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Remove upper shell (see page 8). 2. Remove fan (see page 13). 3. Remove fuel and air line hoses from nozzle assembly. 4. Turn nozzle assembly 1/4 turn to left and pull toward motor to remove. 5. Place plastic hex-body into vise and lightly tighten. 6. Carefully remove nozzle from the nozzle adapter using 5/8" socket wrench. 7. Blow compressed air thru face of nozzle. This will free any dirt in nozzle area. 8. Inspect nozzle seal for damage. 9. Replace nozzle into nozzle adapter until nozzle seats. Tighten 1/3 turn more using 5/8" socket wrench (4.5-5.1 n-m/ 40-45 inch-pounds). 10. Attach nozzle assembly to burner strap. 11. Attach fuel and airline hoses to nozzle assembly. 12. Replace fan (see page 13). 13. Replace fan guard and upper shell. Figure 20 - Removing Air and Fuel Line Hoses, 35,000 Btu/Hr Model Figure 21 - Removing Nozzle Assembly, 35,000 Btu/Hr Model Figure 22 - Nozzle and Nozzle Adapter, 35,000 Btu/Hr Model SERVICE PROCEDURES Continued Combustion Chamber Fuel Line Hose Air Line Hose Nozzle Assembly Nozzle Assembly Burner Strap Air line Fitting Nozzle Nozzle Seal Nozzle Adapter Nozzle Face Fuel line Fitting Nozzle (50/70/100/150,000 Btu/Hr Models) 1. Remove upper shell (see page 8). 2. Remove fan (see page 13). 3. Remove fuel and air line hoses from burner head. 4. Remove spark plug wire from spark plug. 5. Remove spark plug from burner head using 13/16" open-end wrench. 6. Remove three screws using 5/16" nutdriver and remove burner head from combustion chamber. 7. Place burner head into vise and lightly tighten. 8. Carefully remove nozzle from burner head using 5/8" socket wrench (see Figure 24). 9. Blow compressed air thru face of nozzle. This will free any dirt in nozzle area. Figure 23 - Removing Burner Head, 50/ 70/100/150,000 Btu/Hr Models Figure 24 - Removing Nozzle, 50/70/100/ 150,000 Btu/Hr Models Spark Plug Combustion Chamber Burner Head Air Line Hose Fuel Line Hose Screw Spark Plug Wire Nozzle Face Nozzle Burner Head Air line Fitting Fuel line Fitting Nozzle Seal 10. Inspect nozzle seal for damage. 11. Replace nozzle into burner head and tighten firmly (9.1-12.4 n-m/80-110 inch-pounds). 12. Attach burner head to combustion chamber. 13. Install spark plug in burner head. 14. Attach spark plug wire to spark plug. 15. Attach fuel and airline hoses to burner head. 16. Replace fan (see page 13). 17. Replace fan guard and upper shell. Continued 12 104976 PORTABLE FORCED AIR HEATERS Pump Rotor (Procedure if Rotor is Binding) 1. Remove upper shell (see page 8). 2. Remove filter end cover screws using 5/16" nut-driver. 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. 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 27). Note: Rotate rotor one full turn to insure 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. 12. Adjust pump pressure (see page 10). Note: If rotor is still binding, proceed as follows. 13. Perform steps 1 through 6 above. 14. Place fine grade sandpaper (600 grit) on flat surface. Sand rotor lightly in “figure 8” motion four times (see Figure 28). 15. Reinstall insert and rotor. 16. Perform steps 10 through 12 above. Figure 25 - Rotor Location, 35/50/70,000 Btu/Hr Models Figure 26 - Rotor Location, 100/150,000 Btu/Hr Models Insert Blade Rotor Pump Plate Air Intake Filter Air Output Filter Pump Plate Insert Rotor Blade Filter End Cover Air Intake Filter Air Output Filter Fan Guard Fan Guard Filter End Cover Sandpaper Gap Adjusting Screw Gap Adjusting Screw Blade .076/.101 mm (.003"/.004") Gap Measured With Feeler Gauge Rotor Figure 28 - Sanding Rotor Figure 27 - Gap Adjusting Screw Locations SERVICE PROCEDURES Continued OWNER’S MANUAL SERVICE PROCEDURES Continued Fan IMPORTANT: Remove fan from motor shaft before removing motor from heater. The weight of the motor resting on the fan could damage the fan pitch. 1. Remove upper shell (see page 8). 2. Use 1/8" allen wrench to loosen setscrew which holds fan to motor shaft. 3. Slip fan off motor shaft. 4. Clean fan using a soft cloth moistened with kerosene or solvent. 5. Dry fan thoroughly. 6. Replace fan on motor shaft. Place fan hub flush with end of motor shaft (see Figure 30). 7. Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds/ 4.5-5.6 n-m). 8. Replace fan guard and upper shell. Motor Shaft Setscrew Fan Figure 29 - Fan, Motor Shaft, and Setscrew Location SPECIFICATIONS Output Rating (Btu/Hr) 35,000 50,000 70,000 100,000 150,000 Fuel Use Only Kerosene or No. 1 Fuel Oil Fuel Tank Capacity (U.S. Gal./Liters) 3.0/11.4 5.0/18.9 5.0/18.9 9.0/34 13.5/51.1 Fuel Consumption (Gal. Per Hr./ Liters Per Hr.) .26/1.0 .37/1.40 .49/1.85 .70/2...

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