Section III. TECHNICAL PRINCIPLES OF OPERATION
Functional Description . . . . . . . . . . . . . . . . . . .
DieseI-Driven Centrifugal Pump . . . . . . . . . . . 1-11
This section contains essential information which a maintenance technician must know to do the overall job proper-
ly. Description of components and assemblies which are not maintained at unit maintenance are included when
necessary to provide continuity.
1-11. DIESEL-DRIVEN CENTRIFUGAL PUMP
This is a self-contained, transportable, diesel driven centrifugal pump for pumping water. Consists of a self-priming
centrifugal pump, a four-stroke, air-cooled diesel engine, and sound enclosure for noise reduction.
SOUND ENCLOSURE ASSEMBLY. Aluminum enclosures, riveted, urethane polyester acoustical
foam with adhesive backing as noise reducing material, secured to frame with screws. Aluminum
enclosures are painted with Chemical Agent Resistant Coating (CARC).
CENTRIFUGAL PUMP. Aluminum casing with bronze impeller, integral check valve, 3/8 inch drain
port. Counterclockwise rotation, 2 inch suction and discharge connections.
FRAME Aluminum, all-welded construction. Chemical Agent Resistant Coating (CARC).
DIESEL ENGINE. Four-stroke, vertical cylinder, air-cooled diesel, recoil starter, forced lubrication
by trochoid pump. Direct fuel injection system, dry-type air cleaner with air cleaner restriction indi-
cator. 3.8 horsepower (continuous) at 3600 RPM.
1-12. DIFFERENCE IN MODELS
Fuel pump requires grounding application. (refer to pargraph 2-8 for use)
CAM-Lock Couplings (2 inch) required on fuel pump suction and discharge ports
Fuel pump requires the use of a spark arrestor muffler with 6 baffles.
National Stock Numbers (NSNS)
For Water (Army) NSN 4320-01-247-7127
For Fuel (Marine Corps) NSN 4320-01-313-9442
1-10. FUNCTIONAL DESCRIPTION