GE MS-6001B Maintenance Instructions Manual

GE Power Systems

Gas Turbine

Inspection and Maintenance Instructions

For MS-6001B Gas Turbines

With DLN-1 Combustion Systems

Gas Only

GEK 107048
Rev. 0 (11/98)

Gas Turbine Inspection and Maintenance — GEK 107048

THIS P AGE INTENTIONALLY LEFT BLANK.

I–2

NoteInspection and Maintenance

NEW FORMAT

The Combustion Inspection, Hot Gas Path Inspection and Major Inspection 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” preceding a figure or page number is used for the Disassembly section, an “I”
is used for the Inspection section, and an “R” is used for the Reassembly section.

Inspection and MaintenanceNote

THIS P AGE INTENTIONALLY LEFT BLANK.

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ST ANDARD 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of ContentsInspection and Maintenance — GEK 107048

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

i

Inspection and Maintenance — GEK 107048Table of Contents

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ii

Table of ContentsInspection and Maintenance — GEK 107048

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. . . . . . . . . . . . . . . . . . . . . . . . . . . .

iii

Inspection and Maintenance — GEK 107048Table of Contents

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv

Table of ContentsInspection and Maintenance — GEK 107048

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. . . . . . . . . . . . .

v

Inspection and Maintenance — GEK 107048Table of Contents

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vi

Notes, Cautions and WarningsInspection and Maintenance

NOTES, CAUTIONS AND WARNINGS

Notes, Cautions and Warnings will be found throughout this Maintenance Publication. It is important that the
significance of each is thoroughly understood by personnel using these Maintenance Procedures. Their defini­tions 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

This publication is designed to provide safe procedures and
processes for accomplishing the maintenance instructions
described herein. It is important, therefore, that the warn­ings, cautions, and notes in these procedures be thoroughly
understood and observed by the personnel performing
maintenance. Changes or additions deemed necessary for
proper maintenance and/or suggested safety improve­ments 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 for throughout the maintenance publication are in

S.A.E. units first, followed by metric (where applicable) in brackets [ ].

vii

Inspection and MaintenanceNotes, Cautions and Warnings

THIS P AGE INTENTIONALLY LEFT BLANK.

viii

INSERT

TAB

INTRODUCTION

Reformated, September 1991

GENERAL

Operation of the combustion gas turbine, as of any rotating power equipment, must include a planned pro­gram 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.To aid the user in becoming familiar with the unit by separating the inspections according to specific
systems and, where appropriate, describing briefly the reason for the inspection and the action to
be taken.

GE Power Systems

Gas Turbine

Introduction

2.To identify those components and parts that should be periodically examined between the initial
start-up tests and the designated inspection.

3.Inspection interva ls herein are based on engineer ing judgment and experience gaine d with gas turbine
units. The actual time interval esta blished for any partic ular gas turbine should be based on the use r’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 oper ating da ta including vibration rea dings should be taken and re cor ded for re fer ence . A re­cord of the inspections made , and the maintenance work pe rformed, will be most valuable in helping to estab­lish 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
for a particular mode of operation, and still maintain maximum availability and reliability of the unit.

Operating Factors Affecting Maintenance

Note:The effect of maintenance factors for fuel, starts and load duty are cu-

mulative if all the above factors are present. It should also be under­stood that as the maintenance factor increases the time between in­spections and components repairs decreases and it is possible that
component replacement frequency will increase.

Introduction
Rev. 0 (11/98) I–1

Introduction Inspection and Maintenance

The factors having the greatest influence on the life of parts for any given machine are shown in Fig­ure 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
require atomization, has the lowest level of radiant energy and will produce the longest life of parts.

Natural gas has been the tr aditional fuel for use with gas turbines. Due to the need to back up an inter­ruptible gas supply many gas turbines are dual fuel with a distillate fuel oil used as the alternate fuel.

Contaminants in the fuel also af fect maintenance intervals. This is particularly true for liquid fuels
in which dirt results in accelerated replacement of pumps, metering elements, and fuel nozzles. Con­taminants 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 requirements will demonstrate parts lives that are shorter than those for a simi­lar 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 rec­ognize 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 will vary with machines and specific operat­ing conditions. However, estimates are based on previous experience and can be very useful 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.

I–2

Inspection and Maintenance Introduction

It must be recognize d that the foregoing estimated outage requir ements can be used for estimating mainte­nance cycles, howeve r , these numbers will vary depe nding upon the many factors which establish the op­erating conditions for a specific installation. The inspection cycles wi l l vary depending upon fuel, duty
cycle and maintena nce philosophy of the owner. The inspection manhour s will vary depending upon pre­planning, 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, ei­ther new or previously repaired, that can be exchanged with existing parts. The exchanged parts can then
be repaired without extending the down-time.

T o 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 re­quirements 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”
and unit “shutdown” inspections. The running inspection is performed during start-up and while 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 inspec­tions 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, clean­ing relays, checking device settings and calibrations, lubrication and other general preventative mainte­nance 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
that the unit be operated at load for at least 1 hour bi-monthly, and data recorded. It is recommended 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.

Special inspections such as borescope and eddy current probe, can be used to further plan periodic main­tenance without interrupting availability. It is also recommended that visual inspections be performed
whenever there is personnel at the unit.

I–3

Introduction Inspection and Maintenance

Combustion Inspection

A brief shutdown inspection is required to change out fuel nozzles and to check the combustion lin­ers transition pieces and crossfire tubes. These parts require the most frequent attention, as contin­ued operation with a deteriorated combustion system can result in much shortened life of the down­stream parts, such as turbine nozzles and buckets. It is also inherent in the gas turbine design that
these parts are the first to require repair or replacement. Therefore, the importance of this inspection
in the maintenance program must be emphasized.

Figure 1-5 shows these components in relationship to one another.
A visual inspection of the leading edge of the first-stage turbine nozzle partitions and buckets should

be made during the combustion inspection to note any wear or deterioration of these parts. This in­spection 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 conve­nient.

After the combustion inspection is completed and the turbine has been returned to service, the re­moved 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. T o perform this inspection, the top
half of the turbine case (shell), and the first-stage nozzle must be removed. The second-stage nozzle,
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
under the technical direction of the GE Company Field Service Representative for accurate analysis
of inspection data and most effective use of outage time.

I–4

Inspection and Maintenance Introduction

Major Inspection

The Major Inspection involves inspection of all of the major “flange-to-flange” components of the
gas turbine which are subject to wear during normal turbine operation. This inspection includes ele­ments of the Combustion and Hot Gas Path inspections. In addition, casings are inspected for cracks
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 com­pressor 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 of the equipment and the experience accumulated during its operation. A schedule developed
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 de­flect the vane to both sides of the bushing clearance and record the full dial indicator reading. It is
important to note that any residue in the clearance area be removed prior to measuring bushing clear­ances 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.
If bushings are loose or free to turn, restake the segments to tighten the bushing fit. Do not overstake,
the inlet guide vanes should be free to actuate.

Customers should contact their local GE Power Generation Field Office for assistance in imple­menting these new inspection procedures and ordering the new design bushings as necessary.

I–5

Introduction Inspection and Maintenance

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

Parts

158A7888
315A9681 (or 339A9913)
315A9681 or 339A9913

0.070

0.070

0.100

8,000
8,000

16,000

GE Power Systems maintains a large volume of replacement parts to cover the requirements of gas tur­bine 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.

It is strongly recommended that high probability parts be available on site prior to the start of inspections.

Spare and Renewal Parts sales personnel have responsibility for customer contact, to advise scheduling
of maintenance parts and identify additional parts needs. Local Spare and Renewal Parts sales personnel
can present operations spare parts recommendations and factor individual needs into gas turbine mainte­nance philosophy as well as to provide for planned maintenance parts, including time tables and making
suitable recommendations concerning design improvements and modifications to improve reliability,
maintainability or reduce operating cost. In addition gas turbine parts programs such as interchangeabil­ity, exchange plan, warehousing program, and repair and return policy can be identified.

I–6

Inspection and Maintenance — GEK 107048 Introduction

• Type of Fuel

• Starting Frequency

• Load Cycle

• Environment

• Maintenance Practices

Figure 1-1. Parts Life-Factors

4

3

Maintenance Factor

2

1

0

Natural

Gas

Fuel Type

Figure 1-2. Effect of Fuel

I–7

Introduction Inspection and Maintenance — GEK 107048

5

4

3

Maintenance Factor

2

1

1/1000 1/100 1/10 1/1

Starts/Fired Hour

Figure 1-3. Effect of Starts

TYPE OF 8-HOUR

INSPECTION SHIFTS

Combustion 8

Hot Gas Path 12

Major 25

Assumptions

• No Repair Time — Replacement Only

• All Parts Available

• All Necessary Tools Available

• Crew With Average Trade Skill

• Flange-To-Flange Turbine Only

• Inspection Has Been Pre-Planned

Figure 1-4. Maintenance Inspections —

Model Series 6000 Estimated Outage Requirements.

I–8

Inspection and Maintenance — GEK 107048 Introduction

I–9

Air

Inlet

Compressor

Combustion

Turbine Exhaust

0901

1604

1314
1313

0546

1612 0812 0801

0811

0802

1301

1302

0803

0513

1214
1121

0703

0701

0804

0710

0702

1403

1401

1402

1409

0706 1502 1625

1319

Major Inspection

Hot Gas Path

Inspection

Combustion

Inspection

Figure 1-5. Types of Shutdown Inspections.

Introduction Inspection and Maintenance — GEK 107048

1. Set vanes to the full open position

2. Set up dial indicator to measure
motion normal to the vane cord.
Position the indicator to read as
close to the vane inner button as
possible.

3. Deflect vane in a tangential direc­tion (perpendicular to the air flow
direction) to both sides of the
bushing clearance and record full
dial indicator reading.

84°

VIGV in Fully
Open Position

Airflow
Direction

1

VIGV

Bushing

3

2

Dial Indicator

Figure 1-6. VIGV Bushing Wear Inspection Procedure

I–10

INSERT

TAB

STANDARD PRACTICES

Reformated, September 1991

GENERAL

At all times when performing work on a GE Gas Turbine the following general practices should be observed:

1.Keep complete records. In addition to specific inspection report forms called out, please complete
the general information requested on Forms PGS/GT-FF-6000, PGS/GT-FF-6026, and PGS/
GT-FF-6027. Refer to the Maintenance Inspection Forms section of this manual.

2.Remove and tag out electrical power from all systems/circuits upon which work is to be performed.

GE Power Systems

Gas Turbine

Standard Practices

3.Disable unit’s fire protection system and provide an alternate means of fire protection while this sys­tem is disabled.

**WARNING**

Fire suppressant, in a concentration sufficient to extin­guish fire, creates an atmosphere that will not support
life. It is extremely hazardous to enter the compart­ment after the CO
rendered unconscious by fire suppressant should be
rescued as quickly as possible and revived immediately
with artificial respiration or by mouth-to-mouth re­suscitation. The extent and type of safeguards and per­sonnel warnings that may be necessary must be de­signed to meet the particular requirements of each sit­uation. It is recommended that personnel be adequate­ly trained to cope with such an emergency.

4.Purge the turbine of potentially hazardous fumes, before opening casings, by operating the unit at
crank for 5 minutes, with all fuel shut off and purged. Use extreme care to isolate and vent gas fuel
systems.

system has discharged. Anyone

2

Standard Practices
Rev. 0 (11/98) SP–1

Standard Practices Inspection and Maintenance

5. Clean all removed parts, and fasteners and store in separate containers, tagged to simplify reassemb­ly. (See Gas Turbine Cleaning in this section for cleaning methods.)

6. Use penetrating oil prior to bolt removal. (Refer to recommended solvents, sealers, cleaners, etc.
in this section for listing of acceptable penetrating oils.)

