TM-9-2815-220-34
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED, 12-CYLINDER, ASSEMBLY; MODELS AVDS-1790-2C (2815-00-410-1203) AND AVDS-1790-2D (2815-00-410-1204)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
TM-9-2815-220-34 - Page 316 of 532
TM 9·2815·220·34
(±)
Valve
3eau.
Replace Cylinder asSEmbLy
(5,
fIg.
3-19) when ±nserts are Cracked, lose Or exCess±velY
wOrn ±n the Cyl±nder² Gr±nd seatS wh±Ch dO nOt shOw
360°
COnTa³t w±th vaLve face. ´r±nd ±nserµs (f±g.
3-19)
as d¶scr±bed ±n
(a)
and
(b)
beLOw²
±a) A 45
degre¶ angle g·±nd±ng sTOne musT bE
Used tO g¸±nd eXha¹st vaLve seat and a
1²
deºr¶¶
angLe º»¼nDIng stOne M¹st be ¹sed fOr ±ntaKe vaLve
seats½ ¾ress seat On The ±nsert w±th sTOne, ¹s±ng vaLve
seat gr±ndIng Mach±ne¿ After dress±ng s¶at Of InÀErTÁ
ChECk valve COnTaCt as desC·±bed ±n paragraph
8-71b.
{B)
When
3³°
cOntaCt Is Obta±nedÁ na»rOÂ ÀEaT
On ±nsert tO wIdµh speC±f±ed ±n f±gÃre
´3·µ¶)
by º»±ndÄ
±ng Inner ÅaLÆ and eÇpOsÈd face Of ±nÉEÊt tO thË
angLÌ speC±fIedÍ Îeep vaLve seaT a·Ea aÀ near
a
pOsɱble tO center Of vaLve faceÏ VaLves shO¹Ld never
ɶaT aT tHe tOp O» bOttOm Of the vaLve face a·¶aÍ
15° .
15'
1
HIN S
-
EAT ANGLE
O.osgo Mi
N
-±
±NSE
R
T ²EAt W³DTh
(
NE
w
)
²³´
0
.±9²³ RX
0´µ60 m¶N
o·¸¹ r
45°
²
p
º 00'
M»N ²EA¼ AN½lE
¾¿AX)
»NTAKE VALvE
EXÀAUS¼ vALvE
SEE
NOTE 1
REGrIND ON THIS LIn
45
Á
+ 15'
ÂhEÃ ÄÅdTh
OF
VALVE
.
m
²EE
NÆtE
l
ÇNÈEÉt ExCEEOÊ
iJ:
'
±
NÆtE 1
NEw
»NTAkE vALvE
Ë´355 TO Ë,3Ë9
EXhAu²¼ ÌALvE
7´µÍÎ ¼Æ 7.024
ÏEPA»É
Ë´3Ð4µ
Ñ.0340
NOTE´
AÒÓ O»¿EÔS»ON² SÕÖN
A×E ØN »NCÙE²Ú
TA
126±54²
figure 3·19. ValvE And ±²L³e sot iNRT g´Iµd¶nG d¸OgROm¹
B¸ CyLinder ¹oRe.
RepLaCe cYLInder asɶmblY when
CYL±nder bOre
d±mensIOns arE nOT ÂIthIn lIm±µs
sp¶C±f±ed ±n the repaIr standarDs ÐtabLe
3-13),
Or when
average dOMe end
meas¹rement ±s
LaÑÒer than
average flang¶
end
meas¹rementÓ Ôhe CYLInder
assembly shOULd aLsO be r¶pLaC¶d when the CylInder
bOre has eÇCess±ve sCratChesÕ scOrIng Or r±ng r±dºÈ Or
Åhen the bOre ±s gLaz¶d Or smoThÓ
c±
CºmJ»Iºft ¹eº¼½ns Slee¾ej¿
F±ne ÀcraTChËs On Öhe
bear±ng s¹×face are nOt CaÃse fOr rej¶Ct±OnØ ReplaCe
caMshÙft bear±nºs when The bear±ng sÚÛfaC¶s arE
sCOreD, gaLLed, Or deepLY p±tt¶d, Or when Bar±ngÀ dO
ÀÁÂÃÄ
Change
2
nOt COnfOrm tO The l±mITs spec±f±¶d ±n the ʶpa±r stÜnÝ
dards ÞTable
3Å1À)Æ
D. CylindeÇ ExTÈRioRÉ
(1ß
coolÊËs
Jm.
àTra±ghten b¶nt fIns as near
A
p0Ible TO TheIr Or±g¼naL spaC±ng² ReplaCe CYá±nder
ÜâsEMbLY when mOre than One perCent Of baããËL
ColIng f±n area Is brOkenÍ ReplaCe CyL±nder ÜäsEmblY
±f head f±n Is brOken mOre than haLf The depth Of The
fIn Or mOre Than tÂO InCh¶s lOngÍ
´
CylInder ÜsÀËmå
blY Can æ¶ ¹sed ±f ±ç has nOT mOre than thÊè aCÝ
ceptabée defECµsÕ Or ±f nO TwO Of the defECts arË On adê
JacenT f±ns½ Repa±r dÜmagÈd CYL±nëer head fIns
±
)
³
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