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 317 of 532
decribEd In
(a)
and
±b)
B±low.
±a)
Us± a f²nE mill F²LE to rEmovE sharp cornERs
of ³RokEn hEad f²n´µ Do Not ¶EmovE morE mEtaL than
N·ceSary
t
pROucE a sm¸th¹y bLEndEd Edgº on thE
damagEd f²nµ
(») DEpth of any blENdEd f²n m¼st Not bE l½s
¾
thaN
6
pErcENt of ²Ts or²g²naL dEpth¿ WhEn b¹EndEd
fin is Les thaN
5
pErcEnÀÁ of or²giNa¹ dEpth, rEpLac±
cyLindEr As±mbly.
(2)
Stu And irUeR².
ÃEplacE damag±d, BEnt or
strippEd studs as dEÄcriÅd iN paragraph 8-ÆÇ and
CyL²NdEr ÈÀÉNdard Ètud ÊdEntiF²cat²on (TablE 3Ë14).
ÃEp¹acE dEf±ct²vE hEl²ÌalÍo²L ²nsEÎts as d±ScribEd ²n
·
paÏagÐaph 8Ñ39µ
e.
VAlve ³okeR ´Rm COveRs.
(1) ÃEpa²r or rEplacE damagEd paRTSÒ ÃEplacE
cyl²NdEr aÓÓEmbly whEN valvE rÔkEr arm covEr is
crackEd or hAs dEEp scratchEs or NicKs on thE mat²Ng
suÏfacEµ ÃEplacE cyl²ndEr whEn covEr damagEd canÕ
not be removed by polishINg w±t1² cRocus CLotH
I
d±P³ed ´n dµy-¶leanfOg so·vent (¸¹D-680, Ty³e
Ii).
(2) ÃEplacE ÖyײndEr aSSEmbly whEN valvE rÔkEr
coVEr dØs not conform to Jim²tÄ spEÙ²f²Ed in thE
REpa²r sTandardS (tab¹E 3Ñ13)Ú ÃEplacE damagEd ÓcrEw
thÏEÛd iNsErÜÝ a instrÞctEd ²n paragraph 3Ë39µ
÷p×acE crack±d adjusting covErsµ ÃEmovE m²nor
±
n²ßksà buáâ, or ÓÖratchEs from mat²ng s¼rfacE with
º»¼Cus
clotH
d±³³ed
iã
d½y-CJeaj¾¿nG
solvent
I
ÀÁÂDÃ680Ä Ty³e ÅÆ).
FÇ
µaL¶e ³·ckeR ´Rm.
(1) ÃEplacE valvE räkEr arms
(2
and
8,
figµ 3-
1å) æhEN crack±d or worN or ²f thE valvE rçkEr aMè
ÏoLLEr and bush²Ng arE worN or damagEdé
È2É Êe³la¶e AdËust±ÌG scÍEW À34) wHen tHÎeAds
aϺ strippê or damag±d or whEn scrEw biNd iN
RëkEr armÒ ÃEplacE adìust²Ng scrEw whEn sw²vEL pad
dís Not rotatE fRîly oN ÓcrEwï
±·
VAlve ¸O¹keR ´Rm ShT º»emblie¼.
(1) ÃEplacE crackEd or dEEpðy sÌorEd ¶ÔkEr aRm
shaft añEmbl²½ (14 aNd 31à figÚ 8-òó)ï
(2) ÃEpLacE rôkEr arm shafTÓ that do not õnö
foÏm
t
LimiTÓ sp±c²fiEd in thE rEpa²r standardS (tab¹E
Æ-÷3)ø
h.
Valve, SpRiNg•½ SP¾Ing ³e¿aIneRs and
ùoúoûüµ
(1)
µalvEs.
{a)
D²Óýard valv±Â (2 and 8, f²gµ Æ-1þ) ÿhĀch do
not conform to l²m²tā spEc²fiEd ²n REpa²Ð sTandAÐds
(ĂăbLE ÆĄ1Ç). ą²sÙArd vaLvEs hav²ng waÏpêĆ cÏAckć,
pĈtĉ or buĊEd faceċ Discard va¹v±Â having bAd¹y
pĈttºdà ÓČoRê, scraÀch±d stEčĎ or lÔking gϸveÒ
ďĐ đÑĒÇē5ÑĒĒ0ĔĕĖ
(») ÃEfacE ÂLightly p²ttEd or bėrNEd valvEs that
do not havE
²
of ĘnTact
t
ę²ĚiěÉ spEcif²Ed in
f²GRE 3-1Ĝµ D²scard valvEs that caNNot BE REfAcEd
T
th±sE l²m²TÓø Ch·ck vaĝvE lENgTh fRoĞ sEat conğct to
tip of stEm afTEr gr²NdiNgĠ as showġ ²n fig¼Ï· 8Ģ1Ĝµ
D²sýard valvE
´Ï
lEngTh ²s Not with²n LimiÀā spEÙ²f²EģĤ
(2)
µaLve spRÀngs.