7. Protect all casing flanges from rust and mechanical damage after removal. Grease, layout dye or
commercial rust inhibitors will retard flange rusting and plywood, masonite, or equal will prevent
mechanical damage.

8. Deburr mating surfaces and eliminate flange face high spots before assembling any casings. Carbo­rundum stones and flat mill files are effective for these tasks.

9. Cover all open pipe and tubing. Do not stuff rags in pipes. Sheet metal or plywood are effective cov­ers for large pipes and duct tape will protect tubing.

10. Never use pipe wrenches or pliers on tube fittings.

11. Do Not Reuse Gaskets — unless specifically instructed to do so in the procedures.

12. Do not reuse lockplates internal to the unit or those noted with a double asterisk (**). (Refer to the
Maintenance Parts Recommendations in this section.)

13. Match mark piping, fuel nozzles, couplings and casings to assist in proper orientation during reas­sembly.

14. Do not mark on any combustion system or turbine components with any compounds containing
lead. Carters Marks-A-Lot, black or blue, Dixon Company black or blue, Everhard Faber #7500 W a­ter Color , black, Dykem Company dark blue, Dykem DSL, light blue, Dykem DMP, high spot blue,
Dykem 107, Joseph Dixon lead free yellow lumber crayons, Wallace Pencil Company #800 black
marker , Machine Manufacturing Company Marco S-1141 black and Marco S-1141 white are rec­ommended and approved markers. Nickel base alloys are subject to attack when heated in the pres­ence of sulfur , lead and other metals. These materials can cause embrittlement and cracking at ele­vated temperatures. Some common sources of these compounds are paint, markers and machining
oil. Use of tags wired to the parts (avoid aluminum or other low melting point alloys), and markers
certified free of injurious materials can eliminate this source of contamination.

15. Observe the following general precautions when the unit is undergoing major inspection, mainte­nance checks and taking clearance readings.

a. Axial readings must be taken with the rotor positioned in contact with the active face of the

thrust bearing. Any pressure applied in moving the rotor should be released prior to taking rotor
position or clearance measurements.

b. Parallel bars and feeler stock, when used with proper attention to detail, provide good measure-

ments. In order to obtain proper measurement accuracy, the total thickness of the parallel bar
and feeler stock must be measured with a micrometer.

c. Snap gauges may be used to obtain measurements when proper attention is applied to the gauge

orientation. Snap gauges used on bevel surfaces will result in inaccurate readings.

SP–2

Inspection and Maintenance Standard Practices

d. The use of taper gauges is not recommended because the pointed end of the gauge often “bot-

toms” on an internal curved surface before an accurate reading can be obtained. This gauge
should not be used to take radial clearances.

e. Never rotate the unit rotor when the unit is undergoing inspection and maintenance checks with-

out adhering to the below listed precautions.

(1) Thrust bearing must be fully assembled in unit.
(2) Lubricant from unit lube system should be applied to journals.
(3) Check close clearance areas for potential interference and foreign object damage.
(4) Warn personnel working on unit.

16. To properly tighten new Swagelock stop-collar fittings, snug the nut by hand after cleaning threads.
Then tighten the nut until the stop-collar just stops turning.

17. Anti-Seize Compound

a. Anti-seize compound shall be applied on all rotor and stator bolting threads, dowels, rabbets

and sliding fits (internal and external).
External bolting threads for mounting associated equipment, pipe flanges, ductwork etc. Also

apply on vertical flange faces of the top halves of outer casings that may be subject to removal
for maintenance.

Note: This usage must be restricted to a thin film such that the compound

is not forced into the inner gas path. Should this occur, it must wher e
possible, be carefully removed.

b. Do not apply anti-seize compound to pipe threads or bolting thre ads internal to oil or water tanks.

18. Sealing Compound

a. Loctite Pipe Sealant with Teflon should be used on all pipe thread joints. The pipe thread must

be clean and free of fore ign material before applying the sealant. Follow instructions on container .

b. Loctite Pipe Sealant with Teflon is to be used on all threaded connections to cast iron castings,

after control filters, and in areas over 500°F.
Apply to the male threads so that the first thread is free of any compound.
When a fitting is removed, the female threads shall be cleaned to remove all loose particles of

compound.

19. Joint Compound

a. Joint compound shall not be used on machined joints except as follows:

(1) For compressor and turbine casings apply Perfect Seal only on the surface of horizontal joint

and only for a distance of one (1) inch on both sides of the four (4) way joint. The Perfect
Seal shall not be applied on the surface of the vertical joint.

SP–3

Standard Practices Inspection and Maintenance

(2) Instant Seal Locktite Plastic Gasket shall be used on all bolted oil to air joints (vertical and

horizontal) that are not gasketed and on plug openings. This includes, but is not limited to,
bearing housings, continuously lubricated coupling guards and stationary oil seals.

Instant Seal Locktite Plastic Gasket shall not be used on vertical joints of non-bolted stationary
oil seals.

b. Joint compound shall not be used on sheet metal joints except as follows:

(1) Gasket tape used between exhaust skin, or plenum joints shall be coated on both sides with

perfect seal.

(2) Silicone rubber adhesive sealant shall be used between non-gasketed joints of inlet hoods

or plenums. It shall be applied as a continuous bead of minimum of 0.25 wide and shall be
tangent to the outboard edges of the flange bolt holes.

20. Piping Flanges
a. Pipe flanges must not be forced into alignment. If flanges cannot be brought to within 1/8 in.

of parallel by hand, the piping should be reformed or replaced. When the flanges are parallel
with a new gasket in place, insert the bolts by hand. Do not pry on the flanges. Use anti-seize
compound on the bolts. Tighten the bolts in three stages on alternately opposite bolts.

21. Bolt and Stud Torquing
a. Before torquing, remove foreign matter from bolt, nut and bolting surfaces.
b. Apply anti-seize compound to bolt and nut threads and bearing surfaces.
c. Tighten bolt/or nut to be sure threads are free, then back off until free from surface. Snug against

surface and torque to values shown in Table 2-1.

d. When using impact wrenches, torque to values in Table 2-1. Item 21-C above does not apply

to impact wrenching.

22. Classification of Joints
a. All classes of joints (oil tight, air tight and for frame rigidity) with metal to metal contact shall

have their bolt or stud elongation determined by micrometer measurements, torque wrench or
by head rotation. See Table 2-1 and 2-2.

b. All gasket joints shall have their bolt and stud elongation determined by micrometer measure-

ments or torque wrench. See Tables 2-1 and 2-2.

c. To insure air tight joints there must be a 50% contact over the critical area. Burrs and high spots

must be removed before assembly.

d. To insure an oil tight joint, a line of continuous contact, with 0.25 in. minimum width, must be

maintained, in addition to 50% contact over the critical area. The 50% contact must be equally
distributed over the critical area. See Figure 2-1.

SP–4

Inspection and Maintenance Standard Practices

Table 2-1

Torque Values for Bolts and Studs

Bolt, Nut, and Stud Material Specified on GE Drawings

is Identified as Follows:

CR

L

GR8

SAE Gr. 8

B50A125E

B5F5B3 C1A5

NOM DIA

& THDS.

IN - LB FT - LB IN - LB FT - LB

#8–32 13–15 — 12–13 —

#10–32 17–19 — 15–17 —

0.250–20 60–72 — 48–60 —

0.375–10 204–228 — 164–186 —

0.500–13 492–552 — 392–447 —

0.625–11 815–912 — 720–816 —

0.750–11 1761–1980 147–165 1550–1775 129–147

0.875–9 — 200–222 — 170–200

1.00–8 — 348–395 — 300–348

1.25–8 — 648–732 — 564–648

1.50–8 — 1175–1320 — 1030–1175

OVER

1.50

ELONGATION PER INCH
OF EFFECTIVE LENGTH

0.0013–0.0015

Edge of Flange

Towards C of Machine

L

Outboard

Edge

SEE ELONGA TION

VALUES ON TABLE 2-2

Critical Area

Figure 2-1. Typical Flange Joint Makeup

SP–5

A

APPROX. THICK-

NESS OF JOINT “A”

1.50 0.0022–0.0017

2.00 0.0030–0.0023

2.50 0.0037–0.0030

3.00 0.0045–0.0035

3.50 0.0052–0.0040

4.00 0.0060–0.0046

4.50 0.0067–0.0052

5.00 0.0080–0.0058

5.50 0.0082–0.0064

6.00 0.0090–0.0070

6.50 0.100–0.0075

7.00 0.0105–0.0080

7.50 0.0110–0.0087

8.00 0.0120–0.0093

8.50 0.0130–0.0098

9.00 0.0135–0.0100

9.50 0.0140–0.0110

10.00 0.0150–0.0116

10.50 0.0157–0.0121

11.00 0.0166–0.0130

11.50 0.0177–0.0133

12.00 0.0189–0.0140

Bolt and Stud Elongation Values

A

ELONGATION OF

BOLT OR STUD AF-

TER TIGHTENING

Table 2-2

BOLT OR STUD IN
BLIND HOLE

ANGLE OF

ROT.

4°

8°
12°
16°
20°
39°
60°

Inspection and MaintenanceStandard Practices

A

ELONGATION

0.001

0.002

0.003

0.004

0.005

0.010

0.015

Bolt and Stud Elongation Values for B5F5B3
Bolts and Studs with Stress of 35,000 P.S.I., Min. to 45,000 P.S.I. Max.

SP-6






SAE Gr . 8



L




and C1A5





GR8





Standard PracticesInspection and Maintenance

RECOMMENDED SOL VENTS, SEALANTS AND CLEANERS

**WARNING**

Most solvents, sealants and cleaners are flammable at
elevated temperatures. Read and observe manufac­turer’s precautions on substance. Do not substitute
gasoline or unknown substances for the following rec­ommended items.

GE Company normally supplies lubricants, solvents, and sealants as part of the loose parts for turbine installa­tion. The listing below includes special items recommended for use during maintenance operations. All may
be procured locally or from the manufacturer.

NAME DESCRIPTION OR APPLICATION REFERENCE

Dux Seal Non-hardening adhesive plastic compound. 158A2557P1
Petrolatum Used on compartment door gaskets to prevent

sticking.

118A449P4
Atlantic Richfield,
Gulf Oil, Humble Oil

or equivalent.
RTV102 Adhesive Silicone rubber sealant white paste. GE Co.
RTV106 Adhesive Silicone rubber sealant. Good for high

GE Co.

temperature areas red paste.

Locktite Pipe Sealant

Used on all pipe thread joints. 118D5700

with Teflon
Locktite Plastic Gasket

Oil to air sealing joints. 226A1482P1

#47
Never Seeze Bolting antiseize compound, low temp. 248A5801
Perfect Seal Gasket sealing compound. K9692676
Contact Cement Exhaust system. 226A2449
Rubber Cement Heat exchanger head gaskets. 248A5557P1
Paint High temperature aluminum silicone. 262A3194P1
Paint Rust inhibitive beige primer. Water reducible 262A3195P1
Thinner 1500

High temperature aluminum paint. GE Co.

Alkyd Resin 05B7A

SP-7

NAME REFERENCEDESCRIPTION OR APPLICATION

Inspection and MaintenanceStandard Practices

Thinner Carboline 33 Exhaust system paint thinner for CarboZinc 11

Grey.

Carboline Co.
32 Hanley Ct.
St. Louis, Mo. 63122

Primer Carbo Zinc Grey Exhaust system paint. Carboline Co.

