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101487
Fan
IMPORTANT:
Remove fan
from motor shaft before
removing motor from heater.
The weight of the motor
resting on the fan could
damage the fan pitch.
1. Remove upper shell (see
page 10).
2. Use 1/8" allen wrench to
loosen setscrew which
holds fan to motor shaft.
3. Slip fan off motor shaft.
4. Clean fan using a soft cloth
moistened with kerosene or
solvent.
5. Dry fan thoroughly.
6. Replace fan on motor
shaft. Place fan hub flush
with end of motor shaft
(see Figure 18).
7. Place setscrew on flat of
shaft. Tighten setscrew
firmly (4.5-5.6 n-m/40-50
inch-pounds).
8. Replace fan guard and
upper shell.
Figure 15 - Gap Adjusting Screw Locations
Gap Adjusting
Screw
Gap
Adjusting
Screw
Blade
Rotor
.076/.101 mm
(.003"/.004") Gap
Measured With
Feeler Gauge
Fan
Motor
Shaft
Setscrew
Flush
Figure 18 - Fan Cross Section
Setscrew
Fan
Motor
Shaft
Figure 17 - Fan, Motor Shaft, and
Setscrew Location
Figure 16 - Sanding Rotor
Sandpaper
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,
page 13.
14. Place fine grade sandpaper
(600 grit) on flat surface.
Sand rotor lightly in
“figure 8” motion four
times (see Figure 16).
15. Reinstall insert and rotor.
16. Perform steps 10 through
12 above.