DRAFT
TM 5-4210-249-13&P-1
OPERATOR MAINTENANCE
FOAM AGENT FILLING/DRAINING/FLUSHING
FILLING FOAM AGENT TANK
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TFFT02224
CAUTION
Do not mix different types or brands of foam agent in foam cells or piping. Mixing
of different foam agents (either type or manufacturer) may cause deterioration of
foam agent, improper proportioning and poor performance in a fire situation.
Mixing of Class A and Class B foam agents may result in a chemical reaction which
can create globules, which can clog orifices and cause system failure.
Do not spill foam agent on pressure/vacuum vents. Clean any spilled foam agent
before continuing with procedures. If vents become blocked, pressure could build
up in tanks and may cause damage to equipment.
When filling foam agent tank during a non-fire situation, following procedure is recommended:
1.
Vehicle should be parked on a level surface.
2.
Make sure all water and other contaminants have been drained from foam tanks before filling.
3.
Make sure FOAM TANK DRAIN valves (1) are in CLOSED position.
4.
Make sure FOAM SYSTEM switch (2) is in OFF position. Indicator light (3) will be out.
5.
Unstow passenger side rear access ladder (WP 0013).
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0031-1
