Use and Care Manual

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160942-01A14
PUMP ROTOR
(Procedure if Rotor is Binding)
1. Remove upper shell (see Upper Shell
Removal, page 9).
2. Remove filter end cover screws using
5/16" nut driver (see Figure 17).
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 18).
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
0.076/0.101 mm (0.003"/0.004") if needed
(see Figure 18).
Note: Rotate rotor one full turn to ensure
the gap is 0.076/0.101 mm (0.003"/0.004")
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 9).
12. Adjust pump pressure (see Pump Pres-
sure Adjustment, page 11).
Note: If rotor is still binding, proceed as
follows.
13. Perform steps 1 through 6.
14. Place fine grade sandpaper (600 grit) on
flat surface. Sand rotor lightly in “figure 8”
motion four times (see Figure 19).
15. Reinstall insert and rotor.
16. Perform steps 10 through 12.
Figure 17 - Rotor Location
Pump
Cover
Insert
Rotor
Blade
Filter
End
Cover
Air
Intake
Filter
Air Output Filter
Gap Adjusting Screw
Rotor
Blade
0.003"/0.004"
(0.076-0.101 mm)
Gap Measured
With Feeler
Gauge
Gap Adjusting Screw
Figure 18 - Gap Adjusting Screw
Locations
Sandpaper
Figure 19 - Sanding Rotor
SERVICE PROCEDURES
Pump
Plate