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 897 of 1318
TM 9-2320-328-13&P-1
0080-3
DRAFT
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HWT1053
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
•
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.
•
Do not operate WATER TANK DRAIN switch with blue air line connected to water tank
drain valve.
If water tank drain opens inadvertently, water will discharge uncontrollably.
•
Air pressure is checked by disconnecting air lines at water tank drain valve and observing
air pressure escaping from air line, when water tank drain control valve is activated.
Air
will escape from blue air line when WATER TANK DRAIN switch is put to OPEN position,
and escape from red air line when WATER TANK DRAIN switch is put to CLOSED
position.
System air pressure may drop below 85 psi (586 kPa) during this procedure.
Step 3.
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).
Disconnect air lines at water tank drain valve.
While an assistant
puts pump operator’s panel WATER TANK DRAIN switch to OPEN and CLOSED
positions (WP 0004), check if air pressure is present at water tank drain valve blue and
red air lines.
If there is air pressure, replace water tank drain valve (WP 0172).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
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