32 Hanley Ct.

St. Louis, Mo. 63122
Galvanizing Paint Unit walkways. 211A8426
Uniroyal Industrial

Apply on heat exchanger head gaskets. 248A5557P1
Adhesive Rubber
Cement #6128

Sealing Fiber Adaco Sealing fiber for use in electrical conduits. 256A1201P4
Adaco #1 Sealing

Sealing compound for use in electrical conduits. 256A1200P4
Compound

Adhesives Quick setting type suitable for outdoor

158A7228P1

environments.
3M2121 Strip Caulk Unit lagging, soft, nonhardening sealer. 156A1563P2 or P1
Moreland

Heavy grade adhesive paste. 239A5612P19
Chemical Co.
Sodium Silicote
Adhesive

Vimasco 136 Canvas lagging adhesive. 248A5660P1
Zyglo ZL22 Fluorescent penetrant, for crack check. From Magnaflux Corporation

(Chicago, Ill.)

Plus Gas Formula “A”
Dismantling Fluid

Penetrating oil. From Dockrell Agencies

(Scarborough, Ontario —
Canada)

WD-40 Penetrating oil. WD-40 Company

1061 Cudahy Place
San Diego, CA 92116

Kano “Kroil” Penetrating oil. From KANO Laboratories,

Inc. (Nashville, Tenn.)

Stoddard Solvent Cleaning solvent (petroleum spirits). Standard Oil of Ohio

Cleveland, OH 44115

Exxon Varsol I Cleaning solvent (petroleum spirits). Exxon Company

Pelham, NY 10803

Exxon Varsol 18 Cleaning solvent (petroleum spirits). Exxon Company

Pelham, NY 10803

SP-8

Standard PracticesInspection and Maintenance

NAME REFERENCEDESCRIPTION OR APPLICATION

Boron Fast Dry 3137 Cleaning solvent (petroleum spirits). Standard Oil of Ohio

Cleveland, OH 44115

Multicleaner No. 44 Cleaning solvent (petroleum spirits). Eastern Chemicals Co.,

Albany, NY

Turco Cold Spray Rust Inhibitor. Turco Products Co. Patterson,

NJ

Victaulic Lubricant
(Soap Base)

Heat Transfer
Compound,
Grade Z-80

Anti-Seize Compound, High Temperature

GE Company Design Engineering and Materials Engineering has evaluated Fel-Pro C-102, Nickel-Ease,
N5000 (Fel Pro products) and T eutonic Power Tool’ s 0505 as acceptable anti-seize compounds. Although
the four compounds listed above are recommended, use of any other anti-seize compounds is acceptable
provided they meet the guidelines given in Table 2-3.

A number of other commercially available compounds have been considered as replacements. However,
many have low melting point elements such as aluminum, copper, or cadmium added in quantities that
are detrimental to the mechanical properties of nickel and cobalt based alloys used in gas turbine parts
(Reference 1). Therefore, the use of anti-seize compounds that contain any of these added low melting
point elements is not recommended.

Used to lubricate Dresser type coupling pipe ends
and rubber seal lips inside and outside diameters.

Victaulic Co. of America
3100 Hamilton Blvd.
South Plainfield, NJ 07080

Used in VTR temperature regulating valve wells. 235A6987

Table 2-3. Anti-Seize Chemical Constituent Guidelines

Lead 25 ppm
Aluminum, Cadmium, Tin, Zinc, Silver,

Tellurium, Selenium, Antimony, Bismuth,
Mercury, Copper (present in the metallic state,
not as oxides or other compounds)

Element

Maximum Contents

300 ppm total; 100 ppm individual

SP-9

Inspection and MaintenanceStandard Practices

LUBRICATION GUIDANCE

Lubrication frequency will vary , depending on turbine operating hours and ambient temperature. It is therefore
suggested that the purchaser keep records of lubrication intervals to determine variances between periods
listed on the chart and those scheduled for a specific installation. Refer to vendor supplied component instruc­tion included in the System Description sections for maintenance lubrication requirements.

The lubricants listed do not exclude comparable products from other oil companies. Should the purchaser wish
to use an alternate lubricant not mentioned, or recommended by the component manufacturer , approval must
be requested from the component manufacturer , not the GE Company. The use of lubricant grades other than
those recommended, should be first approved by the GE Company.

**WARNING**

Motor shaft must be stationary when relubricating.

CAUTION

Bearing and grease must be kept free of dirt.

GAS TURBINE COMPRESSOR CLEANING

See GEI 41042 and GEK 28166 included in Water Wash System Tab.

CAUTION

Gas turbines operating with Dry Low Nox Combustion
Systems should not use solid compounds for compressor
cleaning.

SP-10

Standard PracticesInspection and Maintenance

TOOLS AND EQUIPMENT

The tools and equipment required to disassemble the gas turbine and repair it if necessar y are listed below. The
list of tools represent the typical quantities and kinds of tools that could be required for worst-case conditions.
The list may be modif ied as dictated by availa bility . The special tools re quired are provide d by the GE Company
and are itemized in a tool list in the Parts Volume of this Service Manual.

Standard Tools

Hydraulic Torque Wrench (Plarod Torquing System or equivalent)
Socket Sets

(1) 1-inch drive
(1) 3/4-inch drive
(2) 1/2-inch drive
(2) 3/8-inch drive

Socket Set (12 Point)

(2) 1/2-inch drive sockets 1 inch
(2) 1/2-inch drive sockets 1 1/8 inch
(2) 1-inch drive sockets 1 1/2 inch
(2) 1-inch drive sockets 1 7/8 inch

(2) 1-inch drive sockets 2 1/4 inch
1 set box wrenches — open end — to 2 inches
1 set box wrenches 12 point 1 1/8 inch to 2 1/4 inch
Slugging wrenches 2 each — 1 1/2, 1 7/8, 2 1/4 inches
Slugging wrenches 12 point 1 1/2, 1 7/8, 2 1/4 inches
Miscellaneous

(2) 6-inch adjustable wrenches

(2) 8-inch adjustable wrenches

(2) 10-inch adjustable wrenches

(2) 12-inch adjustable wrenches

(1) 16-inch adjustable wrench

(2) 8-inch pipe wrenches

(2) 12-inch pipe wrenches

(2) 16-inch pipe wrenches
2 sets Allen wrenches to 1 inch
1 set straight Allen wrenches to 1 inch
Miscellaneous screwdrivers, pliers, wire cutters, chisels, files, punches, snap-ring pliers
Torque wrenches 0–100, 0–300, 0–600 foot-pounds.
Hammers

(2) 1-pound ball-peen

(2) 2 1/2-pound ball-peen

SP-11

(1) 7-pound sledge

(1) 14-pound sledge
Mallet — plastic, rawhide
Pry bars

(2) 18-inch foot bars

(2) 6-foot pry bars
Carpenter’s level
Wood saw
2 Hacksaws with extra blades
Portapower — hydraulic jack set
(1) 10-foot measuring tape
Hand stones

4 coarse

4 fine

Inspection and MaintenanceStandard Practices

1 set of easy out (screw extractors)
1 set of taps and dies to 1 1/2 inches (1, 1-1/4, 1-1/2 x 8 thd)
Impact wrenches

(1) 1/2-inch drive with sockets

(2) 3/4-inch drive with sockets

(1) 1-inch drive with sockets
Electric or air drill with chuck to 1/2 inch with bits
(4) 50–foot air hoses with 1/2-inch “whips”
Air grinder with grinding wheels
Dial indicators

(1) Starrett “Last Word”

(1) Starrett Universal

(2) 0- to 1-inch indicator plus magnetic bases, arms and swivels
Micrometers

(1) 0–1 outside

(1) 0–8 outside (set)

(1) 2–8 inside (set)

(1) 0–6 depth
Feeler gauges

1 set 0.0015 to 0.030 12 inches long

2 sets 0.0015 to 0.030 4–6 inches long
1 Machinist’s level
1 Telescope gauge set

SP-12

(1) 12-inch and (1) 18-inch machinist’s scale
Mobile crane

50 tons at 25 feet radius — 45 feet high (71F unit RTR)
10 tons at 25 feet radius — 45 feet high from ground

(U.H. turbine casing)
Helicoil insertion tools
Engine-driven air compressor

90 psi with sufficient volume to drive impact wrenches
Oxyacetylene cutting outfit
Engine-driven welder
Chain hoists

(1) 10 ton

(1) 8 ton

(1) 3 ton
Comealong

(2) 1/2 ton

(2) 1-1/2 ton

(2) 3-1/2 ton

Standard PracticesInspection and Maintenance

Eyebolts

(8) 1/2-13 shouldered

(8) 5/8-11 shouldered

(8) 3/4-10 shouldered

(4) 1-8 shouldered

(2) 1-1/2 — 6 shouldered
Eyebolts, special

(4) 1/2 - 13 x 12 inches

(4) 5/8 - 11 x 12 inches
Shackles

(4) 3/16- inch pin

(4) 1/4-inch pin

(4) 3/8-inch pin

(4) 1/2-inch pin

(4) 3/4-inch pin
Slings — cables

(4) 3/8 x 12 feet

(4) 1/2 x 12 feet

(2) 3/4 x 30 feet

(2) 3/4 x 3 feet
Screw jacks (as required) 25-ton minimum capacity.

SP-13

Wood blocking

10 pieces 2 × 4 × 6 ft
10 pieces 4 × 4 × 6 ft

Inspection and MaintenanceStandard Practices

Rope

1

100 ft of
100 ft of

/2 in. diameter

3

/4 in. diameter

Expendables — See Recommended Solvents, Sealants, Cleaners, etc., in this section.

10 lb anti-seize
13 cans joint compound
3 rolls masking tape
6 rolls duct tape
14 marking pens, lead and sulfur free (Carter’s Marks-A-Lot or equivalent)—

see Standard Practices General Section.
100 wiping cloths
2 tubes Teflon thread sealant (liquid)
Barrel of solvent
Weather stripping glue

Miscellaneous items

100 ft work lights
Fire extinguishers
100 ft extension cords
Tote boxes
Ladders
Tie-on tags
Gloves
T ape writer
Nitrogen cylinder, regulator, gauge and hoses

SP-14

Standard PracticesInspection and Maintenance — GEK 107048

Special Tools — Typical for MS-6001B Gas Turbine with DLN-1

Note: Refer to the Tool Lists, line items A033 and 0104, in the Parts Volume

Service Manual for list of tools furnished for your unit(s).

