TM-9-2320-260-34-1

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 1 OF 2

JULY 1994

TM-9-2320-260-34-1 - Page 271 of 657

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

All

TOOLS

General mechanic’s tool kit

(Appendix B, Item 1)

Valve seat insert tool (Appendix (B, Item 42)

Valve guide arbor (mandrel set)

(Appendix B, Item 44)

Valve seat insert staking tool

(Appendix B, Item 45)

Valve seat insert extractor

(Appendix B, Item 46)

Outside micrometer (Appendix B, Item 8)

Inside micrometer (Appendix B, Item 9)

Depth micrometer (Appendix B, Item 16)

Counterbore cutter (Appendix B, Item 43)

Tool driver (Appendix B, Item 61)

Wire brush (Appendix B, Item 71)

MATERIALS/PARTS

Valve seat insert(s) (4 per cylinder head)

(Appendix D, Item 525)

Drycleaning solvent (Appendix C, Item 48)

REFERENCES (TM)

TM 9-2320-260-34 P-1

EQUIPMENT CONDITION

Disassemble cylinder head (para. 3-51).

GENERAL SAFETY INSTRUCTIONS

l Keep fire extinguisher nearby when using

drycleaning solvent,

l Compressed air source will not exceed 30 psi

(207 kPa).

l Eyeshields must be worn when cleaning with

compressed air.

a. Removal

Using valve seat insert extractor, remove four valve seat inserts (2) from cylinder head (1). Discard valve

seat inserts (2).

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