DMWR-9-2815-220
AVDS-1790 ENGINE OVERHAUL STANDARD
DEPOT MAINTENANCE WORK REQUIREMENT
DMWR-9-2815-220 - Page 208 of 1422
DMWR 9-2815-±±0
5-21.
Repair and Assembly.
a. Repai±²
(±)
GeNeral ±ePaI± inst±uctions² Refer to parag±aph
5-5 (5/5 )
³ Replace
c±ankshafts tHat a±e DeepLy sc±atcHe´, nickedµ bUr±ed¶ sc·fFedµ o± ga¸¸ed¹ Mino±
º»perFectioNs In the jo·rnals »ay be repaired By polIshing wit¼ a croc·s c¸oth
dipped In dry c¸eaNing solvent
² P³D´680,
Type
Ii).
(²)
CraNkshaFt assembly²
-
±²
½¾¿Nkshaft³ ÀrankshÁFts that a±e worn beyond standard wear
µ
I»its
-
Â
sÃecifIed IN the overhaĸ standards (taBle
5-¶· ¸¶/7¹
}º
or wit¼ joUrNal o± crank
pIN damage may be g±o·nd unders
i
ze
:
to t¼e lI»Its lIsted In tab¸e
5-5 (5/7» ).
(b) C±ank Åins aNd JourNals.
³f
any oF the crank pÆNs o± jO·±na¸s a±eÇ
fo·nd ·nserviceab¸eµ It wil¸ Be necessa±y to grind a¸l crank pINs or ÈoUrnals ·NIÉ
foÊËly UndersiZe to »aINtaIN the balaNce oF the crankshaft³ Extreme care »Ust be
taken w¼en grindINg to ÌaÍNtain the concentricIty oF theÎenti±e crankshaft and not
to XceeÏ a sUrFace ±oUghNess of
µ2
»icro ÍnchesÐ A¸¸ ±adii on the crank pINs aNd
joUrNa¸sÑ affected by g±INdINg undersIzeÒ »ust be reÓestab¸Ished to oÔÕgInÖl
×
co
ØÙ
FIgU±atIon³ The c±aNkshaft craNk pIÚs
Û
and jourNals »Ust Be inspected by magnetic
partÜcleÒ or sI»I¸ar »ethoÝÞ¶ For fractu±es and surface cracks afte± ß±àndIná³
(e)
Dowel pin: and strAighT pI.
RPlace ±OWeL ²iN a³´ stµaiGH¶
Pi³S ·³ c¸A³kSbAfT F L¹³qEº iF ²i³s
d
not
Fit »ecu¼e½y ¾ FLA³¿e, A¸e oUt-oFÀ
¸ÁU³´Â oà iF ²iÄ»
d
n´µ_
¶o ÅÆ¶Ç sÈciFie´ ÉÊ ¶He
OIP'
Ç.
ËF ¹²À
²ÌiCAB½e Gµ·n´ ²Í» ÎÏ(
¶
´) To ÐTÑÒ¼± ÓizeÔ ¶HÕº elÖ³ATi³× tHe
¸eamnG oF TØe c¼aÄK»b¹F¶ FÙ³qe
·'\
ftyw±cl.
NOT
L
s
.
Q
F
te heales gov de³ pin
I
e
±
a
aE in 0²0³5 ´, 0²010 µ
M
r¶ ovR·¸¹ GºN
Th·¸¹J
S ´
oV»·¸ dO¼L p½¾ T¿ sD
µe,
n
ÀS Á ÂÃ6Ä ÅÆ Ç¼AÈ ÉÊ
rA
Ë
m f¶e H·e¸.
âdã Crankshaft reälace»ent. Rep¸ace a cracked crankshaft o± a crankshaft
showing eVIdeNce of wear d·e to bent or twisted connectINg ±ods.
bå æssemb¸y.
(1º
çeNeral asse»blY èrocedUres. ReFe± to paragraph
5¼8 ²5/ ½»)
For general
asse»bly p±écedures³
²2¾
êsse»bly proceduëes¹ ìefe± to íî
9´28±5-22¿-34À
5/88
F
»
j
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