PS Magazine - TB 43-PS-598
PS, The Preventative Maintenance Monthly
ISSUE 598
SEPTEMBER 2002
PS 598
SEP 02
6
M1A2 SEP Tank…
a
blocked or leaky vapor compression system unit (VCSU) on your M1A2 SEP
(system enhancement package) can cause some hot problems, crewmen. That’s why
you’ve got to be extra careful during before-operation PMCS.
When storing gear in the bustle rack, it’s easy to block the VCSU vent. With the
vent plugged, the VCSU shuts down and the crew compartment doesn’t get the air
you need to stay cool during hot weather.
It’s also easy to miss a leaky manifold under the VCSU. If the leak is severe
enough—a Class III—the hydraulic fluid gets into the engine compartment where it
can start a fire.
Change 2 to Page 2-50 in TM 9-2350-388-10-1 will include a caution about
blocking the VCSU vent and an additional check for leaks.
Until the change is
available, put a copy
of the following
table inside your TM:
Item
No.
4
5
Interval
Before
Before
what’s
wrong?
are you
hot?
I’m
not,
but
you
sure will
be!
all that
gear has
plugged
my vcsu
vents!
Location
Item to
Check/
Service
Vapor
Compres-
sion Sys-
tem Unit
(VCSU
Air Hand-
ling Unit
(AHU)
2-50 Change 2
4c1063
TM 9-2350-388-10-1
Table 2-1.
Preventive Maintenance Checks and Services
Crewmember
Procedure
CREWMEMBER
CAUTION
Do not block the VCSU
intake grill. TMS may not
operate correctly if VCSU
intake grill is blocked.
a. Clean dirt, leaves, and
other material out of VCSU
louvers
b. Check underside of VCSU
for hydraulic or coolant
leaks. If leaks are found,
notify unit maintenance.
c.
Remove pin (1), washer
(2), and lower ballistic
cover. Inspect for leaks.
Reinstall cover and pin.
CREWMEMBER
a. Check for hydaulic or cool-
ant leak. If leaks are found,
notify unit maintenance.
b. Inspect heat exchange for
dirt. Clean with brush as
required.
Not Fully Mission
Capable If:
Class III hydraulic
leaks
Class III hydraulic
leaks
Class III hydraulic
leaks
598. 06-07 (C)
8/2/02
1:12 PM
Page 1
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