Tool Name Application Quantity Figure

Guide Pin For Disassembly and Reassembly of Inlet

Casing

Guide Pin For Disassembly and Reassembly of

Compressor Casing

Guide Pin For Disassembly and Reassembly of Number

One Bearing

Guide Pin For Disassembly and Reassembly of Number

T wo Bearing

Guide Pin For Disassembly and Reassembly of Exhaust

Frame

Guide Pin For Disassembly and Reassembly of

Compressor Discharge Casing

Guide Pin For Disassembly and Reassembly of Turbine

Casing

Jacking Bolt For Jacking Number One Bearing, Forward

and Aft Compressor Casing (0.750-10 x

4.00)

Jacking Bolt For Jacking Compressor Discharge Casing

(1.50-8 x 5.00)

4 2-2

4 2-3

4 2-4

4 2-4

4 2-4

4 2-5

4 2-5

4 2-6

6 2-6

Jacking Bolt For Jacking Compressor Discharge Casing

6 2-6

(1.50-8 x 3.25)
Jacking Bolt For Jacking Turbine Casing (1.750-8 x 6.00) 4 2-6
Jacking Bolt For Jacking Turbine Casing (1.750-8 x 4.50) 4 2-6
Jacking Bolt For Jacking Turbine Exhaust Frame (1.00-8 x

4 2-6

2.50)

Jacking Rod Bearing For Number Two

4 2-7

Bearing Disassembly
Fixture Arrangement

Disassembly and

For Disassembly and Reassembly of Number

Two Bearing and Load Coupling

1 2-8

Reassembly
Wrench, Fuel Nozzle For Disassembly and Reassembly of Fuel

2 2-9

Nozzles
Tool, Alignment Pin For Aligning Outer Combustion Casing

1 2-10

During Assembly
Tool, Transition Piece

Go/No Gauge

Measure End Clearances Between Adjacent

Transition Pieces

1 2-11

SP-15

Tool Name FigureQuantityApplication

Inspection and Maintenance — GEK 107048Standard Practices

Tool, Transition Piece
Go/No — Go Gauge

Measure Transition Piece to First-Stage

Nozzle Retaining Ring clearances

1 2-12

Alignment Fixture For Aligning Accessory Gear to Turbine 1 2-13
Fuel Nozzle Staking Tool Stake Lockplate to Fuel Nozzle Body and

1 2-14

Outer Tip

Combustion Liner Puller For Removal of Combustion Liners From

1 2-15

Combustion Casing
Rail Fabrication Hoist For Turbine Casing Removal and Installation 1 2-16
Beam, Lifting For Turbine Casing and Exhaust Frame

1 2-17

Removal and Installation
Sling, Cable For Turbine Casing and Exhaust Frame

4 2-18

Removal and Installation
Hoist, Trolley Used With Hoist Rail Fabrication For Turbine

1 2-19
Casing and Exhaust Frame Removal and
Installation

Shackle, Anchor Used For Turbine Casing and Exhaust Frame

11 2-20

Removal and Installation

Hook, Clevis Foundry Used For Turbine Casing and Exhaust Frame

4 2-21

Removal and Installation

Ratchet, Gear
Come-Along

Link, Connection Used For Turbine Casing and Exhaust Frame

Used For Turbine Casing and Exhaust Frame

Removal and Installation

2 2-22

4 2-23
Removal and Installation

Hook, Clevis Grab Used For Turbine Casing and Exhaust Frame

2 2-24
Removal and Installation

Sling, Chain Used for Turbine Casing and Exhaust Frame

2 2-25
Removal and Installation

Rail Fabrication Hoist For Turbine Casing and Exhaust Frame

1 2-26

Removal and Installation

Pulley For Second and Third-Stage Nozzle Segment

3 2-27
Removal

Borescope Kit Used for Borescope Inspection on Gas

1 2-28
Turbine

Rail Channel Trolley Used in the Accessory Compartment for

1 2-29
Component Lifts

Beam Lifting Inlet Duct Used for Lifting Inlet Silencer 1 2-30
Beam Lifting Inlet Duct Used for Lifting Inlet Transition Piece 1 2-31
Beam Lifting Inlet Duct Used for Lifting Inlet Elbow Section 1 2-32

SP-16

Standard PracticesInspection and Maintenance — GEK 107048

Tool Name FigureQuantityApplication

Shackle, Anchor Used for Lifting Inlet Duct Components 4 2-33
Charging Hose Assembly

and Precharging Gauge

Used for Checking and Charging Hydraulic

Accumulators

Device
Plate, Flushing Assembly Used for Flushing Hydraulic Control Oil

Lines

Pliers, Hose Clamp
Atomizing Air

Used for Removing the Retaining Ring From

the Atomizing Air Compressor Quill Shaft

Compressor
Tool, Insertion and

Extraction

Used for Disassembly and Reassembly of

Cable Connections

Tubing, Plastic Used for Bleeding Air From Fuel System

Filters

Insert, Tubing Used with Plastic Tubing and Male

Connector

Connector, Tube Male Used to Connect Plastic Tubing and Insert to

Fuel System Filters

1 2-34

1 2-35

1 2-36

1 2-37

1 2-38

10 2-38

10 2-39

SP-17

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-2. Guide Pin Inlet Casing.

Figure 2-3. Guide Pin Compressor Casing.

SP-18

Standard PracticesInspection and Maintenance — GEK 107048

Figure 2-4. Guide Pin Bearings and Exhaust Frame.

Figure 2-5. Guide Pin Compressor Discharge and Turbine Casing.

SP-19

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-6. Typical Jacking Bolt, Unit Casings.

Figure 2-7. Jacking Rod, Number Two Bearing Disassembly.

SP-20

Standard PracticesInspection and Maintenance — GEK 107048

SP-21

Figure 2-8. Fixture Arrangement, Number Two Bearing and Coupling.

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-9. Fuel Nozzle Wrenches.

.750–10Unc 2A

.750–10Unc 2A

SP-22

Figure 2-10. Tool, Alignment Pin.

Approx.

10

Standard PracticesInspection and Maintenance — GEK 107048

0.53 0.36

0.200
Typ

1/2″

Figure 2-11. Tool, Transition Piece Side Clearance.

Approx. 5″

3/16″ thru Hole

1/2″

10″

.200 TYP.

.160″

.090″ 70°

Figure 2-12. Tool, Transition Piece, First Stage Nozzle.

SP-23

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-13. Alignment Fixture.

Figure 2-14. Staking Tool, Fuel Nozzle.

SP-24

Standard PracticesInspection and Maintenance — GEK 107048

Jacking Bolt
(typ. 3 plc’s)

Figure 2-15. Combustion Liner Puller.

SP-25

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-16. Rail Fabrication, Hoist.

SP-26

Figure 2-17. Lifting Beam.

Figure 2-18. Cable Sling.

Standard PracticesInspection and Maintenance — GEK 107048

Figure 2-19. Trolley Hoist.

SP-27

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-20. Typical Anchor Shackle.

Figure 2-21. Clevis Hook, Foundry.

SP-28

Standard PracticesInspection and Maintenance — GEK 107048

Figure 2-22. Ratchet Gear Come-Along.

Figure 2-23. Connection Link.

SP-29

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-24. Clevis Hook, Grab.

SP-30

Figure 2-25. Chain Sling.

Standard PracticesInspection and Maintenance — GEK 107048

SP-31

Figure 2-26. Rail Fabrication, Hoist.

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-27. Pulley Nozzle Segments.

SP-32

Standard PracticesInspection and Maintenance — GEK 107048

SP-33

Figure 2-28. Typical Borescope Kit.

Inspection and Maintenance — GEK 107048Standard Practices

SP-34

Figure 2-29. Rail Channel, Trolley.

Standard PracticesInspection and Maintenance — GEK 107048

SP-35

Figure 2-30. Lifting Beam, Inlet Silencer.

Inspection and Maintenance — GEK 107048Standard Practices

SP-36

Figure 2-31. Lifting Beam, Inlet Transition.

Standard PracticesInspection and Maintenance — GEK 107048

SP-37

Figure 2-32. Lifting Beam, Inlet Elbow.

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-33. Typical Anchor Shackle.

Figure 2-34. Typical Accumulator Charging Equipment.

SP-38

Standard PracticesInspection and Maintenance — GEK 107048

Figure 2-35. Flushing Block, Servo Valves.

Figure 2-36. Hose Clamp Pliers.

Figure 2-37. Insertion and Extraction Tool.

SP-39

Inspection and Maintenance — GEK 107048Standard Practices

Figure 2-38. Tubing, Insert and Male Connector.

SP-40

Standard PracticesInspection and Maintenance

ORDERING RENEW AL PARTS; REPAIR, AND REPLACEMENT PARTS

Spare and renewal parts orders for GE turbine parts should be placed with your GE Company Apparatus &
Engineering Services Operations office.

Those components identified in the Parts Volume of your Service Manual with a Proprietary Design statement
are considered critical in design, have an affect on unit longevity and may impair warranties. Therefore, re­placement of these components or parts within the assemblies must be monitored by the GE Company, who
may substitute improved designs.

When ordering parts for the turbine or associated equipment, refer to instructions provided in the Parts Volume.

RETURNING TURBINE PARTS FOR REPAIR/REPLACEMENT

It is important that you contact your GE Company Apparatus and Engineering Services Operations office for
assistance when returning turbine parts to GE. They can explain the proper procedures as well as supply the
required packing instructions, packing lists and shipping labels. They will also arrange to have a GE represen­tative confirm the receipt of your parts when they arrive and explain whatever corrective action the factory
recommends.

MAINTENANCE PARTS RECOMMENDATIONS

The primary objective of the typical recommended spare parts listings is to minimize turbine downtime during
scheduled maintenance. Your spare parts stock is the basis for a well-planned maintenance program.

Spare parts recommendations are provided to support scheduled combustion, hot gas path and major inspec­tions. To minimize downtime it is good maintenance practice to have the necessary parts on site prior to the
inspection. The gas turbine can then be shut down, parts removed, new or repaired parts installed and the unit
returned to service. The removed parts may then be inspected and a determination made if they can be repaired
for reuse at subsequent inspections.

These spare parts listings must be used in conjunction with the Parts V olume of the Service Manual. The model
list reference following each spare parts section heading, i.e., ML0512, 0701, 1214, etc., specifies the applica­ble tab in the Parts Volume, i.e., 5, 7, 12, etc. The specific drawing and part numbers required to support the
planned inspection can then be obtained.

Using the typical recommended spare parts list as a guide, your spare parts stock should be reviewed at a pre­inspection planning meeting. GE Company Spare and Renewal Parts personnel are available to participate in
your pre-inspection meetings to assist in planning your parts requirements for the scheduled inspection.

Note: A single asterisk (*) indicates not full quantities as called for on draw-

ings. Twenty percent (20%) of the quantities called for are listed. These
quantities should cover any hardware which may not be reusable.

Note: Double asterisks (**) indicate items are expendable (not to be reused).

They must be replaced at each inspection.

SP-41

Inspection and Maintenance — GEK 107048Standard Practices

MS-6001B DLN-1

Combustion Inspection

Recommended Spare Parts

Note: Refer to your Parts Volume Service Manual to obtain the proper draw-

ing and/or part number for the material listed under each arrangement
or assembly drawing.

Recommended

Quantity

PRIMARY FUEL NOZZLE ASSEMBLY (ML0513)

1. Tip Assembly (Gas) 50

**2. Lockplate (Tip Assembly to Body) 50

SECONDARY FUEL NOZZLE ASSEMBLY (ML0566)

1. Outer Gas Tip 10

**2. Lockplate (Outer Tip to Body) 10

3. Piston Ring 10

4. Spiral Wound Gasket (Flame Detector Flange) 10

5. Bolt, Hex Head (Flame Detector Flange) *8

COMBUSTION CHAMBER ARRANGEMENT (ML0701)

**1. Gasket (Cover to Outer Combustion Casing) 10

2. Gasket (Comb. Outer Casing to Compressor Discharge Casing) 10

3. Bolt, Twelve Point Head (Outer Casing to Compressor Discharge Casing) *40*

4. Flow Sleeve, Combustion 10

5. Steel Pan Head Machine Screw (Flow Sleeve Mounting Screws) *16*

6. Ring Packing (Crossfire Tube) 40

7. Bolt, Twelve Point (Nut, Packing Gland) *16*

8. Crossfire Tube Combustion (Male) 10

9. Crossfire Tube Combustion (Female) 10

10. Spring (Crossfire Tube Retainer) 20

SP-42

Standard PracticesInspection and Maintenance — GEK 107048

MS-6001B DLN-1 — Combustion Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

COMBUSTION CHAMBER ARRANGEMENT (ML0701) (Cont’d)

**11. Ring, Gasket (Secondary Fuel Nozzle Mounting Flange) 10

12. Bolt, Hex Head (Fuel Nozzle Flange) *16*
**13. Gasket, Pipe Flange (Flame Detector) 8
**14. Gasket, Spiral Wound (Spark Plug) 8

15. Bolt, 12 Point (Flame Detector) *4

16. Bolt, 12 Point (Spark Plug) *2

TRANSITION PIECE ARRANGEMENT COMBUSTION (ML0717)

