Desa GK20, GK30 Fuel And Air Line Replacement And Proper Routing, Pump Rotor, Service Procedures

12

SERVICE PROCEDURES

SERVICE PROCEDURES

Continued

FUEL AND AIR LINE REPLACEMENT AND PROPER ROUTING

1.	Remove upper shell (see page 8).
2.	Remove side cover screws using 5/16" nut driver.
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 (see Fig-
	ure 17 or 18, page 11) and from fuel filter (see page 8). If air
	line hose is damaged, disconnect from nozzle adapter (see Fig-
	ure 17 or 18, page 11) and from barb fitting on pump end cover
	(see Figure 21).
5.	Install new air and/or fuel line. Attach one end of air line hose
	to barb fitting on pump end cover (see Figure 21) and the other
	end to nozzle adapter (see Figure 17 or 18, page 11). Attach

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 24, page 13).

Note: Rotate rotor one full turn to ensure 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.

	one end of fuel line hose to fuel filter (see page 8) and the
	other end to nozzle adapter (see Figure 17 or 18, page 11).
	For GK20 model heaters, route air and fuel lines approximately
	as shown in Figure 17, page 11.
	Note: Hoses are not to be touching photocell bracket.
	For GK30 model heater, route air and fuel lines approximately
	as shown in Figure 18, page 11.
	Note: Hoses are not to be touching photocell bracket.
6.	Replace side cover.
7.	Replace upper shell and fan guard (see page 8).

Pump End

Cover

Insert

Blade

Pump Plate

Air Intake Filter

Filter End Cover

Rotor

Air Output

Filter

Fan Guard

Barb Fitting

Air Hose

Figure 21 - Air Hose to Barb FItting

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.

Figure 22 - Rotor Location, Model GK20

Blade

Pump Plate

Air Intake Filter

Filter End Cover

Rotor

Insert

Air Output

Filter

Fan Guard

Figure 23 - Rotor Location, Model GK30

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