PS Magazine - TB 43-PS-728
PS, The Preventative Maintenance Monthly
ISSUE 728
JULY 2013
4
PS 728
JUL 13
5
PS 728
JUL 13
C
rewmen, the turret basket screens
inside your tank will soon be fapping
loose and causing all kinds oF problems
iF you don’t keep an eye on ’em.
Each screen is held in place with a
screw, NSN 5305-01-388-5093, and
ball stud, NSN 5307-01-100-8166.
Vibration loosens the screw until
it Falls out or works the ball stud
loose From the Friction receptacle on
the back oF the turret wall bracket.
Either way, the top oF the screen
sags outward and the next time the
turret is traversed, the screen snags
and rips cables and connectors.
You can stop loose screws
by applying a little sealant
compound,
NSN
8030-00-
081-2339,
to
the
threads
beFore you tighten them. Also,
put a fat washer, NSN 5310-
01-389-9681,
between
the
screw and the screen.
IF the ball stud comes loose in its receptacle, use pliers to pinch the two tabs on the
Friction receptacle back together. That provides enough tension to hold the ball stud
in place.
IF one oF the tabs breaks oFF, replace the Friction receptacle with NSN 5340-01-
100-8138.
T
here’s been a rash oF blown steering gear seals on the M1117 armored security
vehicle (ASV) and M1200 Armored Knight ±re support vehicle (²SV) lately.
Why?
Some mechanics haven’t been careFul enough when connecting the hydraulic
system’s supply and return lines. IF the quick-disconnect isn’t Fully seated, the
hydraulic system will over-pressurize, causing a blown seal on the steering gearbox.
A blown seal makes the vehicle NMC!
When connecting the supply and return line quick-disconnects, make sure there’s
no more than a
1
/
8
-in gap between the shoulder oF the male end and the top oF the
Female end. A wider gap means the hose line isn’t properly connected.
This problem is happening more and more oFten aFter annual services. So beFore
you ±nish with services, eyeball the hydraulic line connection For the correct gap.
Sealing compound keeps screws tight
Vibration makes ball stud slip loose
Stop The ScrEn Play
CORRECTLY CONNECTED
INCORRECTLY CONNECTED
M1117 ASV, M1200 Armored Knight…
Quick Check for the Quick-Disconnect
why so
Glum,
chum?
my hydraulic
lines weren’t
connected
right…
…and
now I’m
nmc
!
better get
someone to check
yours
before it’s
too late!
M1 Series Tanks…
Stop The ScrEn Play
all these
bumps
have
me pretty
shaken!
I hope my crew
remembers to
tighten down
my
turret basket
screens or there
could be
trouble!
Check gap between shoulder of male end
and top of female end
Gap wider than
1
/
8
-inch?
Quick-disconnect isn’t connected properly
728 04-05.indd
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6/3/13
10:39 AM
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