Amerex 05608 - Manual (Page 8)

7
8. Check the nozzle shutoff lever for freedom of movement (open and close several times). If the
operation is impeded, disassemble the nozzle, replace parts and/or properly lubricate as
necessary. Make sure that the nozzle tip is clear and unobstructed.
9. Disconnect the discharge hose from the operating valve. Blow air through the hose and nozzle
assemblies to insure that the passage is clear of foreign m a te ria l. Check the couplings, hose and
hose gasket for damage or deterioration
– replace as necessary. The discharge hose should be
hydrostatically tested to 300 psi (2068 kPa) every twelve years.
10. Inspect the wheels to insure they rotate freely. Lubricate as required.
11. Check carriage assembly for loose nuts, bolts, frame distortion or damage. Check welds for
damage or corrosion. Replace damaged parts or make repairs as necessary.
12. WARNING: Valve removal and/or valve part replacement should be made only
after completing the depressurizing procedures listed in Step 1 of
the Complete Maintenance section.
Remove operating valve assembly. Inspect for corrosion or damage to hose thread connection.
13. Complete steps 2 through 15 of Recharge Procedure.
RECHARGE
WARNING:
a. Before attempting to disassemble, be sure the extinguisher is
completely depressurized.
b. Never have any part of your body over the extinguisher while removing
the valve assembly.
c. Use a protective shield between you and the pressure gauge while
charging an extinguisher. Do not stand in front of the gauge if a shield
is not available.
d. Use a regulated pressurizing source of dry nitrogen only with a
minimum dew point of minus 70ºF (minus 57ºC). Set the regulator to
no more than 265 psi (1827 kPa).
e. Check and calibrate regulator gauge at frequent intervals. The
regulator gauge should be used to determine when the intended
charging pressure has been reached. Do not use the extinguisher
gauge for this purpose.
f. Never leave an extinguisher connected to a regulator of a high
pressure source for an extended period of time. A defective regulator
could cause the cylinder to rupture due to excessive pressure.
g. Do not mix types of dry chemicals in extinguishers, recharge or
recovery systems. Mixing ABC (acidic base) with Regular, Purple-K,
Super-K or Monnex (alkaline base) dry chemicals may result in a
chemical reaction capable of developing a dangerous pressure
buildup.
RECHARGING PROCEDURE
1. Perform steps 1 through 12 of the "Complete Maintenance (Six Year Teardown)" section.
2. Thoroughly clean all parts of the disassembled valve with a soft bristle brush or soft cloth.
Blow the valve out with air or nitrogen. Inspect spring and downtube assembly, and replace
parts if worn or damaged. Install a new valve stem and collar o-ring after lightly lubricating
with Visilox V-711 (do not lubricate the valve stem seal).