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2. Remove side cover. 3. Pull upper fuel line off fuel filter neck. 4. Carefully pry bushing and fuel filter out of fuel tank. 5. Wash fuel filter with clean fuel and replace in tank. 6. Attach upper fuel line to fuel filter neck. 7. Replace side cover (see Figure 9). Fuel Filter Side Cover Upper Fuel Line Figure 9 - Fuel Filter Removal IGNITOR (RJ45) 1. Remove upper shell and fan guard (see Upper Shell Removal, page 8). 2. Remove fan (see Fan, page 8). 3. Remove side cover screws with a 5/16" nut driver. Remove side cover (see Figure 9). 4. Disconnect ignitor wires from ignition control assembly (see Figure 10). Pull the ignitor wires up through the hole in the lower shell. 5. Disconnect fuel line hose and air line hose. Remove photocell from photocell bracket (see Figure 10). 6. Remove combustion chamber. Stand combustion chamber on end with nozzle adapter bracket on top (see Figure 11). 7. Remove ignitor screw with a 1/4" nut driver. Carefully remove ignitor from nozzle adapter bracket. CAUTION: Do not bend or strike ignitor element. Handle with care. 8. Carefully remove replacement ignitor from styrofoam packing. 9. Carefully guide ignitor into opening in nozzle adapter bracket. Do not strike ignitor element. Attach ignitor to nozzle adapter bracket with screw using a 1/4" nut driver (see Figure 11). Torque 1800 to 3500 grams/centimeters. Do not over torque. 10. Replace combustion chamber. 11. Route the ignitor wires back down through the hole in the lower shell. Connect wires to the ignition control assembly. See Wiring Diagrams, page 12, for correct terminal locations. 12. Replace side cover (see Figure 9). 13. Connect and route fuel line hose and air line hose to nozzle assembly. See Fuel and Air Line Replacement and Proper Routing, page 10. 14. Replace photocell in photocell bracket. Route wires between hoses and back down through the hole in the lower shell with ignitor wires (see Figure 10). 15. Replace fan (see Fan, page 8). 16. Replace fan guard and upper shell (see Upper Shell Removal, page 8). Combustion Nozzle Chamber Ignitor Wires (Gray) Ignitor Adapter Bracket Ignition Control Assembly Side Cover Photocell Bracket Photocell Assembly Air Line Hose Fuel Line Hose Figure 10 - Disconnecting Ignitor Wires from Ignition Control Assembly Ignitor Screw Figure 11 - Ignitor Replacement Combustion Chamber Photocell Bracket Ignitor Nozzle Adapter Bracket Nozzle Adapter Bracket Opening Ignitor Element Continued 104950 9 RJ45 And RJ70 PORTABLE FORCED AIR HEATERS SERVICE PROCEDURES Continued SPARK PLUG (RJ70) 1. Remove upper shell (see Upper Shell Removal, page 8). 2. Remove fan (see Fan, page 8). 3. Remove spark plug wire from spark plug. 4. Remove spark plug from burner head using 13/16" open-end wrench. 5. Clean and regap spark plug electrodes to 2.2 mm. 6. Install spark plug in burner head. 7. Attach spark plug wire to spark plug. 8. Replace fan (see Fan, page 8). 9. Replace fan guard and upper shell (see Upper Shell Removal, page 8). Burner Spark Plug Wire Head Spark Plug Figure 12 - Spark Plug Removal Bend Here to Adjust Gap Gap 2.2 mm Figure 13 - Spark Plug Gap NOZZLE (RJ45) 1. Remove upper shell (see Upper Shell Removal, page 8). 2. Remove fan (see Fan, page 8). 3. Remove fuel and air line hoses from nozzle adapter. 4. Turn nozzle adapter 1/4 turn to left and pull toward motor to remove. 5. Place nozzle adapter into vise and lightly tighten. 6. Carefully unscrew nozzle from the nozzle adapter using 5/8" socket wrench. 7. Blow compressed air through face of nozzle. This will free any dirt in nozzle area. 8. Inspect nozzle seal for damage. 9. Screw nozzle into nozzle adapter until nozzle seats. Tighten 7200-8000 grams/ centimeter using 5/8" socket wrench. 10. Install nozzle adapter into nozzle adapter bracket. 11. Connect and route fuel line hose and air line hose to nozzle assembly. See Fuel and Air Line Replacement and Proper Routing, page 10. 12. Replace fan (see Fan, page 8). 13. Replace fan guard and upper shell (see Upper Shell Removal, page 8). Combustion Fuel Line Hose Chamber Nozzle Adapter Air Line Hose Ignitor and Photocell wires through this hole Figure 14 - Removing Air and Fuel Line Hoses Nozzle Adaptor Bracket Nozzle Adapter Combustion Chamber Figure 15 - Removing Nozzle Assembly Nozzle Face Nozzle Nozzle Adapter Air Line Fitting Fuel Line Fitting Nozzle Seal FUEL AND AIR LINE REPLACEMENT AND PROPER ROUTING 1. Remove upper shell (see Upper Shell Removal, page 8). 2. Remove side cover screws using 5/16" nut driver (see Figure 9, page 9). 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 or burner head (see Figure 14 or Figure 18, page 11) and from fuel filter (see Fuel Filter, page 9). If air line hose is damaged, disconnect from nozzle adapter or burner head (see Figure 14 or Figure 18, page 11) and from barb fitting on pump end cover (see Figure 17). 5. Install new air and/or fuel line. Attac...
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