PS Magazine - TB 43-PS-717

PS, The Preventative Maintenance Monthly

ISSUE 717

AUGUST 2012
PS Magazine - TB 43-PS-717 - Page 7 of 33
11
PS 717
AUG 12
Manhole Gasket Reminder
It only takes a moment of carelessness to poke a hole in the manhole cover gasket
on the water trailer.
If you don’t get the cover
latches out of the way, any
time the cover is closed, the
gasket takes a poke. A hole
in
the
gasket
can
lead
to
contaminated drinking water.
Besides making sure the
latches are out of the way,
lock the cover open while
Flling the tank. That way, the
cover can’t close until you
want it to.
Better Seal Deal
There’s an improved manhole cover seal that will make leaks a thing of the past.
But that seal, NSN 5330-01-317-9640, is only as good as its installation.
Here’s what to do:
1.
Remove the manhole cover.
2.
Scrape off the old seal and toss it.
3.
Sand the outer 1½ inches of the
underside of the cover with emery
paper.
4.
Use denatured alcohol to wash
the sanded area. Be careful not
to touch the sanded and washed
area with your bare hand. Oil or
dirt from your hand can keep the
sealant from working properly.
5.
Let the cleaned area dry.
6.
Spread a 1-in wide band of silicone
adhesive, NSN 8040-00-118-2695,
around the outside cover.
7.
Slip the seal onto the cover.
8.
Put a little more sealant around the inside of the seal where it meets the cover.
9.
Now lay the cover with the seal side down on a smooth, flat surface, such as a
work bench. Let the sealant cure for 24 hours. (We think it’s a good idea to also
put some type of cover on the manhole of the trailer to keep out contamination.)
10.
Rinse the cover with clean water.
11.
Install the manhole cover on the tank.
M149A2 Water Trailer…
Good
Ways
to Keep
Water
Flowing
Morale can take a
real plunge
if the water
in your unit’s water
buffalo goes
bad!
especially
if there’s no
other drinking
water around!
So make sure you use these PM
pointers
before
you take your M149A2
water trailer out to the field.
Keep latches away from manhole
Lock cover
open when
filling tank
Spread silicone adhesive here
Someone
help
me!
have
mercy!
What
happened
here?
A
cholera
epidemic?
Worse!
Our Buffalo
really needs
cleaning out!
it
wasn’t
me…
it
isn’t
me… Oh,
no! it
is
ME!
717 10-11.indd
1-2
6/22/12
11:46 AM
Click here for a copy of this article to save or email.
Back to Top
Back to Top