PS Magazine - TB 43-PS-571

PS, The Preventative Maintenance Monthly

ISSUE 571

JUNE 2000
PS Magazine - TB 43-PS-571 - Page 8 of 34
PS 571
13
JUN 00
PS 571
12
JUN 00
We’ve solved this problem by installing a spring clip to the standoff
on the hull wall near the NBC hose. We then secure the hose in the clip,
which keeps it off the floor and out of harm’s way.
Attach the spring clip, NSN
standoff using a lock washer,
hex head bolt, NSN 5305-00-
071-2506.
You may need to enlarge the
mounting hole on the clip. Just drill it out with a
1
/
4
-in bit. Also, crimp
the clip’s flanges slightly so it holds the hose securely.
Replacing the hose, air duct and quick-disconnect will cost more
than $55, not to mention the possible health concerns. Our
fix costs less than $3.50.
SFC Brian Brashear
MATES, WAARNG
Yakima, WA
Dear Editor,
During our tanks’ annual services,
I noticed that the driver’s NBC hose
takes a lot of abuse.
When stowed properly, the hose lies
on the floor. That means it can be
crushed when the driver’s seat is
lowered. It also means that it gets
exposed to water, dirt, hydraulic fluid
(FRH) and other gunk. It doesn’t
take long for the hose to deteriorate.
On top of that, the driver has to connect his M42A1 chemical protective
mask to the hose when operating in NBC mode. A contaminated hose puts
the driver’s health at risk. FRH fumes can cause anything from irritation
to permanent lung injury.
Don’t Forget Scavenger Fan
M
echanics, a working precleaner scavenger fan is critical to keeping the
Abrams’ air induction system up and running.
All it takes to knock out the fan is a small
rock or chunk of dirt. If a rock gets sucked into
the scavenger fan, it can jam between the fan
blades and the housing. The sudden stop snaps
the hollow aluminum fan shaft.
With no fan, dirt, leaves and other debris
that collect on the precleaner don’t get removed.
Then the V-packs get clogged faster than nor-
mal and pretty soon the tank’s out of business.
If you’re getting a lot of complaints about V-
packs clogging too quickly, make the scaven-
ger fan shaft one of your first checks. If it’s broken, replace it.
M1-Series Tanks . . .
Now that’s an idea to “clip” and
keep! Good job!
Check for snapped fan shaft
you should
do something
about that
cough
.
i need to
do something
about your
nbc hose
!
NBC hose sits on floor
Clip keeps hose off floor
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