PS Magazine - TB 43-PS-573
PS, The Preventative Maintenance Monthly
ISSUE 573
AUGUST 2000
PS 573
7
AUG 00
PS 573
6
AUG 00
ne of the items most often broken in the central tire inflation system on
M939A2-series trucks is the nipple on the wheel inflation turret valve.
That’s because it’s right out
in the open where soldiers put
their big feet when they climb
on board from the side.
In the past, it was $12+ to
replace the turret valve be-
cause the nipple wasn’t avail-
able as a repair part. Now you
can save at least $10 by or-
dering the nipple—called a
pneumatic tank valve, NSN
Now that you’ve saved
some money, help save yourself some repair time by convincing
soldiers to climb in from the rear of the truck using the tailgate.
o lube more or to lube less in the
desert. Which is the correct answer?
It depends. Don
’
t you just love that
answer? But it
’
s true. It depends on
whether you
’
re talking about sealed
bearings and surfaces or external gears
and surfaces.
Here
’
s how to remember what to lube
under desert conditions:
•
If the component has a lube fitting,
grease it every day. Wipe the fitting
clean before you pump in grease.
That way, grit doesn
’
t get pumped
into the fitting
—
and
into the bearing.
Tactical Vehicles . . .
Eyeball your lube orders and TMs for any
specific references to desert lubrication.
Pump until you see new grease com-
ing from the seal or relief valve. That
gets rid of the old grease and any grit
that
’
s inside. Wipe off the excess grease
so more grit isn
’
t attracted to moving
parts.
•
External surfaces and gears should
get the least lube necessary to provide
free movement. That
’
s because any
lube on those surfaces and gears at-
tract grit. The grit and lube act like
sandpaper, wearing out seals and gears
quickly.
Grease lube
fittings daily
M939A2-Series Trucks . . .
less!
more!
these guys
should know
it depends on
the surface.
External gear or surface? Use little or no lube
W
A
T
C
H
W
H
E
R
E
Y
O
U
’R
E
S
T
E
P
P
I
N
G
,
B
U
D
D
Y
!
Careless feet damage turret valve nipple.
PS 573
7
AUG 00
PS 573
6
AUG 00
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