1. Seal, Aft-Side, Combustion Transition Piece 10
**2. Bolt, Shoulder (Transition Piece Aft Mounting Bracket) 20
**3. Lockplate (Transition Piece Aft Mounting Bracket) 20
**4. Bolt, Shoulder (Transition Piece Forward Mounting Bracket) 20
**5. Lockplate (Transition Piece Forward Mounting Bracket, R.H.) 10
**6. Lockplate (Transition Piece Forward Mounting Bracket, L.H.) 10
**7. Lockplate (Transition Piece Seal Retainer) 10
**8. Bolt, Shoulder (Transition Piece Seal Retainer) 10

LINER ASSEMBLY COMBUSTION (ML0703)

1. Cap and Liner Assembly 10

TRANSITION PIECE ASSEMBLY, COMBUSTION (ML0702)

1. Transition Piece Assembly 10

CASING, COMBUSTION ARRANGEMENT (ML0719, 0708, 0701)

1. Outer Combustion Case, Cover Bolts *48*

SPARK PLUG ASSEMBLY (ML1214)

1. Igniter Assembly 1

2. Base Assembly (Spark Plug) 1
**3. Gasket 2

ULTRAVIOLET FLAME DETECTOR ASSEMBLY (ML1121)

1. Ultraviolet Flame Detector 2

SP-43

Inspection and Maintenance — GEK 107048Standard Practices

MS-6001B DLN-1 — Combustion Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

PIPING ARRANGEMENT PRIMARY FUEL GAS (ML0911) (If Applicable To Unit)

**1. Gasket (Gas Line Flange to Fuel Nozzle) 10
**2. Gasket (Gas Line Flange to Gas Manifold Flange) 10

3. Bolt, Hex Head (Fuel Nozzle and Gas Manifold Flange) *16*

4. Nut, Self Locking (Fuel Nozzle and Gas Manifold Flange) *16*

PIPING ARRANGEMENT (PRIMARY SECONDARY TRANS.) FUEL GAS — (SAME AS PRIMARY FOR
PARTS)

PIPING ARRANGEMENT COOLING AND SEALING AIR (ML0909)

Note: The list of gaskets, nuts, bolts and connectors male and female shown

below with varying quantities, indicate that there are different sizes re­quired. Using the applicable piping arrangement cooling and sealing
air piping arrangement drawing, the user should procure the gasketing
quantities shown and approximately 20% of the hardware quantities
shown to cover any hardware which may be reusable.

**1. Gasket 5
**2. Gasket 5
**3. Gasket 8
**4. Gasket 6
**5. Gasket 4

6. Locking Plate, Nut & Bolt *10*

7. Bolt, Hex Head (.500-13 x 2.25) *4

8. Bolt, Hex Head (.625-11 x 3.00) *15*

9. Bolt, Hex Head (.625-11 x 3.25) *8

10. Bolt, Hex Head (.750-10 x 3.75) *4

11. Bolt, Hex Head (.750-10 x 10.50) *8

12. Connector, Male 2

13. Connector, Male 1

SP-44

Standard PracticesInspection and Maintenance — GEK 107048

MS-6001B DLN-1 — Combustion Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

PIPING ARRANGEMENT COOLING AND SEALING AIR (ML0909) (Cont’d)

14. Connector, Male 2

15. Connector, Male 10

16. Connector, Tube Female 1

17. Elbow, Union 3

18. Elbow, Union 2

19. Elbow, Union 7

20. Union, Tube 2

21. Union, Tube 4

22. Union, Tube 7

23. Tee, Tube Union 2

24. Nut, Self Locking *5

25. Nut, Self Locking *6

26. Nut, Self Locking *6

THERMOCOUPLES, EXHAUST AND TRIP (ML0623)

1. Exhaust and Trip Thermocouples 16

RING RETAINING TURBINE NOZZLE FIRST STAGE (ML1401)

1. Insert, Wire Locking (Helicoil) 4

2. Insert, Wire Locking (Helicoil) 9

3. Wire, Insert (Helicoil) 30

4. Wire, Insert (Helicoil) 1

MS-6001B DLN-1

Hot Gas Path Inspection

Recommended Spare Parts

Note: Refer to your Parts Volume of this Service Manual to obtain the proper

drawing and/or part number for the material listed under each ar­rangement or assembly drawing.

PRIMARY FUEL NOZZLE ASSEMBLY (ML0513)

1. Tip Assembly (Gas) 50

Recommended

Quantity

SP-45

Inspection and Maintenance — GEK 107048Standard Practices

MS-6001B DLN-1 — Hot Gas Path Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

PRIMARY FUEL NOZZLE ASSEMBLY (ML0513) (Cont’d)

**2. Lockplate (Tip Assembly to Body) 50

SECONDARY FUEL NOZZLE ASSEMBLY (ML0566)

1. Outer Gas Tip 10

**2. Lockplate (Outer Tip to Body) 10

3. Piston Ring 10

4. Spiral Wound Gasket (Flame Detector Flange) 10

5. Bolt, Hex Head (Flame Detector Flange) *8

COMBUSTION CHAMBER ARRANGEMENT (ML0701)

**1. Gasket (Cover to Outer Combustion Casing) 10

2. Gasket (Comb. Outer Casing to Compressor Discharge Casing) 10

3. Bolt, Twelve Point Head (Outer Casing to Compressor Discharge Casing) *40*

4. Flow Sleeve, Combustion 10

5. Steel Pan Head Machine Screw (Flow Sleeve Mounting Screws) *16*

6. Ring Packing (Crossfire Tube) 40

7. Bolt, Twelve Point (Nut, Packing Gland) *16*

8. Crossfire Tube Combustion (Male) 10

9. Crossfire Tube Combustion (Female) 10

10. Spring (Crossfire Tube Retainer) 20

**11. Ring, Gasket (Secondary Fuel Nozzle Mounting Flange) 10

12. Bolt, Hex Head (Fuel Nozzle Flange) *16*
**13. Gasket, Pipe Flange (Flame Detector) 8
**14. Gasket, Spiral Wound (Spark Plug) 8

15. Bolt, 12 Point (Flame Detector) *4

16. Bolt, 12 Point (Spark Plug) *2

SP-46

Standard PracticesInspection and Maintenance — GEK 107048

MS-6001B DLN-1 — Hot Gas Path Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

TRANSITION PIECE ARRANGEMENT COMBUSTION (ML0717)

1. Seal, Aft-Side, Combustion Transition Piece 10
**2. Bolt, Shoulder (Transition Piece Aft Mounting Bracket) 20
**3. Lockplate (Transition Piece Aft Mounting Bracket) 20
**4. Bolt, Shoulder (Transition Piece Forward Mounting Bracket) 20
**5. Lockplate (Transition Piece Forward Mounting Bracket) 10
**6. Lockplate (Transition Piece Forward Mounting Bracket) 10
**7. Lockplate (Transition Piece Seal Retainer) 10
**8. Bolt, Shoulder (Transition Piece Seal Retainer) 10

LINER ASSEMBLY COMBUSTION (ML0703)

1. Cap and Liner Assembly 10

TRANSITION PIECE ASSEMBLY, COMBUSTION (ML0702)

1. Transition Piece Assembly 10

CASING, COMBUSTION ARRANGEMENT (ML0719, 0708, 0701)

1. Outer Combustion Case, Cover Bolts *48*

SPARK PLUG ASSEMBLY (ML1214)

1. Igniter Assembly 1

2. Base Assembly (Spark Plug) 1
**3. Gasket 2

ULTRAVIOLET FLAME DETECTOR ASSEMBLY (ML1121)

1. Ultraviolet Flame Detector 2

SP-47

Inspection and Maintenance — GEK 107048Standard Practices

MS-6001B DLN-1 — Hot Gas Path Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

PIPING ARRANGEMENT PRIMARY FUEL GAS (ML0911) (If Applicable To Unit)

**1. Gasket (Gas Line Flange to Fuel Nozzle) 10
**2. Gasket (Gas Line Flange to Gas Manifold Flange) 10

3. Bolt, Hex Head (Fuel Nozzle and Gas Manifold Flange) *16*

4. Nut, Self Locking (Fuel Nozzle and Gas Manifold Flange) *16*

PIPING ARRANGEMENT (PRIMARY SECONDARY TRANS.) FUEL GAS — (SAME AS PRIMARY FOR
PARTS)

PIPING ARRANGEMENT COOLING AND SEALING AIR (ML0909)

Note: The list of gaskets, nuts, bolts and connectors male and female shown

below with varying quantities, indicates that there are different sizes
required. Using the applicable piping arrangement cooling and sealing
air piping arrangement drawing, the user should procure the gasketing
quantities shown and approximately 20% of the hardware quantities
shown to cover any hardware which may not be reusable.

**1. Gasket 5
**2. Gasket 5
**3. Gasket 8
**4. Gasket 6
**5. Gasket 4

6. Locking Plate, Nut & Bolt *10*

7. Bolt, Hex Head (.500-13 x 2.25) *4

8. Bolt, Hex Head (.625-11 x 3.00) *15*

9. Bolt, Hex Head (.625-11 x 3.25) *8

10. Bolt, Hex Head (.750-10 x 3.75) *4

11. Bolt, Hex Head (.750-10 x 10.50) *8

12. Connector, Male 2

13. Connector, Male 1

14. Connector, Male 2

15. Connector, Male 10

16. Connector, Tube Female 1

17. Elbow, Union 3

18. Elbow, Union 2

19. Elbow, Union 7

SP-48

Standard PracticesInspection and Maintenance — GEK 107048

MS-6001B DLN-1 — Hot Gas Path Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

PIPING ARRANGEMENT COOLING AND SEALING AIR (ML0909) (Cont’d)

20. Union Tube 2

21. Union, Tube 4

22. Union, Tube 7

23. Tee, Union Tube 2

24. Nut, Self Locking *5

25. Nut, Self Locking *6

26. Nut, Self Locking *6

NOZZLE ARRANGEMENT, TURBINE FIRST STAGE (ML1401)

1. First Stage Nozzle Arrangement 1

RING RETAINING, TURBINE NOZZLE FIRST STAGE (ML1401)

1. Insert, Wire Locking (Helicoil) 4

2. Insert, Wire Locking (Helicoil) 9

3. Wire, Insert (Helicoil) 30

4. Wire, Insert (Helicoil) 1

SUPPORT RING ASSEMBLY FIRST STAGE NOZZLE (ML1403)

**1. Insert Wire Locking (Helicoil) 18

ENCLOSURE TO BASE ARRANGEMENT (ML1605)

1. Seal, Rubber Strip 2

2. Strip 1

3. Gasket, Silicone 1

4. Gasket, Dryback Adhesive 1

5. Gasket, Asbestos 1

6. Screw, Machine Round Head (#10-24 x 0.750) *5

7. Washer, Plain Regular (.375 Steel Plain Washer) *20*

8. Bolt, Hex Head (.375-16 x 3.50) *15*

9. Washer, Rubber *16*

10. Bolt, Hex Head (.375-16 x 2.50) *4

11. Lockwasher, Spring (.625 Steel Spring Lockwasher) *12*

12. Bolt, Hex Head (.625-11 x 2.00) *4

13. Nut, Hexagon (.625-11) *8

14. Bolt, Hex Head (.250-20 x 0.750) *8

BOLTING AND DOWELING ARRANGEMENT (ML1604)

1. Bolt, Twelve Point Head (Compressor Discharge Casing to Turbine Casing) *8

SP-49

Inspection and Maintenance — GEK 107048Standard Practices

MS-6001B DLN-1 — Hot Gas Path Inspection Recommended Spare Parts (Cont’d)

Recommended

BOLTING AND DOWELING ARRANGEMENT (ML1604) (Cont’d)

2. Nut, Twelve Point (Compressor Discharge Casing to Turbine Casing) Casing) *8

3. Bolt, Twelve Point Head (Turbine Casing to Exhaust Frame) *5

Note: The above quantities cover approximately 20% of the top half casings

bolting requirements only.

