Pumping from Draft

TM 5-4210-233-14&P-1

2-13. FIREFIGHTING OPERATIONS - Continued

NOTE

If pumping from vehicle water tank, be sure water tank is full.

When pumping from draft, all valves must be closed to prevent

air leaks.

d. Pumping from Draft.

(1) Close all valves.

(2) Connect "hard" suction hose to SUCTION connection, and attach suction strainer to intake end of

hose.

(3) To get full capacity and a quick prime, and to maintain pump efficiency:

(a) Position vehicle as near as possible to water supply.

(b) Use side inlet to attain full capacity.

suction inlet

NOTE

Air pockets in suction hose may cause loss of prime or erratic

pump action, and may reduce pump capacity.

(d) Make sure all suction connections and suction caps are tight, and all discharge and drain

valves are closed.

(e) Immerse suction strainer at least two feet below water surface to prevent pump from drawing

air.

NOTE

Whirlpools forming above suction strainer indicate that strainer

is too close to surface of water.

(f) Make sure suction strainer is far enough from bottom to prevent pumping sand, gravel,

and other foreign matter.

NOTE

The amount of material in suspension in lakes, ponds, and

streams will gradually wear impeller hubs and wear-ring

surfaces. Under favorable operating conditions, these parts

have a long life; however, the presence of sand and gravel in

the drafted water may seriously impair pump efficiency and life.

(4) With the engine at idle speed, select PUMP mode using the ELECTRIC PUMP SHIFT switch on

the cab instrument panel.

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