turbine Shroud Blocks HGP-I-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.17 Second-Stage Nozzle and Diaphragm. HGP-I-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-I.18 Third-Stage Nozzle and Diaphragm. HGP-I-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-R.1 Eccentric Pin Retaining Strap Weld. HGP-R-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-R.2 First-Stage Nozzle Tangential Support Pin and Hardware Assembly. HGP-R-5. . . . . . . . . . . .
HGP-R.3 Second-Stage Nozzle Seals and Radial Retaining Pins. HGP-R-8. . . . . . . . . . . . . . . . . . . . . . .
HGP-R.4 Third-Stage Nozzle Seals and Radial Retaining Pins. HGP-R-9. . . . . . . . . . . . . . . . . . . . . . . . .
HGP-R.5 First-Stage Nozzle Support Ring with Support Pad or Tangential Pin Groove. HGP-R-11. . . . .
HGP-R.6 Turbine Casing Rigged for Reinstallation. HGP-R-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-R.7 Typical Bolt Tightening Sequence for Unit Casings HGP-R-16. . . . . . . . . . . . . . . . . . . . . . . . . .
HGP-R.8 Exhaust Plenum Seal Segments, Forward and Aft Sides Assembly HGP-R-19. . . . . . . . . . . . . .
MI-D.1 Support Jack Locations for Compressor and Turbine Casings MI-D-7. . . . . . . . . . . . . . . . . .
MI-D.2 Guide Pin Locations. MI-D-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MI-D.3 Twelve Point Bolts in Inlet Casing. MI-D-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MI-D.4 Inlet Guide Vane Ring Support Plate and Locking Bolt. MI-D-13. . . . . . . . . . . . . . . . . . . . . . .
MI-D.5 First-Stage Nozzle Support Ring and Support Groove. MI-D-15. . . . . . . . . . . . . . . . . . . . . . .
MI-D.6 Inner and Outer Compressor Discharge Casing Bolts MI-D-17. . . . . . . . . . . . . . . . . . . . . . . . .
MI-D.7 Compressor Discharge and AFT Compressor Casing Supported in Upright Position. MI-D-18
MI-D.8 Inner Compressor Discharge Casing at Initial Assembly MI-D-19. . . . . . . . . . . . . . . . . . . . . .
MI-D.9 Inner Compressor Discharge Casing with Upper Half Removed MI-D-20. . . . . . . . . . . . . . . .
MI-D.10 Number One Bearing Housing with Upper Half Removed MI-D-23. . . . . . . . . . . . . . . . . . . . .
MI-D.11 Number Two Bearing Strap and Upper Half Number Two Bearing Housing MI-D-24. . . . . . .
MI-D.12 Number Two Bearing Housing with Upper Half Removed MI-D-25. . . . . . . . . . . . . . . . . . . .
MI-I.1 Rotor Support Lever for Removal of Number Two Bearing Liner Lower Half MI-I-4. . . . .
MI-R.1 Guide Pin Locations. MI-R-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MI-R.2 Compressor Discharge Casing Bolt Tightening Sequence MI-R-5. . . . . . . . . . . . . . . . . . . . .
MI-R.3 Exhaust Plenum Seal Segments, Forward and AFT Sides Assembly MI-R-11. . . . . . . . . . . . .

