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 862 of 1318

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

0076-24

DRAFT

0076

HWT1173

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 tank-to-pump valve and observing air

pressure escaping from air line, when tank-to-pump control valve is activated.

Air will

escape from blue air line when TANK TO PUMP switch is put to open position, and escape

from red air line when TANK TO PUMP switch is put to closed position.

System air

pressure may drop below 85 psi (586 kPa) during this procedure.

Step 35.

Disconnect air lines at tank-to-pump valve.

While an assistant puts cab or pump

operator’s panel TANK TO PUMP switch to open and close positions (WP 0004), check

if air pressure is present at tank-to-pump valve.

a.

If there is air pressure, replace tank-to-pump valve (WP 0322).

b.

If there is no air pressure, replace tank-to-pump control

valve (WP 0271).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION