Product Manual

Table Of Contents

Owner’s Manual for Wet-Prime Trash Pumps 51

Maintenance

Impeller Installation

In all models, the distance between the tip of the impeller

blades and the surface of the wear plate must be between

0.020-0.028 in. (0.508-0.711 mm). To achieve this value,

move the wear plate away from the impeller by turning the

adjustment bushings, once you have calculated “C” as

described below.

C = (B-A+R)

A = Distance between impeller blades and machined

surface of the casing.

B = Distance between wear plate and machined surface

of the cover plate.

R = Distance between impeller blades and wear plate

0.020-0.028 in. (0.508-0.711 mm).

• Tighten the adjustment bushings to move the

cover away from the casing

• Be sure all four adjustment bushings are adjusted

evenly.

• After adjusting, be sure the shaft and impeller

rotate freely.

NOTE: Turning the adjustment bushing one flat (1/6 turn)

equals 0.015 in. (0.381 mm) of axial distance.

Figure 4-9. Impeller Position

1. Volute 2. Wear plate

3. Adjustment bushing 4. Impeller

Cover plate

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