PS Magazine - TB 43-PS-574
PS, The Preventative Maintenance Monthly
ISSUE 574
SEPTEMBER 2000
Dear Editor,
During annual gauging and maintenance on the XM296
.50 cal machine
gun, TM 9-1090-214-23&P tells us to fill the buffer assembly until
hydraulic fluid runs out the filler holes. But that creates two problems.
First, you get a mess when you put the filler screws back into an
overfilled buffer assembly.
Second, you can’t clean the threads in the filler holes or apply sealing
compound when the buffer is overfilled.
If the threads in the filler holes aren’t treated
with sealing compound, oil can leak out. As the oil
runs low, the firing rate gets sluggish. If all the oil
runs out, the gun could fire one shot and stop, or
fire at its maximum rate.
We solved these problems by filling the oil buffer to
just below the bottom of the filler holes. That stops
the mess when the filler screws are put in and it lets
us clean the threads and apply sealing compound.
Then, when we insert the filler screws
(with sealant applied) a tight seal is
formed.
Stopping leaks makes for cleaner equipment and avoids potential firing
problems.
WO1 Karl Verley
F Trp, 1/1st Cav
APO AE
hen a big wind brews, make sure your birds are safely anchored to the ground
and won’t fly away on their own.
Typical blade tie-down instructions and aircraft mooring procedures for your
bird are in its –23 TM.
But you should also check out TM 1-1520-250-23,
Aviation Unit and Aviation
Intermediate Maintenance for General Tie-Down and Mooring On All Series
Army Models AH-64, UH-60, CH-47, UH-1, AH-1, AND OH-58 Helicopters
.
It’s the bible for aircraft tie-down and mooring info. It was written after a
major windstorm devastated Ft Hood in 1989, and gives procedures and hard-
ware to keep birds anchored in heavy winds.
This info is being added to individual aircraft pubs as they are updated.
If there are conflicts between an aircraft’s pub and the tie-down manual, the
tie-down TM takes precedence.
For more info on tie-down or mooring for your aircraft, contact AMCOM’s
POC, Lee Bumbicka at (256) 313-4925, DSN 897-4925 or e-mail:
lee.bumbicka@redstone.army.mil
All Aircraft . . .
OH-58D . . .
heh
,
heh
,
i'll
blow
that
bird right
off
the flight
line!
uh-oh!
overfilled
again
!
Good work! That cleans up that
problem. TACOM-Rock Island
agrees with you and plans to add
that change to the TM.
i'm
tied down
and
prepared
for
your
worst
, you
windbag!
PS 574
36
SEP 00
Oil buffer body assembly
Fill to just below bottom of filler holes
PS 574
37
SEP 00
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