Repair Cylinder Head Group. (FIGURES 4-2 through 4-27)

TM 55-1905-223-24-4

4-8. Repair Cylinder Head Group. (FIGURES 4-2 through 4-27)

This task covers:

a. Disassembly,

b. Cleaning and Inspection,

c. Repair,

d. Assembly.

INITIAL SETUP

Tools

Equipment Condition

Tool kit, general mechanic's rail

Emergency generator set secured and

and marine diesel engines,

tagged "Out of Service"

(TM 55-1905-223-10.

Valve spring compression tester,

Cylinder head removed, (para. 2-40).

Combination wrench set, metric 10mm

thru 24mm 5120-01-046-4979

Lifting sling P/N 3375958

Measuring tool set, machinist's,

Set No. 6, 5280-00-278-9918

Valve spring compressor P/N ST-448

Materials/Parts

Compressed air

Nylon brush, Item 2, Appendix C

400 grit paper, Item 16, Appendix C

Crocus cloth, Item 6, Appendix C

Valve spring retainer P/N 3900299

Helical compression spring

P/N 3900276

Valve stem seal P/N 3901097

Engine poppet valve P/N 3802005

Valve collet P/N 3900250

Engine poppet valve P/N 3802006

Hot water

Detergent, Item 7, Appendix C

Wire brush, Item 22, Appendix C

Warning tags, Item 21, Appendix C

Lapping compound, Item 5, Appendix C

DISASSEMBLY

a. Mark valve seats that have been previously re-ground (FIGURE 4-2).

Change 1

4-6