CASE MACHINING TURBINE (ML0705) (Turbine Casing Horizontal Flange Hardware)

1. Stud *1

2. Nut, Twelve Point *9

3. Bolt, Twelve Point *5

4. Bolt, Twelve Point *1

5. Stud, Body Bound *1

6. Stud *1

Quantity

7. Stud *1

PLENUM ASSEMBLY, EXHAUST (ML1625)

1. Bolt, Hex Head (.500-13 x 1.250) 28

2. Expansion Joint, Segment (Forward Section) 14

3. Gasket, Exhaust Plenum (Forward Section) 1

DUCT, TRANSITION EXHAUST (MLA042)

**1. Gasket, Forward Exhaust Transition Piece Removable Panel 1

THERMOCOUPLES, EXHAUST AND TRIP (ML0623)

1. Exhaust and Trip Thermocouples 16

MS-6001B DLN-1

Major Inspection

Recommended Spare Parts

Note: Refer to your Parts Volume of this Service Manual to obtain the proper

drawing and/or part number for the material listed under each ar­rangement or assembly drawing.

PRIMARY FUEL NOZZLE ASSEMBLY (ML0513)

1. Tip Assembly (Gas) 50

SP-50

Recommended

Quantity

Standard PracticesInspection and Maintenance — GEK 107048

MS-6001B DLN-1 — Major Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

PRIMARY FUEL NOZZLE ASSEMBLY (ML0513) (Cont’d)

**2. Lockplate (Tip Assembly to Body) 50

SECONDARY FUEL NOZZLE ASSEMBLY (ML0566)

1. Outer Gas Tip 10
**2. Lockplate (Outer Tip to Body) 10

3. Piston Ring 10

4. Spiral Wound Gasket (Flame Detector Flange) 10

5. Bolt, Hex Head (Flame Detector Flange) *8

COMBUSTION CHAMBER ARRANGEMENT (ML0701)

**1. Gasket (Cover to Outer Combustion Casing) 10

2. Gasket (Comb. Outer Casing to Compressor Discharge Casing) 10

3. Bolt, Twelve Point Head (Outer Casing to Compressor Discharge Casing) *40*

4. Flow Sleeve, Combustion 10

5. Steel Pan Head Machine Screw (Flow Sleeve Mounting Screws) *16*

6. Ring Packing (Crossfire Tube) 40

7. Bolt, Twelve Point (Nut, Packing Gland) *16*

8. Crossfire Tube Combustion (Male) 10

9. Crossfire Tube Combustion (Female) 10

10. Spring (Crossfire Tube Retainer) 20

**11. Ring, Gasket (Secondary Fuel Nozzle Mounting Flange) 10

12. Bolt, Hex Head (Fuel Nozzle Flange) *16*
**13. Gasket, Pipe Flange (Flame Detector) 8
**14. Gasket, Spiral Wound (Spark Plug) 8

15. Bolt, 12 Point (Flame Detector) *4

SP-51

Inspection and Maintenance — GEK 107048Standard Practices

MS-6001B DLN-1 — Major Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

COMBUSTION CHAMBER ARRANGEMENT (ML0701) (Cont’d)

16. Bolt, 12 Point (Spark Plug) *2

TRANSITION PIECE ARRANGEMENT COMBUSTION (ML0717)

1. Seal, Aft-Side, Combustion Transition Piece 10
**2. Bolt, Shoulder (Transition Piece Aft Mounting Bracket) 20
**3. Lockplate (Transition Piece Aft Mounting Bracket) 20
**4. Bolt, Shoulder (Transition Piece Forward Mounting Bracket) 20
**5. Lockplate (Transition Piece Forward Mounting Bracket) 10
**6. Lockplate (Transition Piece Forward Mounting Bracket) 10
**7. Lockplate (Transition Piece Seal Retainer) 10
**8. Bolt, Shoulder (Transition Piece Seal Retainer) 10

LINER ASSEMBLY COMBUSTION (ML0703)

1. Cap and Liner Assembly 10

TRANSITION PIECE ASSEMBLY, COMBUSTION (ML0702)

1. Transition Piece Assembly 10

CASING, COMBUSTION ARRANGEMENT (ML0719, 0708, 0701)

1. Outer Combustion Case, Cover Bolts *48*

SPARK PLUG ASSEMBLY (ML1214)

1. Igniter Assembly 1

2. Base Assembly (Spark Plug) 1
**3. Gasket 2

ULTRAVIOLET FLAME DETECTOR ASSEMBLY (ML1121)

1. Ultraviolet Flame Detector 2

SP-52

Standard PracticesInspection and Maintenance — GEK 107048

MS-6001B DLN-1 — Major Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

PIPING ARRANGEMENT PRIMARY FUEL GAS (ML0911) (If Applicable To Unit)

**1. Gasket (Gas Line Flange to Fuel Nozzle) 10
**2. Gasket (Gas Line Flange to Gas Manifold Flange) 10

3. Bolt, Hex Head (Fuel Nozzle and Gas Manifold Flange) *16*

4. Nut, Self Locking (Fuel Nozzle and Gas Manifold Flange) *16*

PIPING ARRANGEMENT (PRIMARY SECONDARY TRANS.) FUEL GAS — (SAME AS PRIMARY FOR
PARTS)

PIPING ARRANGEMENT COOLING & SEALING AIR (ML0909)

Note: The list of gaskets, nuts, bolts and connectors male and female shown

below with varying quantities, indicates that there are different sizes
required. Using the applicable piping arrangement cooling and sealing
air piping arrangement drawing, the user should procure the gasketing
quantities shown and approximately 20% of the hardware quantities
shown to cover any hardware which may not be reusable.

**1. Gasket 5
**2. Gasket 5

3. Gasket 8

4. Gasket 6

**5. Gasket 4

6. Locking Plate, Nut and Bolt *10*

7. Bolt, Hex Head (0.500-13 x 2.25) *4

8. Bolt, Hex Head (0.625-11 x 3.00) *15*

9. Bolt, Hex Head (0.625-11 x 3.25) *8

10. Bolt, Hex Head (0.750-10 x 3.75) *4

11. Bolt, Hex Head (0.750-10 x 10.50) *8

12. Connector, Male 2

13. Connector, Male 1

14. Connector, Male 2

15. Connector, Male 10

16. Connector, Tube Female 1

17. Elbow, Union 3

18. Elbow, Union 2

19. Elbow, Union 7

SP-53

Inspection and Maintenance — GEK 107048Standard Practices

MS-6001B DLN-1 — Major Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

PIPING ARRANGEMENT COOLING & SEALING AIR (ML0909) (Cont’d)

20. Union, Tube 2

21. Union, Tube 4

22. Union, Tube 7

23. Tee, Union Tube 2

24. Nut, Self Locking *5

25. Nut, Self Locking *6

26. Nut, Self Locking *6

NOZZLE ARRANGEMENT, TURBINE FIRST STAGE (ML1401)

1. First Stage Nozzle Arrangement 1

RING RETAINING, TURBINE NOZZLE FIRST STAGE (ML1401)

1. Insert, Wire Locking (Helicoil) 4

2. Insert, Wire Locking (Helicoil) 9

3. Wire, Insert (Helicoil) 30

4. Wire, Insert (Helicoil) 1

RING ASSEMBLY, SUPPORT FIRST STAGE NOZZLE (ML1403)

1. Support Ring First Stage 1

NOZZLE ARRANGEMENT, TURBINE SECOND STAGE (ML1402)

1. Second Stage Nozzle Arrangement 1

NOZZLE ARRANGEMENT, TURBINE THIRD STAGE (ML1409)

1. Third Stage Nozzle Arrangement 1

CASE ASSEMBLY COMPRESSOR INLET & NO. 1 BEARING (ML0801)

1. Liner Bearing No. 1 1

2. Oil Deflector No. 1 Bearing 1

3. Stationary Oil Seal Assembly 1

4. Forward Stationary Oil Seal 1

5. Air Seal Assembly 1

6. Pin, Shoulder, Headless 1

7. Screw, Flat Head (0.375–16 x 0.750) 2

8. Washer 2

9. Pin, Dowel 1

BEARING NO. 2 ASSEMBLY (ML1502)

1. Liner Bearing No. 2 1

SP-54

Standard PracticesInspection and Maintenance — GEK 107048

MS-6001B DLN-1 — Major Inspection Recommended Spare Parts (Cont’d)

Recommended

BEARING NO. 2 ASSEMBLY (ML1502) (Cont’d)

2. Deflector, forward Bearing No. 2 1

3. Seal, Stationary Oil, Bearing No. 2 1

4. Pin, Anti-Rotation, Seal 1

5. Pin, Anti-Rotation, Seal 2

6. Locking Plate 4

7. Locking Plate 4

BEARING THRUST, NO. 1 BEARING (ML1507)

1. Shim (Loaded Thrust Bearing) 1

2. Shim (Unloaded Thrust Bearing) 1

3. Bearing Thrust, No. 1 Bearing 1

4. Bearing, Loaded Thrust 1

Quantity

ROTOR ASSEMBLY, TURBINE (ML1305)

1. First Stage Buckets (Complete Set) 1

2. Pin Shank Seal, First Stage Buckets 92

3. Pin Seal, First Stage Buckets 92

4. Wire Lock, First Stage Buckets 1

5. Pin Shank Seal, Second Stage Buckets 92

6. Pin Platform Seal, Second Stage Buckets 92

7. Wire Lock, Second Stage Buckets 1

8. Pin Dowel, First & Second Stage Buckets (Wire Lock) 12

9. Pin Shank Seal, Third Stage Buckets 92

10. Pin Platform Seal, Third stage Buckets 92

11. Lock Twist, Third Stage Buckets 92

DUCTING AND PLENUM ARRANGEMENT INLET (ML1612, A041)

Note: The list of gaskets, nuts and bolts shown below with varying quantities,

indicates that there are different sizes required. Using the applicable
ducting and plenum arrangement inlet drawings, the user should pro­cure the gasketing quantities shown and approximately 20% of the
hardware quantities shown to cover any hardware which may not be
reusable.

1. Bolt, Hex Head (Plenum Arrangement) N22P25020 *30*

2. Washer, Plain (Plenum Arrangement) N402P43 *25*

3. Nut (Plenum Arrangement) N235P125 *25*

**4. Gasket, Duct (Plenum Arrangement) 1

SP-55

Inspection and Maintenance — GEK 107048Standard Practices

MS-6001B DLN-1 — Major Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

DUCTING AND PLENUM ARRANGEMENT INLET (ML1612, A041) (Cont’d)

**5. Gasket, Access Cover Plate (Plenum Arrangement) 4
**6. Gasket, Duct Inlet 1
**7. Gasket, Duct Inlet 1
**8. Gasket Duct Inlet 4
**9. Gasket Duct Inlet 2

10. Bolt, Hex Head N17P29028 *80*

11. Nut, Hex (.50–13) N205P29 *72*

12. Bolt, Hex Head N17P29036 *9

13. Washer, Plain Wide N402P75 *45*

DUCTING AND PLENUM ARRANGEMENT EXHAUST (ML1625, A042)

Note: The list of gaskets, nuts and bolts shown below with varying quantities,

indicates that there are different sizes required. Using the applicable
ducting and plenum arrangement exhaust drawings, the user should
procure the gasketing and the hardware quantities shown.

