ANSUL Cartridge Dry Chemical Fire Extinguishers
Models 10, 20, 30, Operation, Inspection, Service and
Maintenance, and Recharge Manual (Form No. F-7674)
2018-OCT-15 REV. 10 PAGE 11
MAINTENANCE
MAINTENANCE (Continued)
13. Operate the puncture lever to make sure the lever works
freely. Inspect the cutting edge for sharpness. A bent
or dull puncture pin could hang up and not puncture
the cartridge seal disc cleanly. (See Service and Repair
Section for pin replacement.)
14. Check the pressure relief vent in the cartridge receiver
for obstruction. This relief vent may be a small hole in the
receiver collar, or a set of grooves in the threads. The
pressure relief vent provides an audible signal and a safe
vent if a cartridge is unscrewed while there is still pres-
sure inside. A stiff wire or a bristle brush may be used for
cleaning.
15. Remove and examine gasket in the cartridge receiver.
Replace if brittle, compression set, cracked, cut or
missing. Lightly lubricate with a good grade of silicone
grease or equivalent and reinstall.
16. Make sure the extinguisher shell does not contain any
pressure by slowly loosening the fill cap approximately
3-4 turns. If the extinguisher contains any pressure, it
will be relieved through the relief grooves in the cap.
Re-tighten the fill cap, until flat gasket makes contact with
the cover.
17. Carefully examine the hose assembly. A cut, cracked,
abraded or deformed exterior may constitute a potential
rupture upon pressurization and require replacement.
18. Check the hose couplings. Corroded or cracked
couplings, cross-threaded or worn threads dictate
replacement.
14 003182 13 000910
15 003206 16 003175
17 003207 18 003252
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