PS Magazine - JANUARY 1979

PS, The Preventative Maintenance Monthly

ISSUE 314

JANUARY 1979
PS Magazine - JANUARY 1979 - Page 7 of 35
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Howitzer
The hot news on Ml0910±A²
howi³ers is that too many of them
are overheating and cracking
their engine cyLinder heads.
The cyLinder head, NSN 2815-
00-±70-1204, is in short supPLy,
which means if your howitzer gets
deadLined for cracked cyLinder
heads it is going to stay deadLined
Fr a Long time´
TM ±µ2350µ217µlON (Sep 74) on
Page 2-41 teLLs how to stop your
vehicLe in 8 easy steps´ It even
warns you:
-±²³´µ¶
-
±·²³´
µ¶¸¹º»¼½¾¿À¿Á ÃÄÅ
·¸¹º»¼½
Flash
Shutting o¶ a hot engine wi·¸
out Letting it cooL down is the
biggest cause of crackeD cy¹inDer
heaDs´ ºet your hot engine run 5
minutes at high iDLe (1,000 to
1,200 R»M) to cooL it to 185°¼ or
beLow beFre you shut it o¶½
The seconD biggest cy¹inder
head cracker is pouring coLd cooL¾
ant into
a
hot radiator with your
engine
¿
turned o¶´
Some crews never read page
2-16 in the À10 TM, which shoWs
that the cooLing system is sup¾
posed to be checked
before
vehicLe
operationÁ
They pour cooLant into the
raÂiator
after
operation whiLe the
thermostat is hanging wide open,
and the engine o¶´
³0
I
they haD the engine running,
it wouLd circuLate the new cooLant
and mix it with the warmed up
cooLant aLready in the radiatorÁ
Ãith the engine o¶ and the ther¾
mostÄt open, the newLyÅadded coLd
cooLant tenDs to get right to the
engine and cracK the cyLinDer
headsÁ
Here'Æ ÇÈat you Can do aboUt other thÉngÊ that makE yoUË Engine
Ìn hoÍ anD set tÎe stage Ïr CraCkeD ÐyLinDEË ÑeaDÆÒ
GET iT sT¾Am clEAnEd OR
us
(;¿
RAdiÀTOR cLEAning TOOL
NSN 2815Á00Â49Â8257
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