TM 5-4310-387-14
5-29. Engine Cylinder Head Assembly (Cont)
c.
Repair. (figure 5-43)
(1)
Remove cylinder head assembly (para. b.).
(2)
Press out rocker arm shaft (1) and remove intake rocker arm (2) and exhaust rocker arm (3).
(3)
Using valve spring compressor, compress intake valve (4) and remove two retainer halves (5), collar
(6), spring (7), seal (8), two washers (9), and valve (4).
(4)
Using valve spring compressor, compress exhaust valve (10) and remove two retainer halves (11),
collar (12), spring (13), roto cap (14), retaining ring (15), two washers (16), and valve (10).
(5)
Remove check valve (17).
(6)
Remove two studs (18).
(7)
Remove two studs (19).
WARNING
Dry cleaning solvent, PD-680 used to clean parts is potentially dangerous to personnel and
property. Avoid repeated and prolonged skin contact. Do not use near open flame or excessive
heat. Flash point of solvent is 138°F (60°C).
(8)
Clean all items with dry cleaning solvent and dry thoroughly.
(9)
Inspect valves (4) and (10) and replace if stems are bent, seating surfaces are pitted or excessively
worn, or head of valve stem is mushroomed
(10)
Inspect springs (7) and (13) and replace if deformed or cracked.
(11)
Inspect retainer halves (5) and (11) and replace if worn, cracked, or bent.
(12)
Inspect collars (6) and (12) and replace if worn, cracked, or bent.
(13)
Inspect washers (9) and (16) and replace if cracked or bent.
(14)
Inspect rockers (2) and (3) and replace if bent or cracked, press out worn bushings (20) or (21) if worn
or excessively scored.
(15)
Inspect locknuts (22) and adjusters (23) and replace if threads are stripped or otherwise damaged.
(16)
Inspect roto cap (14) and replace if bent or otherwise damaged.
(17)
Inspect check valve (17) and replace if excessively dirty.
(18)
Inspect studs (18) and (19) and replace if threads are stripped.
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