Amerex 05603 - Manual (Page 6)

TROUBLESHOOTING GUIDE
WARNING: Determine the source of a leak before the extinguisher is depressurized. The extin-
guisher must be completely depressurized before any attempt is made to devalve it and correct a
leakage problem. To depressurize – hold the extinguisher in a vertical position and slowly squeeze
the discharge handle. Thoroughly clean all valve parts after depressurization and valve removal.
Amerex CO2 valve bodies and aluminum cylinders are 1-1/8"-12 UNF straight threads. Use a proper
straight thread adapter when hydrostatically testing. When reinstalling the valve assembly, the cyl-
inder must be placed in a suitable securing vice. Lubricate o-ring area only. Threads of straight-
threaded cylinders require no lubricant for proper valve installation. A proper valve installation oc-
curs when the minimum tightness is used to make a leak-tight, valve-to-cylinder seal. Do not over-
tighten valves! (100 ft. lbs. [135.58 Nm] maximum torque). Over-tightening can damage both valves
and cylinders and may lead to unsafe situations that can cause property damage, injury and/or loss
of life.
PROBLEM CORRECTIVE ACTION
1. Leak at collar o-ring
Remove valve assembly, clean collar thoroughly
and install new collar o-ring. Lubricate with
Bluestar V-711 and reinstall valve.
2. Leak through valve
Check valve stem seating area for scratches or
foreign matter. Clean seating area with a tooth
brush and soft cloth. Install new valve stem
assembly.
3. Leak at safety relief nut
Remove safety nut, disc and gasket assembly.
Replace with new Amerex P/N 04000 safety nut,
disc and gasket assembly. Tighten assembly to
250 in-lbs maximum of torque.
4.
Leak during discharge
under discharge lever
Remove valve assembly, downtube, spring and
valve stem assembly. Install new valve stem
assembly. Check valve seat for scratches or
foreign matter.
5.
Leak during discharge at
hose connection elbow
Tighten hose connection at elbow (10, 15, 20 lb).
replace o-ring and/or elbow on 2 1/2 ,5 lb.
6. Leak in the cylinder
Contact Amerex if under warranty – otherwise
mark "Rejected" and remove from service or
return to the owner.