1.15.2. Screed Burner Fuel System

TM 5-3895-373-20 1.15.2. Screed Burner Fuel System. The screed burner fuel system consists of fuel tank, fuel filter, fuel pump assembly, manual shutoff valve, two 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 washdown system. 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. 1-19