General Support, and Depot Maintenance Manual) gives details on installing, operating, and maintaining the
different models of the unit. A description of the various components is provided as follows:
Tanks. The tank shells have a manhole assembly, pump-port drain plug, and discharge valve assembly.
Controls for the discharge valve are on the top of the tanks. The discharge valve outlet is at the bottom rear
of the tank, and the drain plug is at the bottom front. A baffle inside the shell helps keep down the surge of
the product during transport. Two lifting rings are attached to the top of each end of the shell to make
handling easier. Tie downs are provided for securing the tanks in the vehicle bed.
Pump. The pump is a 50 GPM, self-priming, centrifugal pump. The impeller is screwed on the extension of
the engine crankshaft. The engine is a 1-cylinder, 4-cycle, air-cooled, hand cranked engine. Some models
have 2-cylinder, 4-cycle, overhead-valve, air-cooled engines. A radio-shielded magneto supplies the ignition
spark, and a governor controls the engine speed by varying the throttle openings to suit pump loads. The
gasoline tanks hold one gallon. The pump and engine are mounted on a common base so that they can be
easily removed for servicing and can be used in other pumping operations.
Filter/Separator. The filter/separator is a vertical, 50 GPM capacity unit with four standard canisters and
filter elements. The tank and pump unit can be used to refuel aircraft because the filter/separator qualify
under military specification MIL-F-8901C.
Manifold. The manifold controls the flow
to the suction side
of the pump. Two quick couplers
provide connections or inlets for the tank suction lines. The product flows from either or both tanks to the
pump suction through the manifold outlet and a section of hose. Some models have a discharge hose that
runs from the filter/separator to the manifold and product can be discharged from the manifold outlet when
the three-way valve issued to close off the suction side. Other models use the only manifold for suction.
Hose Reels. The dispensing hoses are stored on two hose reels each with a recoil tension spring. A 40-foot
length of 1 1/2-inch non-collapsible discharge hose is used on each reel. Product from the filter/separator
enters through a pipe at the hub of the reel and is discharged through the hoses.
Ground Reel. A ground reel is attached to the frame of the pumping assembly so that the tank and pump
unit can be grounded. One section of the ground wire must be clipped to a ground rod near the tank and
pump unit before the other section is connected to the vehicle being fueled.
Metering Kit. The metering kit consists
of a meter, hose assembly, couplers, cap screws, and washers. The
kit is used with pumping assemblies on all tank and pump units.
Other Items. Other items issued with the pumping assembly are a drum-unloaded suction stub for emptying
55-gallon drums, two dispensing nozzles, a starter rope, a carbon dioxide fire extinguisher, and tie down
assemblies. If the nozzles have lock-on, latch-open devices, the devices must be fixed so that they must be
held open by hand and attended at all times.
PART B - GAGING PETROLEUM TANK VEHICLES
Each tank has its own gage stick. It may be made of wood or metal depending on the type of vehicle. It is
important that you keep the stick protected from the elements whenever not in use. The gage stick is usually
graduated into 25-gallon divisions. Before gaging any type of vehicle, bond and ground the tank vehicle and
ground yourself from static electricity by touching a bare hand to the tank shell. Do not wear headgear or
loose items when you are on top of the tank vehicles. Never gage during an electric storm. Position the fire
extinguisher within 10 to 15 feet of the tank vehicle. Verify the shipping document for kind of fuel in the tank
vehicle. Insert the thermometer as soon as you open the hatch. (If quantity is less than 3,500 gallons, it is
not necessary to take the temperature). Gage the compartment. Take all-level sample. Measure the API
gravity of the sample and record it on the gage work sheet. Correct the volume to 60 degrees Fahrenheit if