Chip Sealing
Become familiar with the machine’s response to the
joystick and how the components function as discussed
in the previous pages. Ground speed is proportional to
the joystick movement.
You will primarily use the joystick controls while
spreading, pressing the chipping activation button on
the back of the joystick when approaching the asphalt
binder. (Page 3-10) The gates will close automatically
when the joystick is brought into the neutral position.
Remember these operational tips:
• Adjust the truck hitch BEFORE connecting to the
haul truck. SLOWLY ease the machine forward to
ensure the truck hitch is properly connected. If the
connection is secure, the truck will be pulled along
while spreading. The truck can be released at any
time.
• Check the aggregate level in the receiving hopper
regularly and signal the haul truck driver to raise or
lower the truck bed as needed. Always raise the truck
bed SLOWLY as you watch the aggregate ow along
the conveyors into the spread hopper. Raising the
truck bed too fast can cause excess spillage.
• Always pay attention to aggregate ow and conveyor
speed. An easy method of determining whether the
conveyor speed is correct:
• If operating in the manual mode, ll the spread
hopper, then move the main gate extensions to
the desired width. As the main gates extend, the
aggregate level will lower.
• If operating conveyors in the Auto mode, they
will automatically reî›™ll the spread hopper. The
conveyors will automatically start and stop
continuously in the Auto mode.
Chip Seal Troubleshooting
The following troubleshooting guide associates some common problems to their potential causes. (In California, the
most common problem is ushing.)
Table 4-6. Causes of Chip Seal Problems
CAUSE
PROBLEM
Excessive Loss
of Aggregate
Crushing
Aggregate
Adhesion
Problems
Aggregate
Raveling
Binder
Streaking
Transverse
Patches
Flushing
Aggregate
Polishing
Poor Mat
Poor Trafî›™c Control
v v
Vehicle Speeds
v v v v v v
Cold Surface
v v v v
Wet Surface
v v v v
Windy Conditions
v v v v
Wrong Binder for Aggregate
v v v v v v
Too Little Binder
v v v v
Too Much Binder
v v v
Too Little Aggregate
v v
Too Much Aggregate
v v v v v v
Wet Aggregate
v v v v
Dirty Aggregate
v v v v
Poor Quality Aggregate
v v v v v
Wrong Size Aggregate
v v v v v
Operation
Rosco CSV Variable Width Chip Spreader4-24