Loading Water From A Natural Water Source

Operation of the M12A1 PDDA
Page Navigation
56

Water can be loaded from a hydrant or a tank truck by first removing the circular cover on the hopper-

blender then inserting a hose (not part of the M12A1 PDDA) in the hopper-blender assembly. Fill the

tank.

An alternate method of filling the hopper-blender from a pressure source is to use the suction hose

provided with the PDDA. First, attach one end of the suction hose to the tank drain valve. Then using a

suitable adaptor (not part of the PDDA), connect the opposite end of the suction hose to the pressure

source. Open the tank drain valve and monitor the filling progress on the tank liquid level indicator

because it can be very rapid.

LOADING WATER FROM A NATURAL WATER SOURCE

If the height from the natural water source to the pump does not exceed 15 feet, water can be loaded

from a stream, pond, or other natural source by using the suction hose and foot valve assembly. To do

so, use the following steps.

Step 1. See that valves 1, 2, 3, 4, and the pump

drain valve are closed (Figure 27). Be sure the

two discharge and one suction connectors on the

pump unit are capped. Remove the tank lid

from the prime-detergent tank. Fill the prime-

detergent tank with water and replace the tank

lid.

Step 2. Open valve 4 to allow water from the

prime-detergent tank to fill the pump cavity.

Open the pump drain valve briefly and allow

some water to run out. Then close the pump

drain valve. Remove the cover panels marked

Figure 27. Valve positions before filling tank

REMOVE BEFORE OPERATING on the pump

unit.

Step 3. Remove the exhaust pipe extensions and suction hose from the top of the tank unit. Straighten

out the suction hose. Remove the blender hose from inside the suction hose. Remove the protective cap

from the upper discharge connector. Connect the blender hose to the upper discharge hose connector.

Connect the other end of the blender hose to the agitator connector on the tank unit.

Step 4. Remove the protective cap from the suction hose quick-disconnect coupling half on the

connector panel. Connect one of the two quick-disconnect coupling half ends of the suction hose to the

suction hose quick-disconnect coupling half on the connector panel.

Step 5. Remove the foot valve assembly from its bracket on the tank unit. Connect the other quick-

disconnect coupling half end of the suction hose to the foot valve. Submerge an empty STB

decontaminating