PS Magazine - TB 43-PS-697

PS, The Preventative Maintenance Monthly

ISSUE 697

DECEMBER 2010
PS Magazine - TB 43-PS-697 - Page 25 of 33
46
PS 697
DEC 10
47
PS 697
DEC 10
Bookmark Battery Calculator Site
The Army’s rechargeable battery program has a downloadable battery calculator called
POWER. This calculator helps you determine the right battery for the equipment and the
job. This site is updated often and recently has added more battery runtimes. So, add this
site to your list of Internet favorites and check it often:
SINCGARS External Antenna Connector
The external antenna connector, NSN 5935-01-386-0360, for the RT-1523, -1523B and -1523C
has been changed. It’s now a snap-on connector instead of one that needs to be soldered.
But it needs a new internal circuit card. Order both the new card and the connector with
i
t’s no secret that hydraulic hoist cylinders on M929- and M930-series dump trucks
are known to leak. Some leak just a little, others leak a little more. Matter of fact,
they’re supposed to!
Your truck is not NMC unless the leak adds up to more than a quart a day, or the
cylinders won’t lift an empty dump body.
That’s because single ram
cylinders must leak enough to
keep the cylinder rod coated
with oil and the seal wet. The
oil protects the rod from the
elements and corrosion.
Telescoping cylinders, like
the ones on these dump trucks,
have seals at each section of
the cylinders that leak for the
same reason.
C
onstruction operations cause the drive sprocket teeth on your dozer to wear down.
Over time, enough wear can let the dozer’s track jump right off the sprocket!
So before the day’s run, check your dozer’s teeth. Use a drive sprocket gage
to measure sprocket wear. Order a gage to measure the D5B’s sprockets with PN
5P8616 and CAGE 11083 from RIC S9C on a DD Form 1348-6. NSN 5210-01-225-
1132 gets a gage for the D7G and D8K dozers.
•±
Set the point of the gage marked for
your tractor between the teeth of the
drive sprocket.
•±
If the point doesn’t touch, the
sprocket’s OK.
•±
If the point touches, the sprocket is
shot and needs to be replaced by support.
Dump Trucks…
hoist
cylinders
should
leak!
D5B, D7G and D8K Tractors…
Gage the Sprockets
here’s how
to gage the
sprockets…
gage the
sprockets
every 1,000
hours or
when you can
no longer
adjust the
track.
If point
touches
between
teeth—
get drive
sprocket
replaced
we’d better
check those
teeth!
but I
just
saw the
dentist!
Hoist cylinder seeps to lube seal and coat cylinder
hey buddy! one
of my hydraulic
hoist cylinders
is
leaking!
not
necessarily!
does that
mean I’m nmc?
697.46-47.indd
1-2
11/1/10
5:44 PM
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