PS Magazine - MAY 1978
PS, The Preventative Maintenance Monthly
ISSUE 306
MAY 1978
l
I
So, before you do anything with the GSCB, disconnect the
W19El
and
w22el
negative cables from yoUr lead acid batteries No.
1
and No.
3.
If you Leave the battery leads attached .
.. and accidentally ground thE GSCB
hot leads on metal .
.. kiss the GSCB goodbye.
Finish re-installing the GSCB
b±for±
you re±connect the ²egative lEads.
In other words, that caution printed on the GSCB a³out disco²²Ecting the
batteries is for real.
On the good side of the picture, charged batteries arE the thing f´r a top
oPerating launch station.
18
Your
system
mechanic
provides
that wiTh a specific gravity cHeck of the
batteries
at
each
monthly
service,
insuring
that
the batteries have a
specific graVity reading of
1²250
to
1³300²
Cells in Each battery should vary
no more than
²040
sPecific graVityµ
¶erminal voltage shoUld be at least
12.0
voltsµ
If the readings are less than
´.250,
they need a charge. Get 'em rePlaced if
they don·t come back up to at least
1.250µ
¶he
¸
monthly, too, should insUre
that the charging system is PUtting oUt
the right voltage (too mUch or too
little is harmful).
-±JO
-±20
²
1.³50´
F
²
'"L
µ¶·00
±
_³ ´µ
-
5
R
¶
'
·
µ¸¹º0
±
A
R
·
G
uoo»
¸
BATTERY
CHARGE
¹º»
-¼½0
¼•1½
¾¿2½
Fifty
hours. Mark
that
in
your memory¹
Fifty hours, and eVery
50
hours of operation,
is
the
timeº
Period
»or
changing the oil in your Chaparral missile system air compressor.
Forgetting it can be a Very ex¼e½¾
siVe lapse of memoryµ ¶he comPress¿r
doesn·t come cheapµ
¶he oil gets a daily check, tooµ If it·s
low", ³rinÀ it
Á
uP to
Â
the mark on tÃe
dipsticK¹
When you change tÃe oil,Ä remÅÆe
B
MS ¶-7A
the sUmp pan and clean it¹
OnLy·¸
dOn't
¶he only oil you use noÇ in Èhe
compressor is BMS
3¹º
A.
NSN
»150¼
00¹½53¾¿66º
gets yoU a quart, and the
ÉÊ
ËomPressor takes
²2
Pint for a re»illµ
NEver miX BMS
3˼a
with any otÃer
oil.
THE to aND
19
³M ´µ¶4·0¸¹º5»!¼,
C ½¾nd
ÁÂPIÃCÄ
¿OeÀhÁR
ÂÃÄ
SÅrY FÆÇ yÈUÉ
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