XM Wheeled Dry Chemical Fire Extinguisher
Operation and Maintenance Manual
(Part No. S-50651)
2023-AUG-30 REV. 02 PAGE 11
INSPECTION
INSPECTION
To provide reasonable assurance that the extinguisher is
fully charged and operable, inspections should be conducted
at monthly intervals as follows:
1. Check that the extinguisher is in its designated location.
2. Note the general appearance of the extinguisher. Check for
mechanical damage or corrosion.
NOTICE
On the indicator fill cap models, check the
red indicator stem. If it is in the up position,
a complete maintenance examination must
be performed.
FIGURE 17
002673
3. Check all nameplates for readability.
4. Check the visual inspection seal on the nitrogen cylinder
valve. A broken or missing seal may indicate unreported
operation or tampering with extinguisher.
FIGURE 18
002652
5. Read the cylinder gauge. The pointer should be in black
operating pressure range.
FIGURE 19
002650
6. Check all valve handles are ring pinned and sealed in the
operating position:
Table 4: Valve operating positions
Valve Handle Operating Position
Red Tank Valve
Open
Green Vent Valve
Closed
Blue Hose Clean-out Valve
Closed
Black Dry Chemical Valve
Open
7. If any visual inspection seals are broken or missing, replace
them with Part No. 25940.
8. Rotate the wheels to test the lubrication of bearings. If the
wheels do not revolve smoothly, pressure lubricate the
bearings through grease ttings on the hub.
9. Inspect the nozzle for obstructions. Operate the nozzle handle
to check free movement. Return the nozzle to the holder.
Check that the nozzle handle is forward in the closed position.
FIGURE 20
002654
10. Record the date of inspection, if required.
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