1. Insulation, Needlemat (Aft Side) Plenum AR

2. Expansion Joint Segment (Forward Side) Plenum 14

3. Clamp Segments, Expansion Joint Forward Side 14
**4. Gasket, Exhaust (Forward Side) Plenum 1

5. Bolt, Hex Head N14P29020 56

6. Expansion Joint Segment (Aft Side) Plenum 14

7. Clamp Segments, Expansion Joint Aft Side 14
**8. Gasket, Exhaust (Aft Side) Plenum 1

9. Nut, Hexagon (Exhaust Ducts To Exhaust Transition Piece) N227P35 *19*

10. Bolt, Hex Head (Transition Piece To Exhaust Plenum) N24P29028 *19*

11. Gasket (Transition Piece To Exhaust Plenum) 1

12. Cement, Contact (Transition Piece To Exhaust Plenum) AR

13. Bolt, Vertical Exhaust Removable Door Sides & Top, N24P33044 64

14. Nut, Vertical Exhaust Removable Door Sides & Top, N227P33 64

15. Washer, Vertical Exhaust Removable Door Sides & Top, N402P47 64

16. Bolt, Exhaust Plenum Removable Door, N22P25024 28

17. Nut, Exhaust Plenum Removable Door, 974A827P6 28

18. Washer, Exhaust Plenum Removable Door, N402P43 28

**19. Gasket, Exhaust Plenum Removable Door, 238A273P324 AR

SP-56

Standard PracticesInspection and Maintenance — GEK 107048

MS-6001B DLN-1 — Major Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

ENCLOSURE TO BASE ARRANGEMENT (ML1605)

Note: The list of gaskets, nuts and bolts shown below with varying quantities,

indicates that there are different sizes required. Using the applicable
enclosure to base arrangement drawing, the user should procure the
gasketing quantities shown and approximately 20% of the hardware
quantities shown to cover any hardware which may not be reusable.

**1. Gasket, Access Cover Plate 1

2. Seal, Rubber Strip 2

3. Strip 1

4. Seal, rubber Strip 1
**5. Gasket, Panel 1
**6. Gasket, Silicone 1
**7. Gasket, Dryback Adhesive 1
**8. Gasket, Asbestos 1

9. Cement AR

10. Caulking AR

11. Adhesive AR
**12. Gasket 56
**13. Gasket, Duct 1
**14. Gasket, Duct 1

15. Screw, Machine Round Head *5

16. Washer, Plain Regular *2

17. Bolt, Hex Head *2

18. Washer, Plain Regular *18*

19. Nut, Hexagon *3

20. Bolt, Hex Head *14*

21. Washer, Rubber *16*

22. Bolt, Hex Head *3

23. Bolt, Hex Head *8

24. Bolt, Hex Head *2

25. Bolt, Hex Head *12*

26. Washer, Plain Wide *12*

27. Washer, Flat *7

28. Washer, Plain Regular *7

29. Bolt, Hex Head *12*

SP-57

Inspection and Maintenance — GEK 107048Standard Practices

MS-6001B DLN-1 — Major Inspection Recommended Spare Parts (Cont’d)

Recommended

Quantity

ENCLOSURE TO BASE ARRANGEMENT (ML1605) (Cont’d)

30. Washer, Plain Wide *12*

31. Lockwasher, Spring *13*

32. Bolt, Hex Head *4

33. Nut, Hexagon *7

34. Bolt, Hex Head *6

35. Bolt, Hex Head *3

36. Washer, Plain Regular *2

37. Nut, Hexagon *2

38. Bolt, Hex Head *7

39. Washer *7

40. Bolt, Hex Head *3

41. Nut, Hexagon *2

42. Bolt, Hex Head *8

43. Bolt, Hex Head *3

44. Bolt, Hex Head *2

FRAME, ASSEMBLY EXHAUST (ML0706)

**1. Gasket AR

2. Bolt, Hex Head 18

3. Nut, Hex 18

CASE MACHINING TURBINE (ML0705) (Turbine Shell Horizontal Flange Hardware)

1. Stud *1

2. Nut, Twelve Point *9

3. Bolt, Twelve Point *5

4. Bolt, Twelve Point *1

5. Stud, Body Bound *1

6. Stud *1

7. Stud *1

BOLTING & DOWELING DRAWING (ML1604)

1. Bolt, Hex Head (Compressor Casing To Inlet Casing) *6

2. Bolt, Hex Head (Compressor Casing To Inlet Casing) *1

3. Bolt, Twelve Point Head (Compressor Casing To Discharge Casing) *5

4. Bolt, Twelve Point (Compressor Discharge Casing To Turbine Casing) *1

5. Bolt, Twelve Point (Compressor Discharge Casing To Turbine Casing) *8

SP-58

Standard PracticesInspection and Maintenance — GEK 107048

MS-6001B DLN-1 — Major Inspection Recommended Spare Parts (Cont’d)

Recommended

BOLTING & DOWELING DRAWING (ML1604) (Cont’d)

6. Nut, Twelve Point (Compressor Discharge Casing to Turbine Casing) *8

7. Bolt, Twelve Point (Turbine Casing to Exhaust Frame) *5

Note: The above quantities cover approximately 20% of the top half casings

bolting requirements only.

RADIATION SHIELD (ML0531)

1. Radiation Shield Thermocouples 16

THERMOCOUPLES, EXHAUST AND TRIP (ML0623)

1. Exhaust and Trip Thermocouples 16

Quantity

SP-59

Inspection and Maintenance — GEK 107048Standard Practices

THIS P AGE INTENTIONALLY LEFT BLANK.

SP-60

INSERT

TAB

AUXILIARY & CONTROLS

SYSTEMS MAINTENANCE

GE Power Systems

Gas Turbine

Auxiliary and Controls Systems Maintenance

CONTENTS (PERIODIC INSPECTION SCHEDULE)

General ACSM-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Standard Maintenance Items

Instrumentation ACSM-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Devices ACSM-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hydraulic/Mechanical Equipment ACSM-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heating, Cooling and Ventilation ACSM-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Motors, Motors and Pumps Couplings ACSM-4. . . . . . . . . . . . . . . . . . . . . . . . . . .

Unit Piping System ACSM-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Maintenance Items

Lube System ACSM-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Water System ACSM-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fuel Gas System ACSM-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High Pressure Control Oil System Hydraulic Supply ACSM-8. . . . . . . . . . . . . . . .

Inlet Guide Vane Control System ACSM-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cooling and Sealing Air System ACSM-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting System ACSM-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fire Protection ACSM-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SPEEDTRONIC Control ACSM-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Station Auxiliaries and Service ACSM-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Motor Control Center ACSM-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Generator ACSM-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Load Gear and Collector Compartments ACSM-12. . . . . . . . . . . . . . . . . . . . . . . . .

Inlet Systems (Turbine) ACSM-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Auxiliary & Controls Systems Maintenance
Rev. 0 (11/98) Index

Auxiliary and Controls Systems Maintenance Inspection and Maintenance

THIS P AGE INTENTIONALLY LEFT BLANK.

Reformated, September 1991

GENERAL

The maintenance procedures recommended in this section apply to a typical package power plant installation
and do not pertain to any particular plant equipment model.

This section is subdivided into two subsections: the Periodic Inspection Schedule followed by Inspection
and Maintenance Procedures. Although the subjects in each follow the same general order, not every item
listed in the Inspection Schedule is mentioned in the Maintenance Procedures. Only those items which re­quire special care, or which are not covered by manufacturer’s instructions, are covered in the text portion.

GE Power Systems

Gas Turbine

Auxiliary and Controls

Systems Maintenance

Standard maintenance items, such as gauges, switches, valves, filters, etc., have been grouped under one
heading in each subsection. Following this, the items have been grouped by system and major equipment
categories.

In the Periodic Inspection Schedule, the “Inspect” column lists all the systems, components and devices on
the gas turbine and generator that require inspection. In the “What to Inspect For” column, particular points
of each item of inspection are listed as possible defective conditions that should be looked for and corrected.

For temperature and pressure settings, flow rates, calibration data, etc., plus detailed information on the in­spection and maintenance of any device listed herein, the reader should also refer to the following documents
in this Service Manual:

1.Schematic Piping Diagram

2.Diagram Device Summary

3.Control Specifications

4.Equipment Publications

The “Inspection Frequencies and Turbine Status” column specifies, by means of abbreviations, how often
a device or assembly should be inspected and whether or not the turbine can be operating at the time of inspec­tion. The left-hand letter(s) designate the frequency and the right specifies the turbine status. Following is
a list of abbreviations used:

Auxiliary & Controls Systems Maintenance
Rev. 0 (11/98) ACSM–1

Auxiliary and Controls Systems Maintenance Inspection and Maintenance

D — Daily Inspection
W — Weekly Inspection
M — Monthly Inspection
Q — Quarterly Inspection
SA — Semiannual Inspection
CI — Combustion Inspection
A — Annual Inspection
HGP — Hot Gas Path Inspection
Maj — Major Overhaul Inspection
Yrs. — Years
O — Turbine Operating
S — Turbine Shutdown

The recommended inspection frequencies and turbine statuses, specified in this column, are representative
of an average power plant installation and include both peaking and continuous operating stations. They are
not intended to cover all variations of equipment supplied and may depend upon station environment. (In
some cases, a shutdown may be recommended solely as a precaution against possible injury to maintenance
personnel, because the location of the component or device is in a hazardous area.)

The “Reference” column, in the Inspection Schedule, refers to those pages in the text which provide detailed
inspection information on the device, assembly , or system under inspection. This column also refers to publi­cations, issued by the GE Company which supplement the information in the text. These publications can
be found under the system tabs in the Service Manual.

It is our intent that these instructions, with the help of a GE Field Service Representative, be used as an aid
in the preparation of an individual maintenance program for each purchaser.

PERIODIC INSPECTION SCHEDULE

Inspection
Frequency and

Inspection What to Inspect for
STANDARD MAINTENANCE ITEMS

INSTRUMENTATION

Turbine Status

Pressure Switches
and Gauges Damage

Reading in Error
Calibration

D — O
D — O

A — S

Thermometers
(Dial Type) Damage

Reading in Error
Calibration

D — O
D — O

A — S

Flowmeters

Leaking Seams and Joints
Calibration

D — O

A — S

Document
or Page
Reference

IMP–1

IMP–1

IMP–1

ACSM–2

Inspection and Maintenance Auxiliary and Controls Systems Maintenance

Inspection

Vibration Detectors

Stable Reading
Mounting Secure

Liquid Level Indicators

Reading in Error
High and Low Actuation Point

Panel Meters

Damage
Zero Reading
Calibration

CONTROL DEVICES

Temperature Switches

Calibration Pickup and
Dropout Setting A — S

Thermostats

Calibration Setting A — S

Pressure Regulating Valves
(VPR’s) Packing Leakage

Incorrect Setting

Inspection
Frequency and
Turbine StatusWhat to Inspect for

D — O

A — S

D — O

A — S

D — O
M — S

A — S

M — O
D — O

Document
or Page
Reference

IMP–1

IMP–2

IMP–2

IMP–2

IMP–2

IMP–2

T emperature Regulating
Valves (VTR’s) Packing Leakage

Incorrect Setting

HYDRAULIC/MECHANICAL EQUIPMENT

Relief Valves

Chattering and Leakage
Settings

Solenoid Valves

Leakage
Proper Operation

Servovalves

Verify proper torque (17–19 inch
pounds)

Orifices

Erosion or Corrosion
Plugging, Orifice Deterioration
Sharp Edges or Irregular Chamfer

Check Valves

Leakage
Corrosion

IMP–3

M — O
D — O

IMP–4

M — O

A — S

IMP–4

M — O

A — S

IMP–4

A — S

IMP–4

A — S
A — S
A — S

IMP–4

SA — S

3 Yrs. — S

ACSM–3

Auxiliary and Controls Systems Maintenance Inspection and Maintenance

Inspection

Strainers,
Gas/Liquid

Dirt, Scale

Filters, Lube and Fuel

15 psi (1.03 bars) Maximum P
Leaking Seams and Joints
Dirty Element

Hydraulic Supply Filter

60 psi (4.14 bars) Maximum P
Leaking Seams and Joints
Dirty Element

Air Filters
(Air Extraction Valve) Moisture Accumulation

Dirty Filter

HEATING COOLING AND VENTILATION

Air Conditioners

Dirty Filter
Improper Thermostat Setting
Dirty Condenser Coil

Inspection
Frequency and
Turbine StatusWhat to Inspect for

SA — S

D — O

M — O

SA — S or

As Required

D — O

M — O

SA — S

M — O

SA — S

W — O/S
W — O/S

A — O/S

Document
or Page
Reference

IMP–4

IMP–5

IMP–6

IMP–6

Space Heaters

Improper Operation
Dirty Heating Elements, Blades and

Louvers
Improper Thermostat Setting

Accessory and Turbine
Compartment Vent Fans Excessive Fan Wheel Wear

Vibration
Cleanliness
Mounting Security of Hardware etc.

