PS Magazine - TB 43-PS-664

PS, The Preventative Maintenance Monthly

ISSUE 664

MARCH 2008
PS Magazine - TB 43-PS-664 - Page 10 of 33
16
PS 664
MAR 08
17
PS 664
MAR 08
Dear Sergeant V.T.M.,
Your problem could be a result of several things. Your Frst step should be to
eyeball TM 9-2320-279-20-1 for a troubleshooting solution. If that doesn’t Fx the
problem, consider these tips that we learned from soldiers in the Feld:
•
Check to make sure the two plastic lines to
the V19 jet sensor are not crossed. If they’re
reversed, the V10 valve won’t open.
•
Make sure the V10 valve hasn’t seized up
while your M978 was sitting. If it has, apply
pressure to free it up.
•
In some RESET M978s, the box under the
hatch has a plug installed on the underside.
Taking the plug out might solve your
problem.
±uel can flow through only when the V10
valve is open. The V10 valve opens as soon
as fuel pressure is available, unless the level
of fuel in the tank is at its maximum level.
When the fuel level rises to the full level, the V10 valve closes, preventing the tank
from being over-Flled. The plug could be giving the impression of a full tank, so the
V10 valve won’t take on fuel.
•
Replace the valve and see if the new one works. You might
also want to disassemble and repair the old valve to get it
working properly.
Dear Half-Mast,
We have M978 HEMTT fuel tankers that have just
returned from RESET. Now the V10 valve is a problem.
It allows the tanker to store fuel, but it won’t allow
the fuel to recirculate! What’s the solution?
SGT V.T.M.
The inner and outer lug nuts on the new wheel assembly are the same
ones used on the old 20-inch split-rim assembly. Just remember
not
to mix
the old and new wheel assemblies on the fuel tanker. That would cause instability,
an uneven ride, and excessive wear and tear on the tires and vehicle.
NSN
Part
Wheel, 22.50-in, tubeless
Tire, 11.00 x 22.50-in, load Range “G”
Valve stem
Valve extension, 5-in (inside wheel assemblies)
The old 20-in split-rims, NSN 2530-00-603-5768, are now obsolete on these
vehicles. Since the basic M967 and M969 tankers have the older suspension
conFguration and wedge-type brake system, keep using the 20-in split rims with the
bias-ply tube tires while they are still available in the supply system.
Make sure the two plastic lines to
the V19 jet sensor aren’t crossed
M978 HEMTTs…
R E S E T
a n d
V 1 0
Va l v e s
my v10 valve isn’t
allowing fuel to
circulate!
what
can I
do?
5,000-gal Fuel Tankers…
Wheel Assembly Switch
m96
7
a1, m969a1 and
m969a2 fuel tankers are
switching over to 22
1
/
2
-in
tubeless tires and one-
piece wheel assemblies.
the new wheel assembly
for the m96
7
a1, m969a1 and
m969a2 fuel tankers.
here’s what
comes with
the new wheel
assembly…
listen up
for the
nsns on
my wheel
assembly!
664.16-17.indd
1-2
1/27/08
7:01:56 PM
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