LESSON 2
DESCRIBE PROCEDURES FOR STARTING, OPERATING, AND STOPPING
THE M12A1 PDDA ENGINE AND PUMP UNIT
TASK
Describe procedures for starting, operating, and stopping the M12A1 PDDA engine and pump unit.
CONDITIONS
Given information about and illustrations of the procedures for starting, operating, and stopping the
M12A1 PDDA under normal and unusual conditions.
STANDARDS
Demonstrate competency of the task skills and knowledge by responding to the multiple-choice
examination covering the procedures for starting, operating, and stopping the M12A1 PDDA under
normal and unusual conditions.
REFERENCE
TM 3-4230-209-10
Learning Event 1
START THE M12A1 PDDA ENGINE AND PUMP UNIT
As a decontamination specialist, you must be able to start the engine of the M12A1 PDDA pump unit
assembly safely and without damage to the apparatus. To do so, you must be familiar with the
components and controls described in Lesson 1 and know the correct sequence of steps to perform to
start the engine and pump unit.
BEFORE-OPERATION SERVICES
As with any other item of mechanical equipment, certain procedures must be performed on the M12A1
PDDA before operation. These procedures begin with a visual inspection.
Visual Inspection
Remove the canvas cover and cover panels from the pump unit. Remove the cover panels from the M2
water heater. Inspect for loose or missing nuts or bolts. Tighten or replace them as necessary. Inspect
the M12A1 PDDA to see that all parts are present. See that wiring or other objects do not obstruct
moving parts. See that applicable manuals are present and in serviceable condition. See that entries in
the equipment logbook are up-to-date. See that the pipe caps are on the two discharge hoses and the
suction hose connector, and that chain assemblies are in place. See
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