InspectionandMaintenance—GEK107048Table of Contents
vi
LIST OF TABLES
Table Title Page
1-1 VIGV Bushing Inspection Schedule I-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Torque Values for Bolts and Studs SP-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Bolt and Stud Elongation Values SP-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1 MS-6001B DLN-1 Inspection Criteria STM-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2 MS-6001B DLN-1 Borescope Access Hole Locations STM-17. . . . . . . . . . . . . . . . . . . . . . . .
CI-1 Recommended Cleaning Compounds CI-I-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-2 Inspection Limits, MS-6001B DLN-1 Liners CI-I-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-3 Inspection Limits, Crossfire Tubes and Retainers CI-I-18. . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-4 Inspection Limits, Transition Piece Assembly CI-I-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-5 Inspection Limits, for Flow Sleeves CI-I-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CI-6 Inspection Limits, Spark Plugs CI-I-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Notes, Cautions and WarningsInspection and Maintenance
vii
NOTES, CAUTIONS AND WARNINGS
Notes, Cautions and Warnings will be found throughout this Maintenance Publication. It is important that the
significanceofeachis thoroughlyunderstoodbypersonnelusingtheseMaintenanceProcedures.Theirdefini-
tions are as follows:
Note: Highlights an essential element of a procedure to assure correctness.
CAUTION
Indicates a procedure or practice, which if not strictly
observed, could result in damage or destruction of
equipment.
**WARNING**
Indicates a procedure or practice, which could result
in injury to personnel or loss of life if not followed
correctly.
SAFETY
Thispublicationisdesignedtoprovidesafeproceduresand
processes for accomplishing the maintenance instructions
described herein. It is important, therefore, that the warn-
ings, cautions,and notesin theseprocedures bethoroughly
understood and observed by the personnel performing
maintenance. Changes or additions deemed necessary for
proper maintenance and/or suggested safety improve-
ments should be submitted to:
Manager: Technical Communications and Publishing
GE Company
Building 23, Room 290
1 River Road
Schenectady, New York 12345
Note: All dimensions called forthroughoutthemaintenancepublication arein
S.A.E. units first, followed by metric (where applicable) in brackets [ ].

Inspection and MaintenanceNotes, Cautions and Warnings
viii
THIS PAGE INTENTIONALLY LEFT BLANK.

INSERT
TAB
INTRODUCTION

GE Power Systems
Gas Turbine
Introduction
Rev. 0 (11/98) I–1
Introduction
Reformated, September 1991
GENERAL
Operation of the combustion gas turbine, as of any rotating power equipment, must include a planned pro-
gram of periodic inspection, with accompanying repair and replacement of parts as necessary,to ensure the
maximum availability and reliability of the unit.
The object of this Maintenance Section is threefold:
1.Toaidtheuserinbecomingfamiliarwiththeunitbyseparatingtheinspectionsaccordingtospecific
systems and, where appropriate, describing briefly the reason for the inspection and the action to
be taken.
2.To identify those components and parts that should be periodically examined between the initial
start-up tests and the designated inspection.
3.Inspectionintervalshereinarebasedonengineeringjudgmentandexperiencegainedwith gasturbine
units. Theactual time intervalestablishedfor any particular gas turbine should be based on the user’s
operating experience and on ambient conditions, such as humidity, dust, and corrosive atmosphere.
Prior to scheduled inspections or taking operating data, clean the compressor per the gas turbine compressor
cleaning procedure in the Water Wash/Cleaning Tab section of Volume II. Before and after any inspection a
complete set of operating data including vibration readings should be taken and recorded for reference. A re-
cord ofthe inspections made, and the maintenance work performed, will be most valuable in helping to estab-
lish a good maintenance program for the gas turbine unit(s). It is expected that the maintenance program will
start with minor work, and increase in magnitude over a period of time to a major overhaul, and then repeat
the cycle. The performance of inspections can be optimized to reduce unit outage time and maintenance cost
fora particular mode of operation, and still maintain maximum availability and reliability of the unit.
Operating Factors Affecting Maintenance
Note:Theeffectofmaintenancefactorsforfuel,startsandloaddutyarecu-
mulative if all the above factors are present. It should also be under-
stood that as the maintenance factor increases the time between in-
spections and components repairs decreases and it is possible that
component replacement frequency will increase.

