PS Magazine - JANUARY 1979
PS, The Preventative Maintenance Monthly
ISSUE 314
JANUARY 1979
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Dear Editor,
We
'
ve had several caSes lately
wheRe ouR M60-series tanks had
the blahs.
The engines ran slow ±stalled
at low ²PM ³and they wouldn
'
t
develop full ho´epower.
We checkeµ eve¶hing just like
the tRoubl·shooting tables in ouR
TM-20 said.
The aiR cleaneR screens and fil¸
teR elements weRe clean
¹
There were no restrIctions oR
obstructions in the exhaust pipes
.
The acceleRatoR linkage was
fRº and cl»aR and adjuste¼ Right.
Both fuel tanks had about the
same amount of fuel, and the
electRic fuel pumps weRe woRk¸
inG.
We'd just Changed the prIma½
fuel f¾teR and weRe about Ready to
chaNge the engine fuel pump.
Then we decIded to cHeck the
pump
'
s pRessure
.
The pRessure
was low. A l¿ttle adjustment on the
6
Àet tÁe Âransmission prÃsÄUre
gage
,
ÅÆÅ ÇÈ20-00-795-0330,
which comes as a special tool for
your MÇ0 tank
.
Yo1'll also nºd a
É/Ê-in open end wRench anË a
screwdriver from your mechanics
tool set.
-±²³´µ
Ìemove Íhe vent plug from tÎe
fuel
Ï
ÐÑter sepaRator aÒd inÓtaLl
the transmissiOn pressuÔ gagÃ.
fue
l
/
water
ÆtaÕ the engine
The fuel puÖp pr·ssure should
b
40-50 PÆ× at Ø
,
800 to 2,Ç50 ²ÙÚÛ
in the AVDÆ Ø790-2A engine and
55-Ç0 PÆ× at tÎe same ÌPM in the
ÜÝ Ñnd 2D engines.
×f the gage doÃsÞ sÎow th·se
preÓsures, looÓen ße locking nut
on the pÔssuÔ adjusting scÔà.
Tuá the adjusting ÓcRew until you
get the RigÎt pressure. Tuáing the
scÔw clocKwiÓe wâl iãcräase tÎe
pÔÓsure.
×f you canåt adjust tÎe pump
,
replace it with a new one. æse
ÅÆÅ 29Ø0
-
00-678
-
4675 for the
AVDÆ Ø790-2Ý anµ -2ç engines.
ÅÆÅ 29Ø0-00è67é-4Ç73 iÓ fOr tÎe
-2Aengine.
ÆFÝ ²ichaRd
J±
Felt
Ø
Ï
66 2AD Ft. êood, TX
(
Ed Åote: This hOldë true ìr tÎe
M48í5
,
too.)
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