Generator Lubrication and Maintenance (cont)

Removing and Installing Brushes - SRCR Only

TM-55-1930-209-14P-9-4 Water Purification Barges (NSN 1930-01-234-2165) Electric Power System Manual
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Generator Lubrication and Maintenance BRUSH CONTACT SPRING MINIMUM AREA TENSION LENGTH Inch mm Ounce Gram Inch mm 5/8 x 5/16 16 x 8 14 400 9/16 14 7/8 x 5/16 22 x 8 20 550 9/16 14 11/8 x 1/2 28 x 13 40 1100 3/4 19 a. If spring tension is less than shown in the chart: Push the spring forward one notch in the retainer clip. Check the spring tension. b. If the spring tension is greater than shown in the chart: Release the spring by one notch. Check the spring tension. c. If the spring tension is less than shown in the chart and the spring is in the forward notch, remove the brush and check the brush length. Removing and Installing Brushes - SRCR Only 1. Release the spring from the retainer. 3. Remove and inspect the brush. If the brush length is less than the minimum shown or if badly pitted, install a new brush. 2. Disconnect the lead wire of the brush. 4. Connect the lead wire of the brush. 5. Place the brush in the brush holder. Be sure the brush moves freely in the holder. 6. Cut a strip of "00" sandpaper the width of the brush. Never use emery cloth for this purpose. Emery contains small metallic particles which can damage the copper rings. 22

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