TM-9-2320-328-13-P-1

HEMTT-BASED WATER TENDER (HEWATT)

TECHNICAL MANUAL; OPERATOR’S AND FIELD LEVEL MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST); PART 1 OF 3

MARCH 2009

TM-9-2320-328-13-P-1 - Page 383 of 1318

TM 9-2320-328-13&P-1

0057-3

DRAFT

0057

Change 1

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HWT0353A

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NOTE

•

Ensure system air pressure is at least 85 psi (586 kPa) during this procedure.

System air

pressure is required to activate valves.

•

Do not engage PUMP PTO during this procedure, except when performing complete

system checks.

Valve operations can be checked without water pump operation.

•

Valve operations can be checked by observing valve shaft rotation.

Valves are open when

tabs or yellow paint tabs are aligned with direction of fluid flow.

.

Step 2.

Push battery disconnect switch to on position (WP 0004).

If system air pressure is

below 85 psi (586 kPa), start engine and allow system air pressure to build to at least 85

psi (586 kPa) (TM 9-2320-422-10).

Then shut off engine (TM 9-2320-422-10).

Open

pump house controls access panel (WP 0008).

While an assistant puts and holds

pump operator’s panel FOAM SYSTEM switch in ON position (WP 0004), check if foam

system shutoff valve operates to open position.

.

If foam system shutoff valve does not operate to open position, go to

Step 40.

.

Step 3.

Check if foam system shutoff valve remains in open position, when assistant releases

pump operator’s panel FOAM SYSTEM switch (WP 0004).

.

If foam system shutoff valve does not remain in open position, go to Step 31.

.

Step 4.

While an assistant puts pump operator’s panel FOAM SYSTEM switch to OFF position

(WP 0004), check if foam system shutoff valve operates to closed position.

.

If foam system shutoff valve does not operate to closed position, go to

Step 24.

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MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION