Lubrication, stiff links, tightening of nuts and wiping with a cloth after use. Yes, you've guessed it, it's the debut of a new monthly maintenance and product tips column. The first one kicks off with a guide to what you need to do on a regular basis to keep your machine in tip-top condition:Daily----------------------------------------Wipe monorail with a cloth after use.Every 50 hours of use (weekly for institutional users)----------------------------------------Clean and lubricate the chain with the oil provided (or 20w Motor Oil or 20w 3-in-1 oil)Check the socket screws used to install the front leg and frame lock for tightness. Also check that each toe piece nut and bolt is tight.Check battery power on monitor.Every 250 hours of use (monthly for institutional users)----------------------------------------Inspect chain for stiff links. If thorough lubrication does not help the chain should be replaced.Inspect chain-handle connection for wear. If the hole has become elongated, or the U-bolt is worn halfway through, the entire connection should be replaced.Tighten the shockcord if the handle does not return all the way to the fan enclosure. *Loosen or tighten the nuts on the Performance Monitor arm joints as necessary.Check for dust inside the flywheel with a torch. Vacuum if needed.Approximately every 800 hours of use----------------------------------------*Replace the batteries in the Performance Monitor (PM2 or PM2+). The PM2 and PM2+ use 2 AA batteries.NOTE - The monitor is a sealed unit. Do NOT take apart. Any attempt to disassemble will void the warranty. Contact Concept 2 for problems with this part.IMPORTANT: Use of the Concept 2 Indoor Rower with a worn or weakened part, such as the chain, sprockets, chain/swivel connector, handle U-bolt or shockcord, may result in injury to the user. When in doubt about the condition of any part, Concept 2 strongly advise that it be replaced immediately. Use only genuine Concept 2 parts. Use of other parts may result in injury or poor performance of the machine.