*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 150° F. If this temperature
is exceeded, damage to the non-metallic parts may result with the entire liquid system including possible
hose failure under pressure.
Operating Description, See Paragraph 2 for
The V.P.I. instruments are mounted on the engine
Operation. The metering valve control lever when
hood, Fig. 1-9, in full view of the operator and indicates
actuated, opens and closes a metering valve by means
thru gauges the gallons per minute *(1) of liquid passing
of a hydraulic cylinder. A quadrant, scaled from 1 to 10,
through the meter; the machine travel speed in feet per
is located next to the metering valve hydraulic cylinder.
minute *(2); a proportioning gauge (3) and a manual dial
As the valve is opened, the pointer which is attached to
control for setting the number of gallons of liquid per
the rod end of the cylinder will indicate, when compared
square yard (4) required.
to the application reference chart, the number of gallons
of liquid flowing thru the metering valve.
*Multiply needle reading times ten.
Example: V.P.I. system only. Supposing the job
An application reference chart, Table 1-3 is affixed to
specifications call for five gallons of liquid per square
the right top side of the engine hood opposite the
yard for the soil to be stabilized. Turn knob on gal./sq.
operating control instruction plate and is used to initially
yd. gauge to five gallons per square yard. The job
determine the liquid and travel equivalents.