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TM 10-4320-343-14
6.6.2 Cylinder Head Repair.
This task covers:
6.6.2.1 Disassembly
6 .6 . 2 . 3 A s s e m b ly
6 .6 . 2 . 2 R e p a i r
INITIAL SETUP
Tools
General Mechanic’s Tool Kit (appendix B,
Section III, Item 1)
Drill (appendix B, Section III, Item 3)
Micrometer (appendix B, Section III,
Item 3)
Valve Spring Compressor (appendix B,
Section III, Item 15)
Cutting Device (appendix B, Section III,
Item 16)
Reemer (appendix B, Section I II, Item 17)
Mandrel (Intake) (appendix B, Section III,
Item 18)
Mandrel (Exhaust) (appendix B, Section III,
Item 19
Mandrel (appendix B, Section III, Item, 20)
Cutter (appendix B, Section III, Item, 21)
Pilot Pin (appendix B, Section III,
Item 22)
Material/Parts
Valve seats (TM 10-4320-343-24P)
Equipment Conditions
Engine disassembled, paragraph 6.6.4.
General Safety Instructions
Do not touch cylinder head while it is
hot without protective gloves.
DO not work on equipment without
following standard shop safety
precautions.
6.6.2.1 Disassembly.
a.
b .
c .
d.
e.
Install cylinder head (figure 6-2, 1) in clamping stand.
Using valve spring compressor, disassemble as follows:
(1) Remove two tapered valve spring keepers (2).
(2) Remove two spring caps (3).
(3) Remove two springs (4).
Remove one valve rotor or spring seat (5).
Remove valves (6 and 7) from cylinder head (1).
Remove two locating rings (8) and valve guides (9).
6.6.2.2 Repair.
a .
Inspect cylinder head parts for obvious defects.
Replace defective parts.
b.
Using a micrometer measure valve springs (4) length.
Minimum length is 2.204
inch (56 mm).
Replace if less than minimum length.
c .
Inspect valves (6) and (7) for cracks and pits.
Replace valves if required
and inspect to the tolerances specified in table 6-1.
d .
Inspect cylinder head (1) for external damage.
Replace if damaged.
6-11
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