PS Magazine - TB 43-PS-561

PS, The Preventative Maintenance Monthly

ISSUE 561

AUGUST 1999
PS Magazine - TB 43-PS-561 - Page 5 of 34
PS 561
7
AUG 99
PS 561
6
AUG 99
eeping a HMMWV cool in the heat
of summer requires a clean oil cooler
and a clean, straight-finned radiator.
To get the trash out from between
the cooler and the radiator is a real job.
There’s not much room between the
cooler and the radiator, so go with this:
ippers get no respect. Up
and down, over and over again,
with no cleaning and no lubing
no matter how much dirt has
gummed up the teeth.
Then, when the zippers just
can’t zip any more, what do
you do? You try muscle, and
that ruins them.
That’s the story with soft-
top zippers on HMMWVs.
Drivers, before your truck’s
zippers get to the muscle stage,
clean them. Remove grit and
sand caught in the zipper teeth
with an old toothbrush. Then
lube the teeth with zipper lube,
That’ll get you a box of 24
sticks. Bar soap works, too.
If you’ve already ruined a
zipper, use hook and pile tape
to keep your soft top from
flapping until it’s repaired or
replaced.
The hook and pile fix won’t
be waterproof and it isn’t as
strong as a zipper, but it’ll do
for the short term. Get a yard
of 1 inch wide, self-adhesive
hook with NSN 8315-01-115-
7617. Matching pile is NSN
these items are local purchase.
Cut and place pieces of tape
where they’ll do the most
good.
HMMWV . . .
After you’ve finished, remove the
wood blocks and secure the cooler in
place. Straighten any bent fins on the
cooler. Then put the power steering
cooler back in place.
o Clean between the cooler and ra-
diator using only low-pressure water
and low-pressure air.
o Eyeball the radiator fins when the
cleaning is done. Straighten all the bent
fins you can reach with the fin straight-
ening tool, NSN 5120-00-157-2180,
from either of the Common shop sets.
If your set doesn’t have this tool, local
purchase it.
o First, move the power steering
cooler out of the way.
o Then remove the four sockethead
screws and washers that hold the oil
cooler to the radiator.
o Then raise the oil cooler carefully
and place a 2
1
/
2
-in block of 2 x4 under
each corner of the cooler.
Straighten bent fins with tool
Check for trash
Place blocks under
each corner
don't
be
cruel
-
-
keep me
cool
!
there
you go,
nice
and
clean
.
thanks
,
buddy.
and i'll
have you
moving
smoothly
in
a sec.
S
S
S
S
S
PS 561
6
AUG 99
PS 561
7
AUG 99
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