Pump Rotor
(Procedure if rotor is binding)
1.Remove upper shell (see page 10).
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" (.076/.101 mm) if needed (see Figure 22).
Note: Rotate rotor one
full turn to insure the gap is
.003"/.004" (.076/.101 mm) 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 12).
Note: If rotor is still binding, proceed as follows.
13.Perform steps 1 through 6 above.
14.Place fine grade sandpaper (600 grit) on flat surface. Sand rotor lightly in “figure 8” motion four times (see Figure 23).
15.Reinstall insert and rotor.
16.Perform steps 10 through 12 above.
14
Blade
Air
Pump Intake
Plate Filter
Filter End
Cover
Fan Guard
| Insert |
| Rotor |
| Air Output |
50 ROTOR | Filter |
PFA/P 056 |
Figure 20 - Rotor Location, 70,000 BTU/Hr Model
Pump
Blade Plate
Air
Intake
Filter
Filter End
Cover
Fan Guard
Insert
| Rotor |
| Air |
150 ROTOR | Output |
PFA/P 059 | |
| Filter |
Figure 21 - Rotor Location, 100/150,000 BTU/Hr Models
Gap Adjusting
Screw
| .003"/.004" |
| (.076/.101 mm) Gap |
| Measured With |
| Feeler Gauge |
| Sandpaper |
Blade | Rotor |
| |
Gap |
|
Adjusting |
|
Screw |
|
Figure 22 - Gap Adjusting |
|
Screw Locations | Figure 23 - Sanding Rotor |
101585
