DRAFT
TM 5-4210-249-13&P-1
OPERATOR MAINTENANCE
FOAM SYSTEM GENERAL INFORMATION
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TFFT00328P
CAUTION
Do not mix different types or brands of foam agent in foam tanks 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.
When in foam mode never open TANK FILL & RE-CIRCULATING LINE valve. This
will cause foam agent to enter water tank. If re-circulation is needed to keep pump
cool, open PUMP COOLER valve.
1.
Foam system operation from cab (turret operation) requires system pressure of at least 200 to 210 psi (1,379
to 1,448 kPa) for proper proportion.
2.
Foam system operation from pump operator's panel requires system pressure of at least 125 to 250 psi (862
to 1,724 kPa) for proper proportion.
END OF WORK PACKAGE
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