LiftMaster SW470 SW490 S3 BOARD Manual - Page 23

Required Maintenance - Normal Usage 23 Required Maintenance - Normal Usage Internal speed sensor External safety systems Gate caution signs Manual disconnect Sprockets & pulleys Gate Accessories Electrical Frame bolts Total unit Month Intervals Check for proper operation Check for proper operation Make sure they are present Check & operate Check for set screw tightness Inspect for wear or damage Check all for proper operation Inspect all wire connections Check for tightness Inspect for wear or damage Check at least once every 1 3 6 12 " " " " " " " " " COMPLETE CHECK OUT Table 9 NOTES A. CAUTION: When servicing, always disconnect operator from electrical power supply. B. Severe or high cycle usage will require more frequent maintenance checks. C. Inspection and service should always be performed anytime a malfunction is observed or suspected. D. Limit switches may have to be reset after any major drive chain adjustments. E. If lubricating drive chain, use only a proper chain lube spray or a lightweight motor oil. Never use grease or silicone spray. F. When servicing, please do some "house cleaning" of the operator and the area around the operator. Pick up any debris in the area. Clean the operator if needed. G. It is suggested that while you are at the site, you take some voltage readings of the operator. Using a VOM, double check the incoming voltage to the operator to make sure it is within ten percent of the operator's rating. H. While you are at the site, it would be a good time to let the owner or manager know about any new items available or any safety items that could and should be added to the site. Doc 01-G0665 Rev C