PS Magazine - TB 43-PS-668
PS, The Preventative Maintenance Monthly
ISSUE 668
JULY 2008
16
PS 668
JULY 08
17
PS 668
JULY 08
They’re adding oil to the vehicle’s
fuel tank when they refuel with JP-8.
These “home brews” have also included
adding power steering or brake fluid
or transmission or engine oil to the
vehicle’s fuel system.
Jp-8
is a kerosene-based fuel that
may break gunk and contaminants free
from the sides of the vehicle’s fuel
tanks and lines.
After your vehicle makes the switch
to JP-8, pay close attention to the engine.
When it starts to idle or run rough,
replace all the fuel Flters. They’re
clogging up. The clogging should stop
after two or three refuelings. JP-8 does
run cleaner and leaner than diesel fuel,
but that won’t damage the engine.
Some mechanics think it will.
•
Remove the manhole cover.
•
Scrape off the old seal and toss it.
•
Sand the outer 1
1
/
2
inches of
the underside of the cover with
emery paper.
•
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.
•
Let the cleaned area dry.
•
Put a 1-in band of silicone sealant,
NSN 8040-00-118-2695, around the
outside edge of the cover.
•
Slip the seal onto the cover.
•
Put a little more sealant around
the inside of the seal.
•
Now lay the cover with the seal
face down on a smooth, flat surface,
such as a work bench. Let the sealant
cure for 24 hours.
•
Rinse the cover with water.
•
Install the manhole cover on
the tank.
Adding any type of oil to JP-8 means
it
won’t
burn
completely.
Engine
performance suffers, fuel Flters clog
up, and the fuel pump ends up working
overtime—causing it to burn out!
Don’t add oil to the fuel system.
Diesel
Engines…
Don’t Add Oil!!!
M149A2 Water Trailer…
Keep Seal Sealing
I just mixed
up a great
diesel recipe
for you!
NO!
Using your
home brew means
my fuel pump will
burn up!
mechanics, if you see a
leak around the water
trailer’s manhole
cover, replace the old
seal with an improved
seal that comes with
nsn 5300-01-31
7
-9640.
here’s the right way
to make sure the seal
stays put…
Replace leaky seal
Leave
JP-8
Alone!!
don’t add
oil or
any other
fluid!
668.16-17.indd
1-2
6/3/08
3:41:05 PM
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