solenoid valves, which supply fuel to the right and left
side burners, respectively. There is a screed burner fuel
shutoff valve connected to the right burner solenoid
valve. This valve allows the operator to shut off fuel to
the burners in the event of a solenoid valve failure.
Extension Screeds. The two extension screeds
increase the width of the paving operation. Hydraulic
screed extension cylinders connect the main screed and
hydraulically move in and out on the extension guide
shafts to any desired width up to 14 ft (4, 3 m). Each
extension has a burner/blower pair and a vibrator.
Telescoping extension steps mounted on the extension
screeds extend and retract with the extension screeds.
The extension screeds can be controlled at either the
operator control console or by the screed crew control
boxes. The control console controls both extension
screeds, but the left control box can control only the left
extension screed and the right control box can control
only the right extension screed.
Fuel Washdown System. The fuel washdown
system consists of a screed fuel pump switch and a fuel
spray wand assembly. This system is used to spray
diesel fuel on components that are directly exposed to
paving material during operation to allow the removal of
built up and hardened paving material. The spray wand
assembly is coiled and stored on a hanger mounted to
the right handrail of the operator platform. When in use,
the spray wand assembly hose connects to the left
burner solenoid valve using a quick disconnect coupling.
The fuel washdown system is controlled by turning on
the screed fuel pump switch located on the left screed
control panel. The spray wand assembly has a 10 ft
hose and a wand, which consists of the body, trigger,
and spray tip. The wand is activated by squeezing the
trigger when the screed fuel pump switch is turned on.