19. (ARMY) FLATBED CARGO TRAILER AND FRAME. The flatbed cargo trailer and frame is designed to
provide a mobile platform for the 600 GPH Water Purification Unit. The unit is capable of being transported by
road, rail, or air including helicopter. The trailer, when being transported by road, is towed by a towing vehicle
through a lunette/pintle hookup. The trailer has four leveling jacks with swivels, one on each com ner, and is
equipped with a spare wheel and tire carrier. The trailer incorporates service brakes which are air-actuated and
operated from the towing vehicle through an integral set of hoses. The trailer brake system also includes
emergency and automatic parking brake functions that are activated when the air hoses are disconnected from
the towing vehicle. An air tank is installed for the purpose of reserving air for this system when the trailer is
disconnected from the towing vehicle. A 24-volt electrical system consisting of one composite blackoutstoplight
assembly, and two stoplighttail light assemblies is installed on the trailer. Power is supplied through a cable
connected to the electrical system of the towing vehicle. The trailer suspension consists of two axles in tandem,
supported on leaf springs attached to an axle trunnion. The all-steel frame has one vertical parachute
attachment/sling lifting eye on each corner, and one horizontal air-drop platform/transport tie-down on each
corner; as well as having four (4) air-drop platform tie-down rings attached to each of the two main beams
exposed on the trailers underside. The frame houses the 600 GPH Water Purification Unit and and is capable of
being separated from the trailer and transported or air lifted as an independent unit.
Figures 15 and 1-6 show the location of the trailers major components. The front view shows the location of the
adjustable Lunette, lubrication plate, the safety step, air brake hoses, electrical cable, a front view of the frame, the
front leveling jack, swivel assembly, the vehicle identification plate, and the safety chain assembly. The rear view
shows the location of the stoplight-tail light assemblies, the blackout stoplight assemblies, spare tire carrier, a
rear view of the frame, suspension assembly, wheel assembly, air brake assembly, and rear leveling jack.
The USMC ROWPU is skid mounted but the frame is the same as shown in figures 15 and 1-6.
1-10. OUTLYING PUMPS.
a. General. The ROWPU has four pumps (figure 17). These pumps are mounted On welded frames that
protect them during transportation on the ROWPU. The frames also serve as operating bases for the pumps and
provide storage space for the power cables.
b. Raw Water Pumps. Each ROWPU has two identical raw water pumps. These pumps remove raw water
from a source and supply it to the ROWPU.
c. Backwash Pump. The backwash pump is used to pump water from the brine water tank upwards through
the multimedia fitter. This process flushes out the particles that collect in the multimedia filter during normal
d. Distribution Pump. The distribution pump delivers drinkable water from the product water storage tanks to