TM 9-2320-260-34-1
3-78. VALVE SEAT INSERTS MAINTENANCE
THIS TASK COVERS:
a. Removal
c. Cleaning
b. Gaging and Counterboring
d. Installation
INITIAL SETUP
APPLICABLE MODELS
MATERIALS/PARTS
Valve seat insert(s) (4 per cylinder head)
All
(Appendix D, Item 525)
TOOLS
Drycleaning solvent (Appendix C, Item 48)
General mechanic's tool kit
REFERENCES (TM)
(Appendix B, Item 1)
Valve seat insert tool (Appendix (B, Item 42)
TM 9-2320-260-34 P-1
Valve guide arbor (mandrel set)
EQUIPMENT CONDITION
(Appendix B, Item 44)
Disassemble cylinder head (para. 3-51).
Valve seat insert staking tool
(Appendix B, Item 45)
GENERAL SAFETY INSTRUCTIONS
Valve seat insert extractor
Keep fire extinguisher nearby when using
(Appendix B, Item 46)
drycleaning solvent,
Outside micrometer (Appendix B, Item 8)
Compressed air source will not exceed 30 psi
Inside micrometer (Appendix B, Item 9)
(207 kPa).
Depth micrometer (Appendix B, Item 16)
Eyeshields must be worn when cleaning with
Counterbore cutter (Appendix B, Item 43)
compressed air.
Tool driver (Appendix B, Item 61)
Wire brush (Appendix B, Item 71)
a. Removal
Using valve seat insert extractor, remove four valve seat inserts (2) from cylinder head (1). Discard valve
seat inserts (2).
