CHIP SPREADING OPERATION
The CSV Variable Width Chip Spreader is propelled
by a hydrostatic transmission with a single two-speed
motor driving the axle. Aggregate is emptied into the
receiving hopper from a typical dump truck and moved
via two conveyors to the spread hopper in the front
where individual gates are hydraulically opened. Within
the spread hopper, a spread roll rotates to provide
consistent, uniform aggregate application to the binding
material sprayed onto the paving surface. (Figure 4-25)
Figure 4-25. Chip Spreading
It is important that operators understand system
functions and controls before operating the machine for
successful results. Pay attention to the DP710 digital
display as the main screen shows the status of various
functions set on the control console. (Page 4-9)
Be sure trafc control operations are in place before
beginning the chip spreading project. As soon as the
chip spreader is in place, line up the asphalt distributor
truck in front.
Always sound the horn before moving
the chip spreader and ensure no people are in its
path. Serious injury or even death can result.
In order for the chip spreader to propel from a stationary
position, remember:
• The park brake must be disengaged.
• The joystick(s) must be in the neutral position.
• The desired operator control console must be
activated (if equipped with dual operator stations).
• You must step on the service brake and release, then
propel forward or reverse using the joystick. (If you
try to propel without stepping on the service brake, an
error code will ash on the DP 710 digital display.)
• If the machine sits idle more than 10 seconds, the
joystick will time out and you must step on the service
brake again.
NOTE: Extend both spread hopper extensions,
navigate to the Settings screen on the
DP710 digital display and perform a “hopper
dump” before lling the receiving hopper,
especially if the machine has not been used
for awhile. This clears any debris or old
aggregate from the hoppers. This is a good
habit if there are multiple operators or a
variety of aggregate used.
Avoid low limbs, power lines and other
objects that can endanger crew or chip spreader.
Checking Application Rate
Checking the aggregate application rate can be
accomplished using the following recommended
method. This method is also used for PSY
calibration:
1. Enter your target PSY rate into the DP710
digital controller. (Page 4-14)
2. Place a tarp measuring one square yard (.84
m
2
) onto the roadway and apply aggregate
onto it.
3. Weigh the tarp with the aggregate. This is your
actual PSY rate.
4. Enter the actual PSY rate into the DP710 digital
controller.
Operation
Rosco CSV Variable Width Chip Spreader4-18
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General