Pump Rotor - Master B35CED Owner's Manual

SERVICE PROCEDURES
12
SERVICE PROCEDURES
Continued
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.

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 ro-
tor lightly in "figure 8" motion four times (see Figure 28).
15. Reinstall insert and rotor.
16. Perform steps 10 through 12 above.
Blade
Rotor
Insert
Air Output
Filter
Figure 25 - Rotor Location, 35/70,000 Btu/Hr Models
Air Intake
Pump
Filter
Plate
Filter End
Cover
Fan Guard
Blade
Rotor
Insert
Air Output
Filter
Figure 26 - Rotor Location, 100/150,000 Btu/Hr Models
Gap Adjusting Screw
Figure 27 - Gap Adjusting Screw Locations
Sandpaper
Figure 28 - Sanding Rotor
Pump
Plate
Air Intake Filter End
Filter Cover
Fan Guard
Gap Adjusting Screw
.076/.101 mm
(.003"/.004")
Gap Measured
With Feeler
Gauge
Rotor
Blade
4110.607