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 870 of 1318

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

0077-4

DRAFT

0077

HWT0633

WARNING

ICON 26,66

•

Be sure to wear proper eye protection to prevent injury or death.

If air lines are

under pressure when they are disconnected, they can whip around and cause

injury to personnel.

Caution should be exercised when disconnecting air line

fittings.

•

Be sure to wear proper eye protection to prevent injury or death.

Air lines may be

under pressure when control valve is operated.

If under pressure and air lines are

disconnected, air lines may whip around and cause injury to personnel.

Caution

should be exercised when operating control valve with air lines disconnected.

NOTE

Air pressure is checked by disconnecting air lines at under truck nozzles valve and

observing air pressure escaping from air lines, when under truck nozzles control valve is

activated.

Air will escape from blue air line when UNDER TRUCK NOZZLES switch is put

to on position, and escape from red air line when UNDER TRUCK NOZZLES switch is put

to off position.

System air pressure may drop below 85 psi (586 kPa) during this

procedure.

Step 6.

Put UNDER TRUCK NOZZLES switch to off position (WP 0004).

Put FOAM SYSTEM

switch to off position (WP 0004).

Disconnect air lines at under truck nozzles valve.

While an assistant puts UNDER TRUCK NOZZLES switch to on and off position

(WP 0004), check if air pressure is present at under truck nozzles valve.

If air pressure is present, replace under truck nozzles valve (WP 0323).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION