Desa RC55T Service Procedures, Continued, Pump Rotor, Procedure if Rotor is Binding, Locations

SERVICE PROCEDURES

Continued

PUMP ROTOR

(Procedure if Rotor is Binding)

1.Remove upper shell (see Upper Shell Re- moval, page 9).

2.Remove filter end cover screws using 5/16" nut-driver (see Figure 25 or 26).

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 27).

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 (see Upper Shell Removal, page 9).

12.Adjust pump pressure (see Pump Pressure Adjustment, page 10).

Note: If rotor is still binding, proceed as follows.

13.Perform steps 1 thru 6.

14.Place fine grade sandpaper (600 grit) on flat surface. Sand rotor lightly in “figure 8” motion four times (see Figure 28).

15.Reinstall insert and rotor.

16.Perform steps 10 thru 12.

Blade

Pump Plate

Air Intake Filter

Filter End

Cover

Insert

Rotor Air Output

Filter

Fan Guard

Figure 25 - Rotor Location, 40/55T/70T

Models

Blade

Pump Plate

Air Intake Filter

Filter End Cover

Fan Guard

Insert

Rotor

Air Output

Filter

Figure 26 - Rotor Location, 115T/165T

Models

Gap Adjusting Screw

	.003"/.004"
	(.076-.101 mm)
	Gap Measured
	With Feeler
	Gauge
	Rotor
Blade	Gap Adjusting Screw
Figure 27 - Gap Adjusting Screw
	Locations
	Sandpaper

Figure 28 - Sanding Rotor

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