Screed Burner Fuel System. The
screed burner fuel system consists of fuel tank, fuel filter,
manifolds, four solenoid valves, and four screed burners.
The fuel filter has one input and one output. The filter
removes impurities from the fuel supply by passing the
fuel through a filter. From the filter, the fuel is sent to a
fuel pump assembly.
The fuel pump assembly consists of an electric motor
shaft coupled to a single stage pump. The motor is
controlled from the left screed control panel. The pump
has a continuous output of 7 gph (26 V/hr).
From the fuel pump, fuel is supplied to a manifold
through a manual shutoff valve.
The right hand manifold is a divider with one input and
three outputs. One output is the input to the left hand
manifold. The remaining two outputs are to the screed
burners on the right side of the screed. The left hand
manifold has one output used
by the spray wand assembly and two outputs for the
screed burners on the left side of the screed.
Electrical solenoid valves control the flow of fuel from the
manifolds to the burners. These valves are controlled by
separate switches on the screed control panels. This
allows for independent burner operation.
1.15.3. Washdown Spray Assembly Fuel System.
The washdown spray assembly fuel system consists of
fuel tank, fuel filter, fuel pump assembly, manual shutoff
valve, two manifolds, four solenoid valves, and spray
wand assembly. The fuel pump that draws fuel to the
screed burners also provides fuel for the spray
The spray wand assembly consists of a 10 ft (3 m) quick
disconnect hose, fitting, and a triggertype control wand.
The spray wand assembly is primarily used to spray fuel
on components that are directly exposed to paving
material. This prevents paving material from sticking,
and allows the material to be removed from machine
components by scraping or other mechanical means.