MOTORS, MOTORS AND PUMP COUPLINGS

Motors

Excessive Vibration
Dirty Louvers and Screens
Loose Mounting Bolts and Electrical

Connections
Dirty Windings, Collector Rings,

Commutator, Brush Rigging
Brush Condition

IMP–6

A — O

A — S

A — O

IMP–6

A — S

A — O

A — S
A — S

IMP–6

A — O
A — O

A — S

A — S
A — S

ACSM–4

Inspection and Maintenance Auxiliary and Controls Systems Maintenance

Inspection

Motor and Pump Couplings

Loose Bolts and Grease Plugs
Evidence of Wear

UNIT PIPING SYSTEMS

(Fuel, Oil, Air, Water) Piping
and Valves Leakage

Loose Hardware, Hangers and Clamps
Broken Supports
Vibration
Improper Valve Operation
Loose Valve Packing

SYSTEMS MAINTENANCE ITEMS

LUBE SYSTEM

Lube Oil Pumps

Excessive Noise
Wear Ring Clearance
Thrust Bearing Wear
Bearing Seal Wear

Inspection
Frequency and
Turbine StatusWhat to Inspect for

A — S
A — S

D — O

M — O
M — O
M — O
M — O
M — O

M — O
Maj — S
Maj — S
Maj — S

Document
or Page
Reference

IMP–7

IMP–7

IMP–7

Lube Oil Tank

Lube Oil Properties

Heat Exchangers

Lube Oil Immersion Heaters

Peeling Paint
Loose Hardware, Fittings on Internal

Piping and Tubing
Loose or Missing Hardware on Pipe

Hangers and Clamps
Loose Hardware at Pump Intakes
Presence of Sludge and Unusual

Foreign Matter in Bottom of Tank

Irregular Physical Properties of
Lubricant Sample Taken from Tanks
and Presence of Contaminants

Improper Operation
Leakage
Contaminated Water
Plugging of Leaking Tubes

Improper Operation

IMP–7

A — S

Maj — S

Maj — S
Maj — S

Maj — S

IMP–7

M — S/O

IMP–7

M — O

M — O

M — O

3 Yrs. — S

IMP–8

M — O

ACSM–5

Auxiliary and Controls Systems Maintenance Inspection and Maintenance

Inspection

Mist Eliminator
(If Applicable)

Excessive Pressure Drop
Across Unit

Oil Vapor Leakage
Dirty Filter Element
Condition of Filter Element

Fiber Bed

Mist Eliminator Fan
(If Applicable) Dirty Fan Housing

Loose Mounting Bolts
Excessive Vibration Noise

Pipe Couplings

Oil Leakage/Hardware Security
Seal Brittleness

WATER SYSTEM (if applicable)

Cooling System Checks

System Fouled with Contaminants
Improper Water Flow
Incorrect Flow Versus Pressure Drop

Inspection
Frequency and
Turbine StatusWhat to Inspect for

M — O
M — O
M — O

M — O

M — O
M — O
M — O

D — O

A — S

Maj — S

Maj — O

Maj — S

Document
or Page
Reference

IMP–8

IMP–9

IMP–9

IMP–9

Water Tank

Evidence of Tank Leakage
Improper Pressure Cap Setting
Poor Condition of Cap Gasket and

Gasket Surface
Damaged Filler Neck
Dirt Inside Tank
Corrosion Inhibition

Radiator Header
Assemblies Leaking Seams and Joints

Corrosion and Erosion of Fins
and Tubes

Damaged Parts
Cleanliness

Anti-Freeze Protection

Improper Concentration

IMP–10

A — S

3 Yrs. — S

M — O

A — S
A — S
Q — S

(Or Every Water

Addition)

IMP–8

M — O

M — O
M — O

A — S

A — S

ACSM–6

Inspection and Maintenance Auxiliary and Controls Systems Maintenance

Inspection

Cooling Water Radiator Fan
Module

Cooling Water Pump

FALSE START DRAIN VALVE

False Start Drain Valve

Dirty Wheel Housing, Ducts and
Screens

Excessive Vibration Noise
Damaged Blades
Loose Mounting Bolts
Air Flow Obstructed
Rust, Corrosion and Peeling

Leakage Shaft Seal
Dirty Shaft Seal Cooling Water Line

and Filter Element
Excessive W ear Ring Clearance
Excessive Mechanical Seal Wear

Incorrect Sequencing During Startup
and Shutdown

Improper Operation of Valve Actuator
Air and Oil Leaks
Worn Diaphragm in Valve Actuator

Inspection
Frequency and
Turbine StatusWhat to Inspect for

A — S

A — O

A — S
A — S
A — S
A — S

M — O

A — S
Maj — S
Maj — S

A — O
A — O
D — O

A — S

Document
or Page
Reference

IMP–11

IMP–11

IMP–12

SPEEDTRONIC
Control Loop Flow Unstable, Hot Starts,

Overtemperature
Calibration FSR Versus Fuel Flow

LVDTs
Electronic Trip Actuation of 20FL and

20HD
Check 20FL for Proper Null Bias
LVDT Feedback at Firing Speed

Versus FSR

D — O

A — S

SA — S
SA — S

A — O

Control
Specification–
Operating
Instructions and
Sequences and
Control
Specification–
Control System
Adjustments

ACSM–7

Auxiliary and Controls Systems Maintenance Inspection and Maintenance

Inspection

FUEL GAS SYSTEM (if applicable)

Gas Control Valve

Gas Leakage at Stem, Packing Leak
Off or Vent

Hydraulic Cylinder Rod Seal Leakage
Rough Operation
Improper Operation of Trip Relay
Damage Control Surfaces of Valve

Plug and Seat
Trip Action with Loss of Hydraulic

Trip Oil

SPEEDTRONIC
Control Loop Valve Unstable, Slow Movement,

Stroke Out of Specification, P2 in Error

Calibration, FCR Versus Stroke, Gas
Control Valve

Speed Versus P2 Speed Ratio Valve, P2
Transducer Calibration, LVDTs
Calibration

Electronic Trip action of 20FG
and 20 HD

Check 20FG for Proper Null Bias

Inspection
Frequency and
Turbine StatusWhat to Inspect for

M — O

M — O
SA — S
SA — S

Maj — S

SA — S

D — O

A — S

A — S
SA — S
SA — S

Document
or Page
Reference

IMP–13

Control
Specification,
Control
Specification–
Operating
Instructions and
Sequences and
Control
Specification–
Control System
Adjustments

HIGH PRESSURE CONTROL OIL SYSTEM HYDRAULIC SUPPLY

Main Hydraulic Supply
Pump Excessive Vibration or Unusual Noise

Improper Discharge Pressure
Relief Valve Leaking
Leakage at Shaft and Mounting

Flanges

Auxiliary Hydraulic Supply
Pump Low Discharge Pressure

Leakage Around Shaft and Mounting
Flanges

Excessive Vibration or Unusual Noise

Hydraulic Supply Manifold

Connections Loose or Leaking

Air Bleed Valves

Improper Air Bleed Valve Operation

IMP–13

M — O

D — O
A — O

M — O

IMP–13

A — S

M — O
M — O

IMP–13

A — S

IMP–14

A — S

ACSM–8

Inspection and Maintenance Auxiliary and Controls Systems Maintenance

Inspection

Accumulator

Precharge Pressure
Accumulator Safety Disc

Hydraulic System Piping

Leaking Pipe Connections
(All Other Units)

INLET GUIDE VANE CONTROL SYSTEM

Operation and Calibration

Inlet Guide Vanes Proper Operation
Calibration
20TV Trip Servo Valve for Proper

Operation
Check Trip Action of Inlet Guide

Vanes with Loss of Hydraulic Trip Oil
Check Operation and Sequencing of

Compressor Bleed Valves
Leakage in the System

Inspection
Frequency and
Turbine StatusWhat to Inspect for

A — S
A — S

HGP — S

D — O

A — S
A — S

SA — S

SA — S

M — O

Document
or Page
Reference

IMP–14

Control
Specification,
Control
Specification–
Operating
Instructions and
Sequences and
Control
Specification–
Control System
Adjustments

COOLING AND SEALING AIR SYSTEM

Piping

Orifice Plates
Orifice Unions
Leakage
Loose Hardware, Hangers and Clamps
Vibration

Compressor Bleed Valve

Sluggish Movement Open/Close
Leakage

Compressor Discharge
Pressure Transmitter Calibration

STARTING SYSTEM

Starting Diesel (if applicable)

See Vendor’s Preventive Maintenance
Procedure in Starting System Tab,
Volume II

Starting Motor

See Vendor’s Preventive Maintenance
Procedure in Starting System Tab,
Volume II

IMP–14

A — S

A — S
D — O
M — O
M — O

IMP–14

SA — S

M — O

IMP–15

A — S

90 Starts or

Once per Year

ACSM–9

Auxiliary and Controls Systems Maintenance Inspection and Maintenance

Inspection

Starting Clutch

Improper Clearance of Clutch Jaws at
Engaged and Disengaged Positions

Improper Operation of Limit Switch
Worn Clutch Jaws

T orque Converter

External Oil Leaks at Shaft Seals,
Bolted Flanges, Cover Plates

Tubing Connections and
Hydraulic Hoses Leakage, Wear, Chafing and Abrasions

Ratchet System

Oil Leakage
Dirt in Commutator
Faulty Pump

Accessory Gear Train

Gears Pitted, Scored, Galled
Broken Teeth and Gear Wear

Inspection
Frequency and
Turbine StatusWhat to Inspect for

SA — S

SA — S

A — S

D — O

Q — O

D — O

A — S
A — S

A — S

Maj — S

Document
or Page
Reference

IMP–16

IMP–16

IMP–16

FIRE PROTECTION SYSTEM

System Package Lagging

Leakage at Lagging
Open Joints Between Bases, Roof

Joints and Door Fits
Pilot Operated Cylinders Show

Improper Pressure at Gauges

High Pressure System

Ventilation Dampers Operate Freely
and are not Obstructed

High Pressure Storage
Cylinders Loss of Cylinder Weight

Fire Detectors

Improper Operation

High Pressure System
Solenoid Pilot Valve and
“Puff” Tests Verification of Proper Operation of

System
Ventilation Dampers Operate Freely

and are not Obstructed

Low Pressure (if applicable)
CO

System Electric Release

2

and “Puff” Tests Verification of Proper Operation of

System

IMP–21

A — S

A — S

A — S

IMP–21

A — S

IMP–21

SA — S

IMP–21

A — S

IMP–22

A — S

A — S

IMP–22

A — S

ACSM–10