Introduction Inspection and Maintenance
I–2
The factors having the greatest influence on the life of parts for any given machine are shown in Fig-
ure 1-1.
Fuel
The effect of the type of fuel on parts life is associated with the radiant energy in the combustion
process and the ability to atomize the various liquid fuels. Therefore, natural gas, which does not
requireatomization, has the lowestlevel of radiant energy and will produce the longest life of parts.
Naturalgas has been thetraditional fuelfor use with gas turbines. Due to the need to back up an inter-
ruptible gas supply many gas turbines are dual fuel with a distillate fuel oil used as the alternate fuel.
Contaminants in the fuel also affect maintenance intervals. This is particularly true for liquid fuels
inwhichdirtresultsinacceleratedreplacementofpumps,meteringelements,andfuelnozzles.Con-
taminants in fuel gas can erode or corrode control valves and fuel nozzles.
Starting Frequency
Each stop and start of a gas turbine subjects the hot gas path to significant thermal cycles. Control
systems are designed and adjusted to minimize this effect. However, a gas turbine with frequent
starting and stopping requirementswill demonstrate partslives that are shorterthan thosefor asimi-
lar unit in continuous-duty service. See Figure 1-3.
Load Cycle
The load cycle of the gas turbine, up to its continuous rating, will have little effect on parts lives,
provided it does not require frequent and rapid load changes.
Environment
The condition of the inlet air to the gas turbine can have a significant effect on maintenance costs
and intervals if it is either abrasive or corrosive. If abrasives are in the inlet air (e.g., as from sand
storms), careful attention should be paid to inlet filtering in order to minimize this effect.
If the gas turbine is to be operated in a corrosive atmosphere (for example, one with salts), careful
attention should be paid to the location of the inlet air arrangement and the application of correct
materials and protective coatings. It is essential during the planning stages of an application to rec-
ognize any abrasive or corrosive contaminants and to take the necessary steps to minimize them.
Contaminants in the fuel and air are additive.
Maintenance Practices
Parts condition information is based on estimates only, and willvary with machines and specificoperat-
ing conditions. However, estimates are basedon previous experienceand can be veryuseful in planning
a maintenance program. As actual operating data is accumulated on a specific application, adjustments
of inspection cycles should be the next step in a well-planned program.
Initial inspection planning can be based on the combustion inspection schedule, hot gas path inspection
schedule, and major inspection schedule tailored to your unit and estimated outage requirements listed
in Figure 1-4.

Inspection and Maintenance Introduction
I–3
It must berecognized that theforegoingestimated outagerequirements canbe used for estimating mainte-
nancecycles, however, these numbers will vary depending upon the many factors which establish the op-
erating conditions for a specific installation. The inspection cycles will vary depending upon fuel, duty
cycleand maintenance philosophy of the owner. The inspection manhours will vary depending upon pre-
planning, availability of parts, productivity, weather conditions, union regulations, supervision, etc.
Precise estimates of the outage duration resource requirements and costs associated with the inspection
of a specific installation may be obtained from your GE Company Apparatus and Engineering Services
Operation Representative.
Good maintenance planning for minimum down-time requires the availability of replacement parts, ei-
thernew or previously repaired, that can beexchangedwithexistingparts.Theexchangedpartscanthen
be repaired without extending the down-time.
To ensure optimum performance of the gas turbine, the minimum stock of spare parts should be able to
support the service inspection. A predetermined central location can stock spare parts that are adequate
for hot gas path inspection. Many gas turbine plants stock capital spare parts on-site, recognizing that
this parts availability minimizes the turn-around time required for major overhauls.
The planned maintenance program anticipates the needs of the equipment and is tailored to meet the re-
quirements of the system for utilization, reliability, and cost.
Types Of Inspections
The types of inspections covered in this publication may be broadly classified in terms of unit “running”
andunit “shutdown” inspections.The runninginspectionis performed during start-upandwhile the unit
is operating. This inspection indicates the general condition of the gas turbine unit and its associated
equipment. The shutdown inspection is performed while the unit is at a standstill. The shutdown inspec-
tions include “Combustion,” “Hot Gas Path,” and “Major” inspections. These latter inspections require
disassembly of the turbine in varying degrees. See Figure 1-5.
Turbine starting reliability can be aided by conducting a “standby” inspection while the unit is shut
down. Routine servicing of the battery system, changing of filters, checking oil and water levels, clean-
ing relays, checking device settings and calibrations, lubrication and other general preventative mainte-
nance can be performed in off-peak hours without interrupting the availability of the turbine. Certain
designated accessories in need of repair or replacement may be returned to the factory on either a repair
and return basis or an exchange basis.
GE Company Field Service Representatives are available to provide technical direction or consultation
for repair and replacement.
Periodic test runs are also an essential part of a good maintenance program. It is highly recommended
thatthe unit be operated atload for atleast 1hour bi-monthly, anddatarecorded. It isrecommended that
gas turbines on extended shutdown (three weeks or more) should be operated on turning gear or ratchet
for one hour each day to prevent the buildup of corrosive deposits in the turbine wheel dovetails or the
gas turbine should be operated at full speed, no load for one hour per week to dry the turbine out and
thereby prevent moisture condensation in the turbine dovetail crevices.
Specialinspectionssuchasborescopeand eddy current probe, can be used tofurther plan periodic main-
tenance without interrupting availability. It is also recommended that visual inspections be performed
whenever there is personnel at the unit.

