Generator Lubrication and MaintenanceEvery 500 Service Meter UnitsInspecting Slip Rings-SRCR Only1. Remove the three lower panels from the rear of thegenerator housing.The color may be shiny copper, straw, chocolate orblack. The important thing is the color must be uniformto indicate a satisfactory condition.3. If a ring contains blotches of green, blue or black,clean the ring with a cleaning solvent that does not leavean oily film such as Naptha.WARNINGDo not use gasoline or carbontetrachloride. The vapors fromcarbon tetrachloride can beextremely harmful when inhaled.Either solvent will dissolveinsulation.Each brush must move freely within its holder and haveenough spring load to prevent brush flotation.2. Inspect the color of each slip ring.4. Inspect each ring for pitting, roughness, or eccentricwear. If any of these conditions are present, contactyour Caterpillar dealer; the rings must be reconditioned.5. If pitting is found, determine if the cause is (a) or (b):a. Check the rating on the generator nameplate. Thegenerator load must be within this rating. Determine ifthe generator may have been operated in an overloadcondition.b. Check the brushes for incorrect spring tension.Using a small spring scale, calibrated in ounces, lift eachspring and check the spring tension for each brush.21
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