Desa B50G, REM50B owner manual Nozzle, Pump Rotor

13.Replace burner strap onto combus- tion chamber.

14.Attach spark plug wire to spark plug.

15.Attach fuel and air line hoses to nozzle assembly.

16.Replace fan (see page 9).

17.Replace fan guard and upper shell.

Nozzle

1.Remove upper shell (see page 9).

2.Remove fan (see page 9).

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 through 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 (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 9).

13.Replace fan guard and upper shell.

Pump Rotor

(Procedure if rotor is binding)

1.Remove upper shell (see page 9).

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 17, page 12).

Note: Rotate rotor one full turn to insure the gap is .003"/.004" at tightest position. Adjust if needed.

45°	Burner
	Strap

Figure 12 - Spark Plug Rotation

Combustion

Chamber

Nozzle

Assembly

Nozzle	Burner
	Strap
Assembly

Air Line Hose	Fuel Line Hose
Figure 13 - Removing Air and Fuel		Figure 14 - Removing Nozzle Assembly

Line Hoses
Nozzle	Nozzle
Face
	Seal

Nozzle

Nozzle

Adapter

Air Line	Fuel Line
	Fitting
Fitting

Figure 15 - Nozzle and Nozzle Adapter

Blade

Pump	Air Intake
	Filter
Plate	Filter End
	Cover

Fan Guard

Insert Rotor

50 ROTOR	PFA/P 056
	Air Output
	Filter

Figure 16 - Rotor Location

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