R

PORTABLE FORCED AIR HEATERS

SERVICE

PROCEDURES

Continued

Pump Rotor

(Procedure if rotor is binding)

1.Remove upper shell (see page 8).

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 .076/.101 mm (.003"/.004") if needed (see Fig- ure 27).

Note: Rotate rotor one full turn to insure the gap is .076/.101 mm (.003"/.004") at tight- est 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 10).

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 Fig- ure 28).

15.Reinstall insert and rotor.

16.Perform steps 10 through 12 above.

Blade

Air

Pump Intake

Plate Filter

Filter End

Cover

Fan Guard

Insert

Rotor

Air Output

Filter

Figure 25 - Rotor Location, 35/70,000 Btu/Hr Models

Pump

Blade Plate

Air Intake

Filter

Filter End

Cover

Fan Guard

Insert

Rotor

Air Output

Filter

Figure 26 - Rotor Location, 100/150,000 Btu/Hr Models

Gap Adjusting

Screw

.076/.101 mm (.003"/.004") Gap Measured With Feeler Gauge

Sandpaper

Rotor

Blade

 

Gap Adjusting

 

Screw

 

Figure 27 - Gap Adjusting Screw

Figure 28 - Sanding Rotor

Locations

12

104468

Page 12
Image 12
Master Lock B70CEA, B35CEA, B150CEA, B100CEA owner manual Pump Rotor, Procedure if rotor is binding

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