*These values may vary slightly due to extraneous factors, as bulker supply, line size, grade of asphalt and
temperature, and viscosity of the asphalt.
**WARNING: Under no circumstances should the liquid being pumped exceed 150F. If this temperature
is exceeded, damage to the non-metallic parts may result with the entire liquid system including possible
hose failure under pressure.
The V.P.I. instruments are mounted on the engine
Operating Description, See Paragraph 2 for
hood, Fig. 1-9, in full view of the operator and indicates
Operation. The metering valve control lever when
thru gauges the gallons per minute *(1) of liquid passing
actuated, opens and closes a metering valve by means
through the meter; the machine travel speed in feet per
of a hydraulic cylinder. A quadrant, scaled from 1 to 10,
minute *(2); a proportioning gauge (3) and a manual dial
is located next to the metering valve hydraulic cylinder.
control for setting the number of gallons of liquid per
As the valve is opened, the pointer which is attached to
square yard (4) required.
the rod end of the cylinder will indicate, when compared
to the application reference chart, the number of gallons
*Multiply needle reading times ten.
of liquid flowing thru the metering valve.
An application reference chart, Table 1-3 is affixed to
Example: V.P.I. system only. Supposing the job
the right top side of the engine hood opposite the
specifications call for five gallons of liquid per square
operating control instruction plate and is used to initially
yard for the soil to be stabilized. Turn knob on gal./sq.
determine the liquid and travel equivalents.
yd. gauge to five gallons per square yard. The job