There are three alternatives available to the operator
Do not use cap screws or bolts in the coupling as a
when depth is not being maintained. Also if the depth
substitute for the pins.
should vary, then the structural design criterion will also
vary. Therefore, these corrective actions should be
taken in preferred order.
1. Reduce forward travel speed until desired depth* is
Figure 1-12. Shear Coupling
V.P.I. Fluid Handling System
is an electrically instrumented system
provisioned with gauges and a liquid control to visually
indicate to the operator the performance of the fluid
It operates on an electrical balance principle that
integrates the fluid rate of flow with the stabilizer travel
Figure 1-11. Instant Depth Check
speed, fulfilling the need for more accurate control and
faster dispersion of liquid, (emulsified asphalt, water or
2. Open tailboard to release unnecessary build-up of
material in the mixing chamber.
Volumes of liquid up to 500 gallons per minute (refer to
3. Replace the tines, if they are badly worn.
recapitulation chart, Table 1-2) can be obtained and
controlled with extreme accuracy.
* Desired depth (Fig. 11) Instant check on controlled
minimizes the number of re-mix passes, advances the
depth can be made by merely looking to see if the gap
travel speeds, which also benefits the tank trucks
between the bottom of the depth control cap and the top
resulting in fewer problems that otherwise might be
of the rib reinforcing is closed.
encountered at slower travel speeds.
CAUTION: The V.P.I. fluid handling system for
A shear coupling is provided in the rotor driveline. Its
handling emulsified asphalt is designed to handle this
purpose is to provide a protection to the power unit and
liquid at temperatures not to exceed 1500F and for
rotor two speed transmission that in the event the rotor
strikes an object it cannot move or climb over, the pins
will shear or break.
Whenever a new fluid meter assembly is installed in the
V.P.I. system, the V.P.I. panel must be recalibrated
An extra set of pins are provided in the miscellaneous
with the meter. Refer to calibration instructions pages