PS Magazine - TB 43-PS-695
PS, The Preventative Maintenance Monthly
ISSUE 695
OCTOBER 2010
5
PS 695
OCT 10
M
echanics, when it’s time to change the engine oil in an M1-series tank, the TMs
and LOs are pretty specifc about what to use: MIL-PRF-23699.
But there’s actually a lot more to the story. Did you know that there are three
di±±erent classes o± oil under this specifcation, each with its own set o± NSNs? And
did you also know that the class o± oil you use can either help or hurt that AGT1500
engine, depending on the situation?
The Classes
High Thermal Stability (HTS) Class.
This class is ±or normal engine use. HTS
class turbine oil contains special anti-coking additives that help prevent bearing and
seal damage. That means more operating hours between major repairs and big-time
cost savings.
Standard (STD) Class.
This class should be used only as an emergency substitute
i± HTS oil is unavailable.
Corrosion Inhibiting (C/I) Class.
This class is specially designed for long-term
storage only. C/I class oil contains additives that make it ±oam-, wear- and corrosion-
resistant. Use it in tanks that will be stored outdoors ±or longer than 6 months or
indoors ±or longer than 12 months.
While in storage, you may need to exercise, move or per±orm maintenance on the
tank. C/I oil is OK as long as usage doesn’t exceed 50 hours and the tank is going
right back into storage.
When the tank is coming out o± storage and back into regular operation, drain the
C/I oil and replace it with HTS engine oil.
Y
our M1-series tank goes through
a lot of jarring movement when
it’s being transported by ship or
train. And that movement can
cause damage.
Make sure you
close and lock
the semi-ready ammunition door
before your tank is shipped. If
you leave it open or unlocked, the
door may bang open and closed
over and over during transit. That
damages the locking mechanism.
What to Order
SIze
NSN 9150-
Class
HTS
HTS
HTS
STD
STD
STD
C
/
I
C
/
I
C
/
I
8-oz
1-qt
55-gal
8-oz
1-qt
55-gal
8-oz
1-qt
55-gal
01-439-0764
01-439-0756
01-439-2070
01-476-1074*
01-476-1075*
01-476-1083*
00-180-6266
00-985-7099
00-681-5999
The 2007 version o± the
TARDEC POL Products Guide
, lists C/I class oil frst on
Page 9. Don’t be misled, though! HTS is the #1 choice ±or normal operations. To
check out the guide, go to:
2007%20POL%20Products%20Guide%20_JAN07_.pdf
*Order on a DD Form 1348-6 and put “NSN not on AMDF”
in the REMARKS block
M1-Series Tanks…
Not All Engine Oils Are Alike
M1-Series Tanks…
Less
BANG
for Your
BUCK!
so, now
that you
know
about the
classes…
here’s what
to order…
owww!
why didn’t they
secure my semi-
ready ammO
door
first?!
how about
the nsns?
OK! that’s got the
engine drained. now
for some
new oil!
USE
ME!!
NO,
ME!!
waitaminit!
what’s
wrong with
using
me?!
695.04-05.indd
1-2
9/8/10
5:13 PM
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