Introduction Inspection and Maintenance
I–4
Combustion Inspection
A brief shutdown inspection is required to change out fuel nozzles and to check the combustion lin-
ers transition pieces and crossfire tubes. These parts require the most frequent attention, as contin-
ued operation with a deteriorated combustion system can result in much shortened life of the down-
stream parts, such as turbine nozzles and buckets. It is also inherent in the gas turbine design that
thesepartsarethefirsttorequirerepairorreplacement.Therefore,the importance of this inspection
in the maintenance program must be emphasized.
Figure 1-5 shows these components in relationship to one another.
Avisualinspectionoftheleadingedgeofthefirst-stageturbinenozzlepartitionsandbucketsshould
be made during the combustion inspection to note any wear or deterioration of these parts. This in-
spection will help to establish the schedule for the Hot Gas Path inspection.
The combustion liners, transition pieces, crossfire tubes, and fuel nozzles should be removed and
replaced with new or repaired liners, transition pieces, crossfire tubes and new or cleaned fuel
nozzles. This procedure reduces downtime to a minimum and the removed liners, transition pieces,
crossfire tubes, and fuel nozzles can be cleaned, inspected and repaired later when it is more conve-
nient.
After the combustion inspection is completed and the turbine has been returned to service, the re-
moved liners, and transition pieces can be bench inspected and repaired if necessary, by competent
service personnel, or off-site at a qualified service facility. Off-site cleaning inspection, and repair
of the liners and transition pieces is recommended, since this activity can best be performed where
specialized equipment and fixtures are available.
The removed fuel nozzles can be cleaned and calibrated on site. Fuel nozzles should be stored in
sets for use at the next inspection.
Hot Gas Path Inspection
The Hot Gas Path inspection includes the Combustion Inspection just described and, in addition,
a detailed inspection of the turbine nozzles and turbine buckets. To perform this inspection, the top
halfoftheturbinecase(shell),andthefirst-stagenozzlemustberemoved.Thesecond-stagenozzle,
the third-stage nozzle, and the turbine buckets will be inspected visually while still in place in the
unit. A complete set of turbine clearances should also be taken during any inspection of the hot gas
path. Figure 1-5 shows the components involved in the hot gas path inspection.
As with the combustion inspection, it is recommended that replacement combustion liners, fuel
nozzles and transition pieces be available for installation at the conclusion of the visual inspection.
The removed parts can then be inspected at a qualified service facility and returned to stock for use
during the next inspection. It is also recommended that the Hot Gas Path inspection be conducted
underthetechnicaldirectionof the GE Company FieldService Representative foraccurate analysis
of inspection data and most effective use of outage time.

