PN 08220
04/2020
COMPLETE MAINTENANCE (SIX
-
YEAR TEARDOWN) PROCEDURE
1.
Discharge powder and pressure into a "closed" dry
-
powder recovery system (several are commercially
available). Make sure that the extinguisher is completely empty and depressurized.
CAUTION: Do not contaminate by mixing with other types of dry powder or dry chemical.
2.
Perform all required maintenance in Steps1 through 8 of "
Maintenance Procedure
" (Annually).
3.
VERIFY THAT NO PRESSURE REMAINS IN THE EXTINGUISHER
(slowly squeeze discharge lever,
aiming away from persons or objects, which might be injured or damaged). Remove the valve assembly
from the cylinder and inspect it for signs of corrosion or damage to the threads. Replace parts as
necessary.
4.
Complete steps 2 through 13 of Recharge Procedure.
TROUBLESHOOTING GUIDE
PROBLEM
CORRECTIVE ACTION
1
Leak at operating valve col-
lar O
-
ring
Remove valve assemble, clean collar thoroughly and install new collar
O
-
ring. Lubricate with Bluestar V
-
711
2
Leak through valve
Install new valve stem assembly. Check valve seat scratches or foreign
matter. Install new valve stem assembly
3
Leak around gauge thread
Remove gauge*, and reinstall using Teflon tape on the gauge threads.
4
Defective gauge
Remove defective gauge*, and install a new gauge using Teflon tape
on the gauge threads.
5
Leak in the cylinder
Contact Amerex if under warranty, otherwise mark
“
Rejected
”
and re-
turn to owner.
*
Pressure gauge threads are coated with a special epoxy at the factory. For easy removal soak the
valve assembly ( minus the downtube assembly) in hot water (180°F/82°C) for two to four minutes.
Remove gauge with a
7/16”
open
-
end wrench.
FOR REPLACEMENT PARTS SEE THE AMEREX PORTABLE AND WHEELED
PARTS BOOK PN 27277 AVAILABLE AT http://www.amerex
-
fire.com UNDER
MANUALS OF THE RESOURCE SELECTION.