PS Magazine - TB 43-PS-555
PS, The Preventative Maintenance Monthly
ISSUE 555
FEBRUARY 1999
Bolt head should face gun stop
echanics, if you get a faulty gun
elevation drive (GED) gearbox read-
ing when troubleshooting a Bradley
with the STE-M1/FVS, don’t panic.
The fault could be the result of a back-
ward bolt.
While testing the GED, you have to
raise the 25mm gun to full elevation.
If either of the bolts, NSN 5305-00-
781-3927, holding the rotor rain cover
in place was installed backwards, the
bolt shaft will jam against the gun stop.
That stops the gun from reaching full
elevation.
M2/M3-Series Bradleys . . .
If you
still
get a GED fault reading,
there’s one other thing to check.
Check the bolts. If the heads are not
facing the gun stop, reverse the hard-
ware. That’ll provide enough clearance
to bring the gun all the way up.
i keep getting
faulty
g-e-d gearbox
readings
on this
bradley!
hm-mmm,
could be a
backward
bolt
or a binding
eyebrow lip
.
16
i hope they
remember to check
my
track guards
when we stop!
D
rivers, when doing AFTER operation checks on your Bradley’s suspension
system, zero in on the track guards.
Vibration combined with the constant bumps and bangs of field operation
will loosen the bolts that hold the guards in place. If the guards fall off, the track
can bind or even break.
While you’re looking for loose bolts,
eyeball the guards for chipping or crack-
ing. Either could make the guards fail.
Report loose or damaged guards to
your mechanic. He’ll tighten the bolts to
151–166 lb-ft or replace the guards if
necessary.
Track guard bolts loose?
...so hold eyebrow back when raising gun
The roller on the ballistic sight cover’s connecting link, NSN 3040-01-319-
9000, can catch on the lip of the supplemental armor cover (eyebrow) as the gun
comes up. That causes just enough hesi-
tation during elevation to cause a GED
fault.
If that’s the
problem, get
someone to
lift up the eye-
brow as the
gun is raised.
Roller hits lip.
..
Guard the Guards
PS 555
17
FEB 99
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