PS Magazine - TB 43-PS-664
PS, The Preventative Maintenance Monthly
ISSUE 664
MARCH 2008
4
PS 664
MAR 08
5
PS 664
MAR 08
a
little rust on the driver’s hatch periscope thumbscrews can end up being a
nightmare.
Those thumbscrews are supposed to make removing the periscope to install the night
sight an easy task. But if they get rusty enough from rainwater and condensation, they
won’t move. Even worse, if you use a wrench to try to unscrew ‘em, they snap off.
Then your mechanic has to drill them out before new thumbscrews can be installed.
And the whole thing starts over again.
If you’ve got stuck thumbscrews, try spraying them with some penetrating fluid
before trying to loosen them. NSN 6850-00-973-9091 brings a case of 12, 10-oz spray
cans.
Once you’ve got the rusty thumbscrews out, get replacements with NSN 5305-01-
106-7961.
•
Because the carriers no longer have
swim capability, you don’t need pivot
steering for moving around in the
water. That’s always been the main
use of pivot steering.
•
U-joints and the transmission case
break when pivot steering is used
while the carrier is moving. Even at
speeds under 15 mph, pivot steering
tears up U-joints, the transmission
and differential.
•
To prevent damage and injuries,
some mechanics disconnect the pivot
steering controls. That’s no good,
because a loose horizontal rod can jam
the steering laterals. Jammed laterals
mean no control over the vehicle.
M2A3/M3A3 Bradley…
Rust Removal Made Easy
M113-Series FOV…
Pivot Steer Reminder
Thumbscrews
rusty? Use
penetrating
fluid to
loosen
I just can’t get
those periscope
thumbscrews loose!
they’re
too
rusty!
try this
penetrating
fluid on
‘em!
hey!
I
told
you to
keep
your hands
off my pivot
steer!!!
drivers, stay
clear of the
pivot steering on
your carriers.
keep it
connected
and keep
your hands
off!
here’s
why…
so do yourself
and others a big
favor: leave the
pivot steering
connected. then,
leave it alone.
Don’t
disconnect
pivot
steering;
do
keep
hands off!
don’t make
me tell you
again!!
664.04-05.indd
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2/4/08
12:30:56 PM
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