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Operation Under Rainy or Humid Conditions
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TM-5-4210-205-12 Truck Fire Fighting; Powered Pumper; Foam and Water 500 G.M.P.; Centrifugal Pump Power Take Off Driven; 400 Gal. Water Tank 40 Gal. Manual
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Chapter 3. OPERATOR AND ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
(a)
Remove fire extinguisher from
(f)
Attach  valve  assembly  and
its location.
tighten swivel coupling nut on the new cylinder and
place fire extinguisher in mounting bracket.
(b)
Break seal by pulling safety pin
(g)
Adjust  instruction
band  on
from handle.
cylinder  to
show
maintenance  and
operating
(c)
Point horn at base of flame.
instructions.
(d)  Press trigger for discharge and
(4)
Maintenance. Weigh fire extinguisher
direct stream at base of flame.
every 3 months, and replace cylinder if gross weight has
(e)
Replace cylinder immediately
decreased 4 ounces or more. Lubricate cylinder neck
after using.
threads with one drop of OE 30 oil before reassembly.
(3)
Replacement of Cylinder. To replace
b.
Foam Type.
cylinder, perform the following:
(1)
Description.
The foam type fire
(a)
Press lever to release pressure
extinguisher is similar in size and appearance to the
from used cylinder.
soda-acid extinguisher but differs in internal construction
and extinguishing agent.
(b)  Loosen swivel valve coupling
nut and remove valve assembly from used cylinder.
(2)
Operation.
Remove  the  foam
extinguisher  from  its  location.
Invert  the  fire
(c)
Remove instruction band from
extinguisher  permitting  the  contents  of  the  two
used cylinder.
chambers to mix, and flow from the hose.
(d)
Place
new
cylinder
through
(3)
Refilling  and  Maintenance.
For
instruction band.
detailed instructions on refilling and maintenance, refer
(e)  Replace safety pin in valve and
to TM 5-687 and TM 9-1799.
seal pin with sealing wire.
TAGO 6839A
30

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