PS Magazine - TB 43-PS-692
PS, The Preventative Maintenance Monthly
ISSUE 692
JULY 2010
6
PS 692
JUL 10
7
PS 692
JUL 10
Level Check
Check the oil level during semiannual services. It’s a cold-check, so make sure it’s done
before the vehicle is operated. Here’s how:
1.
Remove the oil level plug. If the Fnal drive was overFlled, let the excess oil drain
into a container for proper disposal. You may see a small amount of oil—two or three
tablespoons—spill out. Don’t worry. That’s likely the little bit of oil that can get trapped
behind the level plug.
2.
Take a close look at the level
plug itself. The plug’s magnetic,
so you may see metal chips or
shavings. If you spot any, the AVLB
is deadlined.
3.
Make sure the oil level is up to
the lower edge of the plug hole
by carefully inserting your Fnger
and feeling for oil.
4.
If the level’s good, clean the
level plug and reinstall it.
Low Level?
If the oil level is low, you’ll need to add
some OE/HDO-15/40:
1.
Reinstall the level plug.
2.
Remove the Fll plug and add oil.
3.
Give the oil a few minutes to settle, then
recheck the oil level.
4.
Repeat steps 1-3 until the Fnal drive is
Flled. Just be careful not to overFll it.
5.
Clean and install the Fll and level plugs.
The J-hooks on both sides of
the boom are designed to guide
the boom cable and keep it out of
trouble. If you allow the cable to
slip out of the J-hooks, two things
can happen:
1.
If the cable is tight as the
boom is lowered, it gets squashed
between the travel lock and the
boom. That flattens the cable and
can snap some of the strands.
2.
If there’s some slack in the
cable, it can get caught under the
travel lock latch and rip it loose as
the boom is raised.
If you said during the last semiannual service,
go to the head of the class.
If you gave a different answer, those Fnal
drives could be flunking out right along with
you. When Fnal drive oil levels get low, there’s
more friction. Metal shavings begin to show up,
which means the drives are being damaged.
To keep those Fnal drives in good shape,
do your homework. The textbook to use is the
semiannual PMCS in TM 5-5420-202-20-1 (Oct 85
w/Ch 4, May 96) and LO 5-5420-202-12 (Mar 92).
M88A2 Recovery Vehicle…
Let PM Be Your Guide
AVLB…
A Little Lesson on Levels
a little guidance.
that’s what
the boom
cable on
your m88a2
recovery
vehicle needs
when raising
and lowering
the boom,
crewmen.
without
that
guidance,
damage is
lurking just
around the
corner.
either
situation
can give you
headaches,
so accept a
little guidance
yourself—make
sure the cable
is threaded
over
the
j-hooks!
If boom
cable slips
out of
J-hook…
…it can hook
under travel
lock and rip
it loose when
boom is raised
Remove level plug and use Fnger to check oil level
Use Fll plug
to add oil
A little test,
mechanics…
When was the
last time
you checked
the oil level
in the final
drives for
your unit’s
AVLBs?
692.06-07.indd
1-2
6/1/10
5:42:50 PM
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