ÃEpLacE spriġgs (Çà 9à aNd 1ĥĦ
f²gµ Ç-òó) whEn worn, crackEd or othErħ²Óº daĨaĩdµ
ÃEplacE spr²ngs that do not coĪform to limiTā
sp±c²f²Ed iN rEpa²r sTandardS (TabLE 3-18)ī
(3)
ValÁe spRiNg ReÂAÃneRs, valve R·ÂORsÄ And ÁÅlÆe
Lo
.
(Å}
ÃEp×acE uppEr intakE aNd Exha¼st vALvE
spRing RETÛ²NEÎs (11 and
8,
fig. Ĭ-1ó) and vALvE
spRing sEat ĭ7Į whEn crackEd or woįÚ
İ
±b²
ÃEpLacE valvE rotorÓ
³3´
whEn iNNEr sıIJ
t²oN dØs not rotatE frEEly or whEn aSsEmbly ²s worn
or crack±dij ÃEplacE vaLvE lçk spr²ng ¶Eta²nERs
µ1¶
whEn worN or crackEdµ
·¸ 7·¹ AssemBly
a. ÇylÈndeRs.
(Ĵ) ĵnstaLl ²ntakE va×vE (8Ġ figĶ ÇË1þ) and Exhaust
valvE (2) ²n thE²r r±Sp±Öt²vE gÞ²dEs in cyķ²ndEr (6)µ
Hold valvEs ²n pĸ²t²on and placE thE cyķ²NdEr on
valvE rEmoving aNd ²nsErt²ng stand (Fig. 8-1Ĺ)ï
(2) ĺnsÀÛ¹l thE EXha¼st va×vE rotor (87à f²gĻ Æļ1Ľ)
outEr, ²ntErmEd²atE and iNnEr spriNg (Ç, 9, and 1ĥ),
and ±ľhaust va¹vE spring ¼ppEr ¶EtainEr
º8»
ovEr thE
Exha¼st valvE sTEm Ŀs shown ²N f²gėrE 8-1ŀø ŁNsł×l
thE LowEr inŃkE valvE spr²Ng ÓEÛt (7) o¼ĂErń inIJ
tERmEd²atE and iNNEr spr²ngs (Ç, 9, aŅd 1ņ)Ň aNd uppEr
²nÀakE valvE spr²ng REta²nEr (ò1) ovEÏ thE ²nÀakE stEm
²n ňthE samE mannErµ Compr±ÂʼnŊ valvE spr²ngs and inIJ
stalL valvE locks foL×ow²ng inÂtr¼ct²ons wh²ch acIJ
company f²g¼ÏE 3ŋŌōï
±A)
PoS²tioN thE vaLvE LifT±r assEmbly PaÏT Ŏo.
Ç7ŏòŐ8Ő ovEr thE va¹vE spr²ngs and REta²NErÓ and
őÙ¼rE in posit²on with foÞr 6/òŒ ľ 1-3/Ç Bo¹TÓ and 6œ1Ŕ
iNŕ fðat washERÂŖ
±b)
ComprEss valvE spr²ngS and ÐETa²nErs w²th
sýREws and ²NstaŗŘ two valvE lÔk spring r·tainE¶Ó
¼1¶
iN thE g¶¸vE of ±Ûch va¹vE st±mī ÃElEaSE valvE sprinř
compR½s²oNµ ÃEmovE valvE l²fÀEr assEmbly PaRT Ŏoµ
Ç7Œ1ŚŐ from cyl²ndEr aNd rEmovE cyl²ndEr from
sÀandµ
.
²
ÀCÐ ÑÒe¶k
vAÓveS
Ôoµ ÕeÖkAG×
By pÓa¶´nG
¶yl±ndeØ oN ±ts Ù´de w´tH ¿ÚtAke oÛ exHAUÜt poÝt uÞ
And ßàÓláâ¾g valve po½ã W´tH
d»yäålæAniçG ÙolveNt
(èéê-6ëìí Type
II½
And oBse»vîÌG vAlve SeAt aÝeA Ôï»
ðñòól lôAkageõ
śŜŝŞşE
ö
÷øùú7
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