DRAINING AND FLUSHING FOAM TANKS. (Cont)

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DRAINING AND FLUSHING FOAM TANKS.

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TM-9-2320-279-10-3 M977 Series 8x8 Heavy Expanded Mobility Tactical Trucks (HEMTT) Manual

PUMP AND PLUMBING BLOW-OUT PROCEDURE.

TM 9-2320-279-10-3

Operation Under Usual Conditions (Cont)

2-132. DRAINING AND FLUSHING FOAM TANKS (CONT).

NOTE

Local draining laws must be followed when draining and

flushing foam and water from foam tanks.

a. Put FOAM TANK DRAIN valve handle (4) in open position and drain

water from foam tank.

b. Repeat steps h. through j. until foam is clean.

c. Put FOAM TANK DRAIN valve handle (4) in closed position.

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d. Put foam METERING VALVE (5) in OPEN position.

NOTE

Water must be added into foam tank that is being flushed.

FOAM TYPE SELECTOR switch must be switched to

the foam tank that is being flushed.

e. Run foam system with water instead of foam (para 2-124).

Discharge water until foam tank is empty.

g. All debris must be removed from foam tanks after flushing is complete.

h. Close expansion dome hatch (3).

i. Repeat steps a. through q. to drain and flush foam tank A.

Flush foam system (para 2-128).

2-204