Service Procedures; Pump Rotor - Desa 125T Owner's Manual

SERVICE PROCEDURES

Continued
Note: Route hoses as shown in Figure 17, page
12 or Figure 20 according to model. Hoses are
not to touch photocell bracket.
6. Replace control cover.
7. Replace upper shell (see Upper Shell Removal,
page 10).

PUMP ROTOR

(Procedure if Rotor is Binding)
1. Remove upper shell (see Upper Shell Re-
moval, page 10).
2. Remove fan guard.
3. Remove filter end cover screws using 5/16"
nut driver (see Figure 23).
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 23).
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 Figure 24).
Note: Rotate rotor one full turn to ensure the
gap is .076/.101 mm (.003"/.004") at tightest
position. Adjust if needed.
11. Install blades, pump plate, air filters and filter
end cover.
12. Replace fan guard and upper shell (see Upper
Shell Removal, page 10).
13. Adjust pump pressure (see Pump Pressure
Adjustment, page 10).
Note: If rotor is still binding, proceed as follows.
14. Perform steps 1 through 6.
15. Place fine grade sandpaper (600 grit) on flat
surface. Sand rotor lightly in "figure 8" motion
four times (see Figure 25).
16. Reinstall insert and rotor.
17. Perform steps 10 through 12.
14
Insert
Air Output Filter
Gap Adjusting Screw
Figure 24 - Gap Adjusting Screw
Sandpaper
www.desatech.com
Blade
Rotor
Figure 23 - Rotor Location
Rotor
Blade
Gap Adjusting Screw
Locations
Figure 25 - Sanding Rotor
Fuse Holder
Figure 26- Replacing Fuse
Pump Plate
Air
Intake
Filter
Filter End
Cover
.003"/.004"
(.076-.101 mm)
Gap Measured
With Feeler
Gauge
Fuse
113170-01E