Pump Rotor - Desa 200,000 Btu/Hr Owner's Manual

SERVICE
PROCEDURES
Continued

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
.003"/.004" if needed (see Figure 18).
Note: Rotate rotor one full turn to in-
sure the gap is .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 9).
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 Fig-
ure 19).
15. Reinstall insert and rotor.
16. Perform steps 10 through 12 above.
104473
Nozzle
Face
Nozzle
Burner
Head
Figure 16 - Removing Nozzle
Insert
Rotor
Air Output Filter
Figure 17 - Rotor Location
Gap Adjusting Screw
Blade
Figure 18 - Gap Adjusting Screw Locations
Figure 19 - Sanding Rotor
11
OWNER'S MANUAL
Nozzle Seal
Air Line
Fitting
Pump Plate
Blade
.003"/.004" Gap
Measured With
Feeler Gauge
Rotor
Gap Adjusting Screw
Sandpaper
Fuel Line
Fitting
Air Intake Filter
Fan Guard
Filter End Cover