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16. Replace fan guard and upper shell (see page 10). Hose Combustion Photocell Assembly Ignitor Nozzle Adapter Bracket Ignition Control Assembly Side Cover Chamber Air Line Hose Fuel Line Ignitor Wire Photocell Bracket Figure 21 - Disconnecting Ignitor Wires from Ignition Control Assembly Ignitor Screw/ Photocell Bracket Ignitor Washer Assembly Nozzle Adapter Bracket Ignitor Element Combustion Chamber Nozzle Adapter Bracket Opening Figure 22 - Ignitor Replacement Fuel Line HoseAir Line Hose Nozzle/ Adapter Assembly Combustion Chamber Photocell Bracket Nozzle Adapter Bracket Figure 23 - Removing Air and Fuel Line Hoses (40/55/70 Models Only) 116170-01A SERVICE PROCEDURES Continued ChamberCombustion Nozzle Adapter Bracket Photocell Bracket Nozzle/ Adapter Air Line Assembly Hose Fuel Line Hose Figure 24 - Removing Air and Fuel Line Hoses (115/165 Models Only) NOZZLE ASSEMBLY 1. Remove upper shell (see Upper Shell Removal, page 10). 2. Remove fan (see Fan, page 10). 3. Remove fuel and air line hoses from nozzle assembly (see Figure 23, page 12 or Figure 24). 4. Turn nozzle assembly 1/4 turn to left and pull toward motor to remove (see Figure 25). 5. Place plastic hex-body into vise and lightly tighten. 6. Carefullyremovenozzlefromthenozzleadapter using 5/8" socket wrench (see Figure 26). 7. Blow compressed air through face of nozzle. This will free any dirt in nozzle area. 8. Inspect nozzle sleeve for damage. 9. Replace nozzle into nozzle adapter until nozzle seats. Tighten 1/3 turn more using 5/8" socket wrench 4.5 to 5.1 N-m (40 to 45 in-lbs). See Figure 26. 10. Attach nozzle assembly to burner strap (see Figure 25). 11. Attach fuel and airline hoses to nozzle assembly. See Fuel and Air Line Replacement and Proper Routing, page 14. 12. Replace fan (see Fan, page 10). 13. Replace fan guard and upper shell (see Upper Shell Removal, page 10). Combustion Chamber Assembly Nozzle/ Adapter Figure 25 - Removing Nozzle/Adapter Assembly Nozzle Face Nozzle Nozzle Sleeve Nozzle Adapter Air Line Fitting Fuel Line Fitting Figure 26 - Nozzle and Nozzle Adapter 116170-01A SERVICE PROCEDURES PUMP ROTOR Continued (Procedure if Rotor is Binding) FUEL AND AIR LINE REPLACEMENT AND PROPER ROUTING 1. Remove upper shell (see Upper Shell Removal, page 10). 2. Remove side cover screws using 5/16" nut driver (see Figure 19 or 20, page 11). 3. Remove side cover. 4. Inspect fuel and air line hoses for cracks and/or holes. If fuel line hose is damaged, disconnect from nozzle adapter (see Figure 23 or 24) and from fuel filter (see Fuel Filter, page 11). If air line hose is damaged, disconnect from nozzle adapter (see Figure 23, page 12 or Figure 24, page 13) and from barb fitting on pump end cover (see Figure 27). 5. Install new air and/or fuel line. Attach one end of air line hose to barb fitting on pump end cover (see Figure 27) and the other end to nozzle adapter (see Figure 23, page 12 or Figure 24, page 13). Attach one end of fuel line hose to fuel filter (see Fuel Filter, page 11) and the other end to nozzle adapter (see Figure 23, page 12 or Figure 24, page 13). Note: Route hoses as shown in Figure 23, page 12 or Figure 24, page 13, according to model. Hoses are not to touch photocell bracket. 6. Replace side cover. 7. Replace upper shell and fan guard (see Upper Shell Removal, page 10). Pump End Cover Barb Fitting Air Hose Barb Fitting 40/55/70 Models 115/165 Models Figure 27 - Air Hose to Barb Fitting 1. Remove upper shell (see Upper Shell Removal, page 10). 2. Remove filter end cover screws using 5/16" nut driver (see Figure 28 or 29). 3. Remove filter end cover and air filters. 4. Remove pump plate screws using 5/16" nut-driver. 5. Remove pump plate. 6. Remove rotor, insert, and blades (see Figure 28 or 29). 7. Check for debris in pump. If debris is found, blow out with compressed air. 8. Install insert and rotor. 9. Check gap on rotor. Adjust to .076/.101 mm (.003"/.004") if needed (see Figure 30, page 15). Note: Rotate rotor one full turn to ensure the gap is .076/.101 mm (.003"/.004") at tightest position. Adjust if needed. 10. Install blades, pump plate, air filters, and filter end cover. 11. Replace fan guard and upper shell (see Upper Shell Removal, page 10). 12. Adjust pump pressure (see Pump Pressure Adjustment, page 11). Pump Plate Insert Rotor Blade Filter End Cover Air Intake Filter Air Output Filter Figure 29 - Rotor Location, 115/165 Models Insert Blade Rotor Pump Plate Air Intake Filter Air Output Filter Filter End Cover Figure 28 - Rotor Location, 40/55/70 Models 116170-01A SERVICE PROCEDURES Continued Note: If rotor is still binding, proceed as follows. 13. Perform steps 1 through 6. 14. Place fine grade sandpaper (600 grit) on flat surface. Sand rotor lightly in “figure 8” motion four times (see Figure 31). 15. Reinstall insert and rotor. 16. Perform steps 10 through 12. Gap Adjusting Screw .003"/.004" (.076-.101 mm) Gap Measured With Feeler Gauge Gap Adjusting ...

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