DMWR-9-2815-220
AVDS-1790 ENGINE OVERHAUL STANDARD
DEPOT MAINTENANCE WORK REQUIREMENT
DMWR-9-2815-220 - Page 601 of 1422
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5-72.
Inspection.
¹ º
»¼
DMWR 9·281S220
a±
General.
²Nspect the o³l coolers, o³l cooler screens´
and assocµated
parts accord¶ng to ³nstruCtioNs ³n paragraph 5·4 (¸/2 ) and the OIP's ³¹cluded
³n thºs sect³on.
Wear L³mits» f³ts aNd toleranCes for the o³l Coolers¼ o³½
Coo¾er screens» aNd assoC³ated paRts are l³sted iN tab½e ¸¿À8 (5/452)±
See
paragraph 5Á4Â
B aNd C
(5/3 ) for explanat³oN of
wear ½³mÃts¼ F³ts»
aNd to¾eRÄ
½
aÅCes±
¾-
b±
Oil Æoo½er Assembl³esÇ
ÈnspeCt oɽ cooler assembl³es foR dented tubÊNg
or bent f³ÅsË
InspeCt gasket contaCt surfaces for burs aÅd ra³sed MtalÌ
Seal
a½l o³l cooÍeR opeNings±
Pressure Check cooleRs by pUmp³Åg eNg³Ne oÃl (OEδ
dry
a³rÏ
oR N³trogeÅ iNto coolers at 400 psi hydrostat³C pressure±
O³½ CooleRs must
hold Ð00 ps³ For teÅ m³Åutes without loss oF pRessUre±
TheN release pressUreÑ
dRainÒ
and F½UsH with dry c½eaN³ng so½veÓt (Ô¿D¿680»
Õype ÈÈÖ.
Ident³fy ½eak³Åg
coolers For possib½e repa³r±
¿
À
S
/'O
±I
0
C.
×HeRmosØat³C ÙYass Va½ves±
IÅspect eNgine aNdÚ tRaÅsm³ssion o³½ coÛ½eR
thermostat³C By pass valves for stR³pped oR damaged threads±
ÆheCk valÜe opeRaÝ
t³oÅ by ³Þers³Ng va½ve ³N warm waterË
ßsiNg aN accà
á
rate thermoâeterÏ gRadua½½y
ra³se the wateR tempeRatuRe to that marked oã the
ve cover±
ValÜes äarked
148 degrees
F
màst traÜel 1/п³nch BetweeN
O
d ådegrees
f.
Valves marked
æ8¸ degRees
F
must traÜe¾ 1/п³nch BetweeN
Nd 185 degrees
±²
After
ç
checking
ÜalÜe operat³oN» remoÜe Üalve from water
d clean w³th dryèCleaN³ng solvent
(é·êëì80, Type ÈÈ)±
íeplaCe valve assemb ³es whose traÜe¾ ³s less thaN 1/4 ³Åch.
sor
d±
î³½ Æoo½er ïoses±
Ènspect oÃl cooleR ³Nlet aÅd outlet hoses for Breaks
or aðñasions in the³R woven sh³eld³ng.
Test hoses at
s³ pRessuòe±
óeplaCe
aNy hoses Fa³l³ng the pressure test±
Á
'"
e.
O³l Æooler ôcReensõ
INspect o³½ cooleR sCreeNs For beNt» CraCkeö» oR
brokeN moàNtiNg BRaCkets±
Also Check FoR torN or bRokeN screeNiNg±
óeplaCe
screeNs ØHat aRe unserv³Ceab¾e.
_Æ÷øù;
y
5²4³´
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