Section E. FUEL SYSTEM
The fuel system consists of a two stage fuel pump which is operated by the blower motor. Fuel lines from the dual
fuel oil strainers allow oil to pass to the suction side of the fuel pump At this time the fuel passes through and is raised
in pressure by the fuel pump. Fuel lines allow the fuel to flow from the fuel pump to the burner oil valves. From the
oil valves the fuel passes on into the internal assembly and is passed on through the fuel nozzle or returned to the
fuel system. The fuel pump must have a return and supply fuel line attached to a fuel supply for operation. Selector
fuel oil manual valves are mounted near the dual fuel oil strainers for optional use of either strainer.
63. Fuel Pump
a. Removal and Disassembly. Refer to Fig. 48 and remove the fuel pump.
1. To remove fuel pump from burner, disconnect all piping from fuel pump. Remove 2 bolts from fuel pump
mounting. Remove screws from burner cover plate. Reach inside burner housing and loosen set screws in
pump coupling. Remove pump by pulling away from burner housing.
2. Refer to Fig. 49 and disassemble the fuel pump.
b. Cleaning, Inspection and Repair.
1. Clean all parts with the exception of the antihum wafer (sound cushion), in an approved cleaning solvent and dry
2. Discard the antihum wafer.
3. Inspect the mounting hardware for cracks, breaks, signs of wear, damaged threads, and fittings.
4. Replace a defective part. Install a new antihum wafer.
c. Reassembly. Refer to Fig. 49 and reassemble the fuel pump.
d. Installation. To install the fuel pump, mount in reverse order of removal.
e. Adjustment. Refer to Para. 64 and Fig. 50 and adjust the fuel pump.