Inspection and Maintenance Introduction
I–5
Major Inspection
The Major Inspection involves inspection of all of the major “flange-to-flange” components of the
gasturbine which aresubject to wearduring normal turbine operation.This inspection includesele-
mentsof the Combustionand HotGasPath inspections. In addition,casingsare inspected forcracks
and erosion, rotor and stator blades are to be checked for tip clearance, rubs, bowing, cracking, and
warpages. Shrouds are checked for clearance, erosion, rubbing and build-up. Seals and hook fits of
nozzles and diaphragms are inspected for rubs, erosion, fretting or thermal deterioration. The com-
pressor and inlet are inspected for fouling, erosion, corrosion, and leakage. Bearings and seals are
inspected for clearance and wear. All clearances are checked against their original values.
Inspection Intervals
It is important to develop a schedule of inspection intervals and maintenance procedures based on the
utilization ofthe equipmentand theexperience accumulatedduring itsoperation.A scheduledeveloped
in this manner wi ll result in minimum downtime and lowest overall maintenance costs.
Contact your GE Company representative for these intervals.
Special Inspections
Variable Inlet Guide Vanes Bushing Inspection
GE recommends the following procedure for inspection of inlet guide vanes for bushing wear:
Caution should be exercised to ensure that the inlet guide vane controls have been rendered inoper-
able during measurement and inspection. Failure to do so could result in injury to personnel.
With the gas turbine shut-down and the inlet guide vanes secured in the normally open position for
loaded operation (84 degrees in most instances), use a dial indicator to measure motion normal to
the vane chord. Position the indicator to read as close to the vane inner button as possible, then de-
flect the vane to both sides of the bushing clearance and record the full dial indicator reading. It is
importanttonotethatanyresidueintheclearanceareaberemovedpriortomeasuringbushingclear-
ances with the dial indicator.
Variable inlet guide vanes should be inspected for bushing wear according to a schedule as listed
in Table 1-1. Special attention should be paid to the clearance limits as defined in the table. If any
clearance measured is equal to or greater than that in the table, immediate action should be taken
to replace the bushing(s).
On units fitted with chemloy bushings (GE drawing numbers 315A9681 and 339A9913) that do not
exceed the wear limits specified, verify that the bushings are not loose in the inner segment holes.
Ifbushingsarelooseorfreeto turn,restakethesegmentstotightenthe bushingfit.Donotoverstake,
the inlet guide vanes should be free to actuate.
Customers should contact their local GE Power Generation Field Office for assistance in imple-
menting these new inspection procedures and ordering the new design bushings as necessary.

Introduction Inspection and Maintenance
I–6
Table 1-1. VIGV Bushing Inspection Schedule
Frame Size VIGV Bushing
Clearance Limits
for Bushing
Changeout (≥inches)
Inspection
Interval
(Hours)
MS5001, 5002, 6001 403 Stainless Steel 158A7888, P004,5,6 0.050 5,000
MS5001, 5002, 6001 403 Stainless Steel 315A9681 or 339A9913 0.050 8,000
MS5001, 5002, 6001 GTD 450 315A9681 or 339A9913 0.075 16,000
MS7001, 9001 403 Stainless Steel
403 Stainless Steel
GTD 450
158A7888
315A9681 (or 339A9913)
315A9681 or 339A9913
0.070
0.070
0.100
8,000
8,000
16,000
Parts
GE Power Systems maintains a large volume of replacement parts to cover the requirements of gas tur-
bine owners. The parts protection system is designed for rapid response; however, there are periods of
heavy demand where certain parts may not be readily available for planned inspections.
Itisstronglyrecommendedthathighprobabilitypartsbeavailableonsitepriortothe startofinspections.
Spare and Renewal Parts sales personnel have responsibility for customer contact, to advise scheduling
ofmaintenancepartsandidentifyadditional parts needs. Local Spare and Renewal Partssales personnel
canpresentoperationssparepartsrecommendationsandfactorindividualneedsintogasturbinemainte-
nancephilosophy aswell as toprovidefor planned maintenanceparts, including timetablesand making
suitable recommendations concerning design improvements and modifications to improve reliability,
maintainability orreduce operating cost.In additiongas turbineparts programssuch asinterchangeabil-
ity, exchange plan, warehousing program, and repair and return policy can be identified.