PS Magazine - TB 43-PS-629

PS, The Preventative Maintenance Monthly

ISSUE 629

APRIL 2005
PS Magazine - TB 43-PS-629 - Page 3 of 33
DO AWAY
WITH
DRAGGIN’
DOORS
A
mechanic who tries to install a new rear soft
door on a HMMWV by himself has a lot in com-
mon with one-armed paper hangers. Mainly, he
doesn’t have enough hands to do the job right!
It’s nearly impossible to tighten the hinges
while keeping the door aligned so that the latch
will work when you’re finished.
Your best bet is to get a second person to lend
a hand. Have your helper hold the door so the
latch lines up. Then, reach in through the opened
window of the door and tighten the hinges.
PS 629
APR 05
3
HMMWV…
M
echanics, how the HMMWV’s fan shroud holds up has a lot to do with how well
it’s installed. You can’t just bolt it in place and expect it to come back in one piece.
You need to properly adjust the fan shroud to ensure there’s enough clearance
between it and the fan blades. Otherwise, the blades hit and crack it during opera-
tion. You may even shatter a fan blade.
Closely follow the installation instructions that start on Page 3-110 of TM 9-
2320-280-20-2 to install the shroud properly.
Don’t Forget Strap
After the shroud is properly positioned, don’t forget to attach the radiator retain-
ing strap, NSN 5340-01-251-0724. It secures the top of the shroud to the radiator.
Without it, the shroud
moves around and hits the
fan blades. Once again you
have a damaged shroud.
Just lock the strap in
place with a blind rivet,
using the blind riveter from
the organizational mainte-
nance tool kit.
Replace or Repair?
If the shroud does have minor damage, you can repair it using the fiberglass
repair kit, NSN 2090-00-372-6064. Cracks and breaks that you can fix without
removing the shroud are considered minor. Major damage means you’ll have to
replace the shroud.
Secure
retaining
strap with
blind rivet
don’t look
now, but I
think your
door’s
draggin’!
yeah… my
mechanic insisted
on installing it
by himself.
it’s a
two-
person
job!
installing that
new fan shroud
went pretty
smooth! Why don’t
you start ‘er up?
WHOA!
what
the heck is
that!?
That
is the sound of
the new fan shroud
being
shredded!
OK.
Location Is
Everything
629.02-03(C)
2/21/05
4:19 PM
Page 1
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