PS Magazine - TB 43-PS-699
PS, The Preventative Maintenance Monthly
ISSUE 699
FEBRUARY 2011
16
PS 699
FEB 11
M
echanics, make sure the quick-disconnect couplings are good and tight when you
swap out a front or rear module on the MK II or MK III Husky.
A loose connection causes hydraulic oil in the power steering pump to back up.
When oil can’t fow—and has no place to go—guess what? All that pressure causes
the pump to crack and leak. Enough of a leak means no oil, causing the pump to burn
out. When that happens, you won’t have any power steering—not good!
So, do yourselF a Favor. Make sure the couplings are good and tight! Also, when
the couplings are removed during maintenance, make sure the locking bearings in
the female coupling slide back and forth freely. Stuck couplings may be clogged with
dirt and sand.
Damaged couplings? Replace the Female coupling with NSN 4730-01-554-8869.
NSN 4730-01-555-5385 gets the male coupling.
One reason for this failure is that the hatch is opened from the rear position before
the forward latch is completely closed to the second detent. When that happens, the
added leverage can result in a cracked or failed bracket.
Prevent
this
problem
by reviewing and doing
the opening and closing
procedures for the cargo
shell hatch. That’s found
in Para 2-32 on Pages
2-96-2-97 oF TM 9-2320-
387-10 (Oct 97, w/Ch 6,
Jun 09).
Some units have welded
the brackets as a quick ±x,
but that’s
not
an authorized
repair. The truck headshed
has
approved
a
much
stronger bracket with the
same ±t and Function and
similar form as the original
bracket.
MK II and MK III Husky…
Steering
Pump
Damage
Up-armored
HMMWVs…
The
Buzz
on Cargo
Shell HatCh BraCkets
Look for hydraulic fluid leaks here…
Partially
latched
Fully
latched
…and here
Front module
Rear module
Make sure pin is fully latched and lever is flush
with latch mount when closing cargo shell hatch
Lever
Latch mount
Latch mount
Lever
Pin
Pin
hey,
soldier!
you may not be
current on the
latest buzz, but
here’s something
you need to know.
word from
the field is that
cargo shell
hatch brackets
are
cracking
on m1151, m1151a1,
m1151a1 w/b1 and
m116
7
hmmwvs.
I have
no power
steering!!!
those cracks
will put your
vehicle in nmc
status if you’re
hauling equipment
in the cargo area.
699.16-17.indd
1-2
12/27/10
4:44 PM
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