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 TM 10-3930-660-24-2
CYLINDER HEAD ASSEMBLY REPAIR - CONTINUED
0270 00
REPAIR - CONTINUED
K
J
Valve Service Seat Width Range Limits
Minimum J
0.060 in. (1.524 mm)
Maximum K
0.080 in. (2.032 mm)
409-877
33.
Measure width of service seats, and if service seat is
K
too wide after lapping, grind lower seat surface (L)
G
using a 60 degrees seat grinder, and upper seat surface
J
M
L
(M) with a 15 degrees seat grinder until seat width is
centered and within specifications listed above.
60 degrees
409-4107
34.
Stamp two X's on side of cylinder head in line with pocket with service seat.
NOTE
Valve seats marked with one X at side of
cylinder head have been ground once and
if regrinding is necessary, install service
seat.
409-873
0270 00-13
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