stock number, date of manufacture, and the government
top of a horizontal air pressure tank.
The air
registration number.
compressor has a delivery capacity of 16 cubic feet of
air per minute, and is equipped with an automatic
c. Engine Data Plate. This plate (C, fig. 3) is
pressure control which unloads the compressor through
the auxiliary unloader when the tank pressure has
mounted on the engine cylinder-head air cover. It
reached 175 psi and allows the compression to resume
shows the manufacturer's name, engine serial number,
when the pressure has dropped to 145 psi.
horsepower rating, and lubrication instructions.
The engine is a 2-cylinder, air-cooled with electric and
manual starting provisions, 4-cycle type. Two 12-volt
d. Compressor Data Plate. This plate (D, fig. 3) is
batteries, connected in series, supply cranking power to
located on the side of the compressor. It gives the
the gasoline engine, and power for the heater electric
compressor model and serial number.
fuel pump, igniter, and blower.
A hose reel bank (19) consisting of five hand-operated
e. Lifting Attachments Plate. This plate (E, fig. 3) is
reels is mounted at the rear of the lubricator together
mounted on the side of the inclosure (12, fig. 2). It gives
with necessary fittings, control valves, and meters. Four
the load capacity, and lift points for the entire unit and
hoses dispense lubricants, and one hose delivers air
also for the inclosure only.
under pressure. Accessory drawers (14, 15) directly
below the reel bank assembly contain all necessary
f. Heater Data Plate. This plate (F, fig. 3) is located
handguns, pneumatic guns, oilers, adapters, and grease
on the side of the heater and contains the make, model
fittings.
number, serial number, output capacity and voltage.
The unit is inclosed in an aluminum housing, which
provides protection under all climatic conditions.
g. Clutch Data Plate. This plate (G, fig. 3) is located
Openings with doors (1) on all four sides provide access
on top of the clutch housing and contains information on
to the installed components, and the lubricant storage
the adjustment and lubrication of the clutch assembly.
compartment.
h. Lubricant Pumps Data Plates. These plates
4. Identification Plates
located on each of the three air-operated pumps contain
the manufacturer's name and type.
a. Graco Lubricating Unit Identification Plate. This
plate (A, fig. 3) is mounted directly above the battery
i. Alcohol Dispenser Instruction Plate. This plate (H,
box on the reel end of the unit. It gives the
fig. 3) is located above the dispenser and gives
manufacturer's name, model number, and serial
abbreviated instructions for dispensing alcohol into the
number.
system.
b. Corps of Engineers Identification Plate. This plate
5. Differences in Models
(B, fig. 3) is mounted on the cover of the center toolbox
(9, fig. 2). It gives the manufacturer's name,
This manual applies only to the Gray Lubricating and
nomenclature, serial number, model number, Federal
Servicing Unit, Model 250-530, serial numbers 9510
through 9669, and 9678 through 9717.
6. Tabulated Data
a. General.
Manufacturer........................................................................................... Gray Company, Inc.
Model ..................................................................................................... 250-530
Type ....................................................................................................... Portable
Overall length ........................................................................................ 8 ft (feet)
Overall width .......................................................................................... 3 ft 10 in. (inches)
Overall height ........................................................................................ 4 ft 8 in.
Weight ................................................................................................... 2,360 lb (pounds)
b. Engine.
Manufacturer .......................................................................................... D. W. Onan and Sons, Inc.
Model number ......................................................................................... ACK-MF/515D
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