Page 4 of Roller Conveyor Chains by U.S. Tsubaki

roller conveyor chain inspection checklist lubrication manual carefully follow lubrication schedule drip inspect the filling of oiler cups and the rate of feed check that the feed cups are not clogged and are properly positioned over the chain bath inspect the oil level and check that there is no sludge drain flush and refill the system as the application requires automatic inspect grease lubrication reservoir and fill accordingly manually grease joints periodically to ensure proper grease injection from system if the chains have not been lubricated properly the joints may have a brownish rusty color the pins may also be roughened grooved or galled with a permanent staining of the material due to breakdown of lubrication properly lubricated chains will not be discolored at the joints they will appear brightly polished with a high luster check link plates and sides of sprocket teeth for wear which indicates misalignment check shaft and sprocket alignment to prevent wear the pro-aligntm laser alignment system uses advanced laser technology to ensure precise chain-sprocket interaction for maximum performance check wear on the working faces of sprocket teeth these faces should develop a bright polished appearance as the system runs scratches galls grooves or visible changes in tooth form may be caused by lubrication failure or overloading check and adjust chain tension an elongation of three percent 3 or more indicates that the chain is riding near its limit of allowable height on the sprocket teeth a gradual increase in chain length is the result of normal wear a sudden increase in slack indicates one or more of the following lubrication failure excessive overloading or shock displacement of shaft bearings displacement or failure of take-ups check that the chain is free from dirt grit or other abrasive material clean the chain periodically check guides tracks and areas below the conveyor for buildup of dirt or material that will cause interference or binding of the chain entry and exit points of guides and tracks must permit the chain to pass with a minimum amount of impact or interference check that chain tracks are not over-lubricated or contaminated which can force the rollers to slide rather than roll inspect apron and pan bead openings if the beads have been wedged apart or otherwise distorted fine material may bleed into moving parts and cause excessive wear 35

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