Following steps 5 and 6 above, perform the same procedure for the opposite side.

2.Remove the armature assembly at the top portion of the hopper loader to properly seat the replacement brushes.

3.Insert a strip of 600-grit sandpaper with the rough side facing the brush.

4.Release the brush and rotate the commutator back and forth by hand (See the alternative seating procedure on the facing page) so that the brush is sanded to match the arc of the commutator.

5.In older motors, the wear of the brushes creates a shallow trough in the commutator. Sand the brush to conform to the contour.

6.Remove the sandpaper, and repeat steps 5 and 6, as needed until all brushes are replaced.

7.Reinstall the armature assembly.

Seating Motor Brushes

You have two (2) options for seating motor brushes (Steps 5 to 11):

Option 1

„Run the powder hopper loader at 50% to 75% voltage for about 30 minutes.

„Apply power from a variable transformer at the motor disconnect, not at the control box.

Option 2

„Connect two (2) hopper loader motors in series and run them for about 30 minutes.

WARNING! On motors using white AMP disconnects, make sure power is not applied to the green ground wire; otherwise, the motor housing becomes electrically “hot.”

Reducing line voltage may be accomplished by using a variable transformer or by connecting two identical motors in series.

Powder Hopper Loaders

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Sterling 238, 882, 0 manual Seating Motor Brushes
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238, 0, 882 specifications

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