PS Magazine - TB 43-PS-617
PS, The Preventative Maintenance Monthly
ISSUE 617
APRIL 2004
M40/M42-Series Masks…
Gimme
Some Skin!
T
o use the M40/M42-series masks
with either the quick doff hood or the
joint service lightweight integrated suit
(JSLIST), you need either the universal
second skin (USS) or second skin (SS).
Without a skin, you won't have complete
head and neck protection against chemi-
cal agents.
The USS comes in 2 sizes:
small,
NSN 4240-01-413-1540, and medium/
large, NSN 4240-01-413-1543. The SS
is no longer produced. When you need a
replacement, order the USS.
PS 617
APR 04
46
M17-Series Decon…
L
oose belts make deconning difficult for your M17 decon.
Slipping belts keep water and fuel pumps
from pumping. A loose belt eventually slips
off and shuts down the M17 completely.
So check the water pump belts before you
go on a mission. If they seem loose, the
belts may have stretched and need to be
adjusted. Loosen the two bolts holding the
belt tensioner and slide tension until the
roller touches the belts. Then slide the ten-
sioner another 1/4 inch and tighten the bolts.
If the belts are cracked, they have dry rot
and should be replaced before they break.
Always remember to replace both belts.
They are a matched set.
Belts last longer if you remove
them when the M17 sits for long
periods in the motor pool. When the
belts are left exposed to the weath-
er, they stretch and rot much faster.
Loosen the belt tensioner and rotate
the belts on and off their pulleys.
Do the same for the fuel pump
belt by applying pressure to pivot
the fuel pump, which loosens the
belt and lets you take it off.
Store all belts in the M17 tool box.
Repairmen, the NSN for the engine drive/water pump belt (Item 2, Fig C-4 in TM
3-4230-228-23&P) has been changed to NSN 3030-01-238-2368.
Remove belts when not operating
Universal
second skin
needed for
M40/M42
masks
Fix loose belts by adjusting tensioner
like a
Universal
second
skin!
I can’t do any pumping until
you
do something about
these
loose belts!
617. 46-47 (C)
2/28/04
12:44 PM
Page 1
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