Pump Rotor - Desa 125T Owner's Manual

SERVICE PROCEDURES
12
SERVICE PROCEDURES
Continued
5. Carefully remove nozzle from nozzle adapter using 5/8" socket
wrench (see Figure 18).
6. Blow compressed air through face of nozzle. This will re-
move any debris in nozzle.
7. Inspect nozzle seal for damage.
8. Replace nozzle into nozzle adapter until nozzle seats. Tighten
80-110 inch-pounds.
9. Attach nozzle adapter bracket to combustion chamber with two
screws removed in step 3, page 11.
10. Repeat steps 9 through 16 under Ignitor, page 10.
Nozzle
Face
Nozzle
Nozzle Adapter
Bracket
Air Line Fitting
Figure 18 - Nozzle and Nozzle Adapter
FUEL AND AIR LINE REPLACEMENT AND
PROPER ROUTING
1. Remove upper shell (see Upper Shell Removal, page 8).
2. Remove control cover screws using phillips screwdriver (see
Figure 11, page 9).
3. Remove control 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 14 or Figure 17 according to model, page 11) and from
fuel filter (see Fuel Filter, page 9). If air line hose is damaged,
disconnect from nozzle adapter (see Figure 14 or Figure 17
according to model, page 11) and from barb fitting on pump
end cover (see Figure 19).
5. Install new air and/or fuel line. Attach one end of air line hose
to barb fitting on pump end cover (see Figure 19) and the other
end to nozzle adapter (see Figure 14 or Figure 17 according to
model, page 11). Attach one end of fuel line hose to fuel filter
(see Fuel Filter, page 9) and the other end to nozzle adapter
(see Figure 14 or Figure 17 according to model, page 11).
Pump End
Cover
Air Hose
Figure 19 - Air Hose to Barb Fitting
Nozzle
Sleeve
Nozzle
Adapter
Fuel Line
Fitting
Barb Fitting
For more information, visit www.desatech.com
For more information, visit www.desatech.com
Note: Route hoses as shown in Figure 14 or Figure 17 accord-
ing to model, page 11. Hoses are not to touch photocell bracket.
6. Replace control cover.
7. Replace upper shell (see Upper Shell Removal, page 8).

PUMP ROTOR

(Procedure if Rotor is Binding)
1. Remove upper shell (see Upper Shell Removal, page 8).
2. Remove fan guard.
3. Remove filter end cover screws using 5/16" nut driver (see
Figure 20).
4. Remove filter end cover and air filters.
5. Remove pump plate screws using 5/16" nut-driver.
6. Remove pump plate.
7. Remove rotor, insert, and blades (see Figure 20).
8. Check for debris in pump. If debris is found, blow out with
compressed air.
9. Install insert and rotor.
10. Check gap on rotor. Adjust to .076/.101 mm (.003"/.004") if
needed (see Figure21).
Note: Rotate rotor one full turn to ensure the gap is .076/.101 mm
(.003"/.004") at tightest position. Adjust if needed.
Rotor
Insert
Air Output
Filter
Figure 20 - Rotor Location
Gap Adjusting Screw
Blade
Gap Adjusting Screw
Figure 21 - Gap Adjusting Screw Locations
Blade
Pump Plate
Air Intake
Filter
Filter End
Cover
.003"/.004"
(.076-.101 mm)
Gap Measured
With Feeler
Gauge
Rotor
109891-01B