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100 ROTOR-Domestic PFA/P 059A
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 com-
pressed air.
8. Install insert and rotor.
9. Check gap on rotor. Adjust to
.076/.101 mm (.003"/.004") if
needed (see Figure 17).
Note:
Rotate rotor one full turn to
insure 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 11).
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 18).
15.Reinstall insert and rotor.
16.Perform steps 10 through 12 above.
Fan Guard
Filter End Cover
Air Intake Filter
Pump Plate
Blade
Air Output Filter
Rotor
Insert
Figure 16 - Rotor Location
Sandpaper
Figure 18 - Sanding Rotor
Figure 17 - Gap Adjusting Screw Locations
Gap Adjusting Screw
Gap Adjusting Screw
.003"/.004" Gap
Measured With
Feeler Gauge
Rotor
Blade