PRINCIPLES OF OPERATION (CONT) - TM-3-4230-209-20-P0024

TM 3-4230-209-20&P

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port (19) is pressurized whenever the pump is operating. VALVE NO. 1 MANl-

(8) Once water reaches the centrifugal pump (6), VALVE NO. 4 (2)

FOLD (20) controls the water to the upper manifold (21) and upper discharge

should be placed to CLOSE because the pump no longer needs to be primed.

port (22). VALVE NO. 2 LOWER REEL (23) and VALVE NO. 3 UPPER

(9) The water pressure in the pump unit subassembly is ready to be

REEL (24) control water to the lower and upper hose reels respectively.

used. Usage depends on the mode of operation needed. The lower discharge