Desa BC165DT - Manuel (Page 14)

14 116170-01A www.desatech.com
SERVICE PROCEDURES
Continued
Pump
Plate
Insert
Rotor
Blade
Filter
End
Cover
Air Intake
Filter
Air Output Filter
Figure 29 - Rotor Location, 115/165
Models
Insert
Blade
Rotor
Pump Plate
Air
Intake
Filter
Air Output Filter
Filter End Cover
PUMP ROTOR
(Procedure if Rotor is Binding)
1. Remove upper shell (see Upper Shell Re-
moval , page 10).
2. Remove filter end cover screws using 5/16"
nut driver (see Figure 28 or 29).
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 (see Figure
28 or 29).
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 30, page 15).
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 (see Upper
Shell Removal , page 10).
12. Adjust pump pressure (see Pump Pressure
Adjustment , page 11).
Figure 28 - Rotor Location, 40/55/70
Models
Figure 27 - Air Hose to Barb Fitting
Air Hose
Pump End Cover
Barb
Fitting
115/165 Models 40/55/70 Models
Barb Fitting
FUEL AND AIR LINE REPLACEMENT
AND PROPER ROUTING
1. Remove upper shell (see Upper Shell Re-
moval , page 10).
2. Remove side cover screws using 5/16" nut
driver (see Figure 19 or 20, page 11).
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 Figure 23 or 24) and
from fuel filter (see Fuel Filter, page 11). If air
line hose is damaged, disconnect from nozzle
adapter (see Figure 23, page 12 or Figure 24,
page 13) and from barb fitting on pump end
cover (see Figure 27).
5. Install new air and/or fuel line. Attach one
end of air line hose to barb fitting on pump
end cover (see Figure 27) and the other end
to nozzle adapter (see Figure 23, page 12 or
Figure 24, page 13). Attach one end of fuel
line hose to fuel filter (see Fuel Filter, page
11) and the other end to nozzle adapter (see
Figure 23, page 12 or Figure 24, page 13).
Note: Route hoses as shown in Figure 23, page
12 or Figure 24, page 13, according to model.
Hoses are not to touch photocell bracket.
6. Replace side cover.
7. Replace upper shell and fan guard (see Upper
Shell Removal , page 10).