PS Magazine - TB 43-PS-712

PS, The Preventative Maintenance Monthly

ISSUE 712

MARCH 2012
PS Magazine - TB 43-PS-712 - Page 24 of 32
44
PS 712
MAR 12
45
PS 712
MAR 12
Dear Editor,
I have a good idea to pass on to troops in the field. It’ll protect the
M1022A1 dolly set’s hydraulic cylinders and save the Army money.
Nowhere in TM 9-2330-390-14&P, the TM for the M1022A1 dolly
set, are instructions found about protecting the lift cylinders and the
positioning cylinders-its hydraulic cylinders-from weather damage. The
operator’s PMCS only tells you to clean and lube. The organizational
PMCS says only how to lube. We need some way to prevent the push rod
in the cylinder that’s exposed to the weather from pitting, which leads to
cylinder replacement.
Another
way
to
protect
hydraulic
cylinders
and
stop
corrosion
before
pitting
starts
is
by
exercising
the
cylinders
weekly.
That
spreads
a
thin
coat
of
hydraulic
oil
on
the cylinder rods. But if you can’t exercise the equipment, put a
thin coat of GAA on the rods.
And if your dolly set is going to sit unused for more than a
month, you can also coat the cylinder rods with GAA and
wrap them with waterproof paper. Then use moisture-
resistant sealing tape, NSN 7510-00-852-8180, to hold
the paper in place.
By the way, TACOM LCMC told us there is a
$364 protective bellows assembly, NSN 5340-01-
573-1239, PN 8D00411-1, made from special
weather and sun-resistant material.
Editor’s note:
Thanks for that
useful tip, Mr. Hart.
Readers, remember
that corrosion is no
friend to your dolly
set. It ruins cylinder
rods. In fact, it can
pit the rods so badly
that seals can’t
prevent Fuid leaks.
Once the leaks go to
Class III, your dolly
set becomes NMC.
Hydraulic cylinders aren’t cheap. A new lift cylinder assembly costs
about $2,273 and a new positional cylinder assembly costs about $1,562.
I suggest that units get tube-type pipe insulation from a local hardware
store and put it around the exposed push rod on the cylinder. This should
cut down on cylinder replacement and save money.
Richard Hart
Production Supervisor
FLRC Hood
M1022A1 Dolly Set…
Corrosion ruins cylinder rods
brings protective bellows
you can
help
your
dollies by
using the
following
tips.
Well, hellO
dolLies! are
you ready to
take those
containers to
the field?
I’m a bit
rusty.
I
neEd some
help here!
I’m ready and
rarin’ to go!
712 44-45.indd
1-2
1/23/12
5:07 PM
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