If it is necessary to disconnect the hoses when the water temperature is
above 100 degrees Fahrenheit, exercise extreme care to prevent scalding.
PROCEDURES AFTER A MISSION
After a mission, clean and store the M12A1 PDDA. If the equipment has been used to pump slurry,
chemicals, or detergents, flush all plumbing with water to prevent hardening of liquids or sticking
valves. Inspect the apparatus for cracked, bent, or broken parts, loose or missing nuts or bolts, or other
damage. Inspect for leaks, overheating, and faulty operation.
After a decontaminating mission, decontaminate the protective clothing,
masks, and the M12A1 PDDA used by the operating personnel.
Decontaminate before removing the clothing and before handling the
In temperatures below 0 degrees Centigrade (32 degrees Fahrenheit), drain
all water from the apparatus. Any water left in the equipment will freeze
at a temperature of only a few degrees below 0 degrees Centigrade, and
may crack the pump housing, piping, and discharge hoses.
Cleaning the M12A1 PDDA
Clean the M12A1 PDDA immediately if it will not be started again within 24 hours after spraying
slurry. Otherwise the hardened slurry will make cleaning more difficult and may damage the apparatus.
Place the M12A1 PDDA in position to draw water through the suction hose. Plush the M12A1 PDDA
with water, and drain the tank unit assembly, pump unit assembly, and piping.
Flushing the M12A1 PDDA. After .a spraying mission in which slurry or other chemicals ware used,
immediately flush the M12A1 PDDA using the following steps:
Step 1. Start the pump unit as described in Lesson 2, Learning Event 1.