PS Magazine - TB 43-PS-568
PS, The Preventative Maintenance Monthly
ISSUE 568
MARCH 2000
PS 568
4
MAR 00
HMMWV . . .
f your HMMWV is holey—that is, if there are lots of holes where equipment
or components were once mounted—you know that dust, mud and water are
getting into your truck.
It’s especially true for holes in or around the rear wheel wells or cargo area.
Keep that bad stuff outside where it belongs with button plugs. There are
hundreds of different sizes of plugs available in Federal Supply Class 5340 on
FED LOG, but here are three sizes (diameter) that might prove most
useful.
You can also use a short bolt, nut and two
washers to plug up holes. Put one washer on
each side of the hole. Be sure the bolt is short
enough that it won’t interfere with or damage
anything around it.
hanging how you apply the cover
seal for the geared hubs on your
HMMWV may help keep oil where it
belongs—and keep water out.
Some folks like the RTV method
shown in Para 6-10 of TM 9-2320-
280-20-2, but they’ve learned that the
sealant starts to dry just as soon as it’s
applied.
To make it work—and keep oil from
leaking out—you’ve got to put the
cover on quickly. Then put sealing
compound, NSN 8030-01-025-1692,
on the capscrews and quickly torque
them to no more than 15 lb-ft.
Hole size
Plug, NSN 5340-00-
1
/
2
inch
205-5244
3
/
8
inch
687-3224
5
/
16
inch
281-9896
Use a
3
/
8
-in hex head socket drive
to remove the plug. Anything else is
likely to round off the plug head and
make removal a real bear next time.
Here’s another method:
Cut a piece of
1
/
16
-in gasket paper,
NSN 5330-00-270-8470, to fit the cover.
You won’t need any RTV under the cover,
but you still need to put sealing com-
pound on the cover capscrews and torque
them to 15 lb-ft.
Easy on the Drain Plug
Finally, take it easy on the drain plug.
Very little torque—8 to 13 lb-ft—is re-
quired to keep the plug in place. That’s
like finger tight plus a little twist of the
wrench.
... and sealing compound on capscrews
PS 568
5
MAR 00
I’VE
DECIDED TO
USE THE
RTV
METHOD
.
YOU’D
BETTER BE
FAST
WITH THAT
STUFF.
Apply sealant here.
..
forget it,
drip! this hmmwv's
holes are
plugged.
heh-
heh
Don’t
overtighten
drain plug
PS 568
4
MAR 00
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