PS Magazine - TB 43-PS-569
PS, The Preventative Maintenance Monthly
ISSUE 569
APRIL 2000
PS 569
5
APR 00
APR 00
HMMWV . . .
Less Heat, Less Damage
T
ired of having to pry swollen dashboard light lenses
off your HMMWV to replace a burned-out bulb?
Replace the bulb that produced so much heat that it
caused the lens to swell with a cooler-operating LED
kit, NSN 5980-01-438-8939. The kit contains the LED
and a clear lens.
If you need just the LED, order NSN 5980-01-438-
7452. Get the lens only with NSN 6220-01-429-4596.
Standard bulbs swell
lenses, so use LEDs
o way oil is supposed to be in your
M939-series truck’s air filter, but there
it is. So where did it come from?
Oil-fouled air filters often start with
an overfilled fuel tank. But how does
that happen?
The fuel tank, transmission gear case
and transfer gear case all vent into the
air cleaner duct. Fuel from an over-
M939-Series Trucks . . .
Stencil tanks
Showing red?
Consider, too, that the oil in these
components may contain fuel. If so,
change the oil.
If either gear case is low, support
can check the transfer interlock air cyl-
inder for leaks.
A good reminder not to overfill the
fuel tank is to paint a line two inches
from the top of the tank. Then, stencil
“CAUTION: Do not fill above this line
to allow for expansion” in 1-in black
Regardless, if the air restriction in-
dicator in the cab shows red, check the
air cleaner. If it’s oil-clogged, check
the levels in the transmission and trans-
fer gear cases. If they’re overfilled,
have your mechanic drain the excess.
Check air cleaner housing for oil
filled tank can run through the
vent
s...
and end up in the gear cases.
Then, oil from the overfilled gear cases
is forced out through the vent
line
s...
and ends up in the air filter.
It’s also possible that a leaking inter-
lock air cylinder can pressurize the
transfer and push oil into the air filter.
letters as shown in Fig 17 of TB 43-
0209,
Color, Marking and Camouflage
Painting of Military Vehicles, Construc-
tion Equipment and Materials Han-
dling Equipment
(Oct 90 with Change
1, May 91).
4
man, look at
this
mess
in the
air cleaner
element
!
could
be someone is
overfilling
the
fuel tank
.
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