PS Magazine - TB 43-PS-629
PS, The Preventative Maintenance Monthly
ISSUE 629
APRIL 2005
PS 629
APR 05
M2/M3-Series
Bradleys…
Get L
o
o
s
e Locknuts Replaced
T
raveling over Iraq’s rocky and sandy terrain is rough on your Bradley, crewmen.
It’s especially tough on roadwheel locknuts.
The constant pounding and vibration loosens the locknuts. Just one loose locknut
puts pressure on the surrounding ones until they start to slip. That results in wal-
lowed out holes on the roadwheels, stripped threads and sheared studs. You may
even have a roadwheel take off on an unauthorized trip of its own!
Check the roadwheel
locknuts regularly. Look for
shiny areas under the lock-
nuts and washers that indi-
cate movement. Feel the
washer itself. If it moves, the
locknut’s loose.
PS 629
APR 05
12
M1-Series Tanks…
Find the Range to Safety
B
oth during operation and after, gunners should always be thinking safety. So if your
tank is equipped with a non-eye safe laser, NSN 1240-01-149-8302 or 1240-01-357-
5085, remember these two very important details.
1.
Always install the eye-safe filter, NSN 1015-01-234-8166, on the laser rangefinder
(LRF). The filter protects others from a potentially blinding laser hit if the LRF is
accidentally activated.
You can tell the filter’s installed
by the green tag that hangs out of
the LRF.
2.
Make sure you put the safety
guard, NSN 5930-01-171-4788,
back in place on the laser
rangefinder (LRF) when the mis-
sion’s complete.
The safety guard keeps you
from accidentally moving the LRF
switch to the armed position while
moving around in the tight con-
fines of the turret. Since the switch
can’t move, there’s no chance of
accidentally arming the laser.
If your tank’s equipped with an eye-safe laser, NSN 1240-01-418-9498 or 1240-01-
419-2232, the filter and safety guard are not required.
Look for green tag to
tell if filter is installed
Guard keeps laser
rangefinder switch
from being flipped
my gunner
forgot
to put
the safety guard
back on my laser
rangefinder!
Just make sure you
mark the loose lock-
nuts with a dab of
paint or by scribing
so you can identify
which ones were loose
when you get back.
Then, when the
mission’s complete,
tell your mechanic.
He’ll replace the
loose locknuts,
NSN 5310-00-1
7
5-2
7
10,
and torque ‘em to
1
7
1-189 lb-ft.
Look for
shiny spots
and
spinning
washers
all this
bumping
around
is
loosening
our lock-
nuts!
I hope
they check
‘em
soon!
ouch!
you guys
better not
walk there!
On a mission? Re-tighten
the loose locknuts to keep
the roadwheels in place.
629.12-13(C)
2/21/05
4:29 PM
Page 1
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