PS Magazine - APRIL 1975
PS, The Preventative Maintenance Monthly
ISSUE 269
APRIL 1975
The Guess 'n' Gobble Gang is on the
_
Loose!
They're the guys who guess-instead of troubleshoot-a
±
nd gobble up repair parts
they Don²³ really need.
´ike oiL pressure sendinµ Units-Transmitter,
oiL
pressUre, NSN
6620-00±814²_³
4770,
that's used on Most trUcks¶ tracked veHIcLes and other
engine·powered ground
Those GG¸ guys are real Fussy-¹up ºo
a
po»n¼.
_
They notice½ the oil pres¾uRe gage isn¿t reading right on ³he nose. Àt shows jus³ a
shade hiÁher; or Lower than ³he Tà says it should.
So they Ägure the oil pressure sendinÅ
Unit must be a³ FaUlt.
So ³hey replace Æhe unit. Çundreds oF
'eMÈ
É
So then does the gage Êread righ³ on ³he
nose aFter the sending unitËs Ìreplaced?
Probably notÍ
Oil pressUre gages aÎe no³
Ïhat accurateÍ
ÀF they show any pressUre
o\
.±
."
´
'
PRESs
,
±²
.³´µ¶·
¸•
·
µ
±,².
"/³
Q
±
d7²
,
³´
3
.
µ
¹
´
Ð
Ñ
at all when the engine¿s idlingÒ tha³'s good
º
enoUghÍ And the pressure should go up
'
¶¸
as engine speed goes up. This gage signals
'
real trouble when the needle doesn'³ moVe
oÓ the pegÔor when the needle drops sudÕ
denLY during opeÖation.
But the GGG has quit worrying about
³hat gage reading a little high or a little
low. They Ägure ×ey²Ve done all they can
aFter replacing ³he sendØng unit. They
MoVe on ³o the next one . . .
Çow do you stop ×e GGG?
ÙoÚ pu³ 'eM in a bare rooÛ Ü.
. wi³h a
Ýrigh³ light . . . and with a copÞ oß TB
9¹2300º228-20
»
(Jul
60)¼
Tactical Traàsá
âort
ãnd
ä
CoÛÝa³
å hicles:
TroÚÝæEá
shoo³ing çor Ànstrumen³
è
Clus³er Gagesé
Swi³chesé Circuit Breakersé Sendiàg ênitsé
aàë ìelated WirØngÜ
This TB ³ells exac³lÞ how to checK íî³
ÞoÚr oil pressïe gage (para
5½
aàd ³he
sendinð uni³ (para
¾¿.
But eVEn ³his ³es³ ÛaÞ ³ñòow ÞoÚó Beô
Fore you ³oss ou³ a "õaëö oil pres÷Úre seàdø
HOLE
OPEN
AND
CLeN?
TrY
IT
AGaIN
ing uni³é ÛaKE ùÚrE úE híæE iù opeà anë
clea
¶
n
ûü
.
-
·¸
¹
º
n
?»
i
I
1
j
I
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