CHAPTER 7. GEARBOX MODULE MAINTENANCE

TM 9-2835-255-34

CHAPTER 7

GEARBOX MODULE MAINTENANCE

CHAPTER INDEX

PROCEDURE

PAGE

Accessory Seal Assembly Replacement

7-1

Forward Engine Overhead Support Installation and Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-4

AGB Module Lifting Sling Installation and Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-5

Gearbox Module Removal from and Installation on Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-6

Accessory Gearbox Removal from and Installation in Shipping Container . . . . . . . . . . . . . . . . . . . . . . .

7-18

Front Angle Mounting Bracket Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-20

Accessory Gearbox Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-21

Gear Access Cover Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-24

Screw Thread Insert Replacement (Machine Thread Plug) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-25

Screw Thread Insert Replacement (Engine Electrical Motional Transducer/Speed Pickup No. 1 or 2)

7-28

Power Turbine Stator (PTS) Power Transformer Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-30

Inlet Guide Vane (IGV) Power Transformer Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-35

Direct Linear Valve Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-40

Accessory Gearbox Cleaning and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-46

Remove and Install Gearshaft Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-60

No. 3 Spur Gearshaft and Bearings Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-63

Accessory Gearbox Cover Plug Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-72

Accessory Gearbox (AGB) Cover Metal Seal Ring Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-85

ACCESSORY SEAL ASSEMBLY REPLACEMENT (Sheet 1 of 7)

TOOLS:

General mechanic's tool kit: automotive (SC5180-90-N26)

Gearbox seal puller (Item 39, Appendix D)

Inserted hammer face (Item 1, Appendix D)

Inserted hammer face holder (Item 2, Appendix D)

AGB dust seal installer (item 117, Appendix D)

AGB face seal installer (Item 124, Appendix D)

PERSONNEL: Two

SUPPLIES:

Adhesive sealer (Item 29, Appendix B)

Nonelectric wire (Item 15, Appendix B)

Plain encased seal (Item 53, Appendix E).

Preformed packing (Item 50, Appendix E)

Preformed packing (Item 51, Appendix E)

Retainer oil seal (Item 54, Appendix E)

Retaining ring (Item 158, Appendix E)

Seal, plain encased (Item 52, Appendix E)

Shortening compound (Item 20, Appendix B)

Go on to Sheet 2

Change 6

7-1