Open Receiving Hopper
The aggregate is emptied into the receiving hopper
using a typical dump truck. Before the dump truck
backs up to the receiving hopper, lower the hopper
wings (opens hopper) by pressing the bottom left button
(Down) on the joystick. (Figure 4-26)
Up
Down
Figure 4-26. Hopper
Wings Control
NOTE: DO NOT open or
close the hopper
wings while the
dump truck is in
close proximity
or hitched to the
receiving hopper.
The receiving hopper width is 10 feet
when fully extended. Use extreme caution to prevent
damage or serious injury from trafî›™c and roadside
obstacles while chip spreading.
The operator (or a ground helper) will also need to
open or close one or both of the feed gates in the
receiving hopper. (Figure 4-27) The feed gates
regulate aggregate ow on the conveyors to the spread
hopper. If using only one conveyor, close the other feed
gate completely. If you notice excessive spillage or
overowing at the spread hopper, lower the feed gates
accordingly.
Closed
Feed Gate
Open
Feed Gate
Figure 4-27. Receiving Hopper Feed Gates
Truck Hitch
The success of the entire spreading function is directly
related to the dump truck hook-up to the receiving
hopper, and care should be taken to ensure accuracy.
The truck hitch provides the means for the truck to be
held in close proximity to the receiving hopper.
Figure 4-28. Dump Truck Hitched to Receiving
Hopper
The dump truck must be compatible to prevent any
interruption of aggregate supply. In general, the
tailgate of the truck bed should be set eight (8) inches
(203.2 mm) inside the retaining rubber skirt of the
receiving hopper when the bed is raised. Frame length,
the overhang of the dump truck bed frame, and the
relationship of the rear wheels to the frame vary among
trucks. Therefore, a thorough check of each truck bed
in relation to the receiving hopper must be made prior to
starting to spread.
Single-axle trucks carry 5 - 7 tons (4500 - 6350 kg)
while tandem-axle trucks carry 11 - 14 tons (9000 -
12,700 kg). Tandem-axle haul trucks are recommended
as the increased capacity requires fewer hook-ups, less
chance of spillage, and more efî›™cient operation. On
large, tandem-axle trucks, the frame, rear wheels and
gate of the dump bed may be on the same vertical line.
Extensions to the truck bed may be necessary to ensure
a proper seal when attaching to the dump truck. Hitches
should be installed to allow a minimum of two inches
(50.8 mm) clearance between the rear truck tire and the
bumper of the chip spreader.
NOTE: Dump trucks should be in good mechanical
condition. Leaking dump trucks can
compromise the seal binder.
4
Operation
Rosco CSV Variable Width Chip Spreader 4-19
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General