Exercise Due Diligence (CONT’D FROM PAGE 58)
uct. If even that is not possible, such as when the machine is no longer under power, insist on a video of the machine taken while it was still producing. Unfortunately, videos are poor substitutes since careful editing can make a poor machine look good. I remember an OEM that required a whole day to get five minutes of uninterrupted operation when filming a promotional video in our facility. The machine was a dog, but the video made it look fantastic! The risks increase if the equipment is no longer in op- eration and can only be run without product; if it has been dismantled and in storage the risks increase exponentially. Maintenance and production records are invaluable in assessing a machine’s condition. Sometimes historical in- spection records are available from the OEM, or the seller will allow you to commission the OEM or third party to con- duct an inspection on your behalf. Is the machine configured as originally manufactured, or have sections of different vintages or manufacturers been combined? What aftermarket components and up- grades have been installed, and have all changes been documented? For that matter, what documentation is being provid- ed with the machine (e.g. schematics, PLC programs, and parts, maintenance, and operating manuals) and has it been updated to accurately represent the current configu- ration? Is missing documentation available from the OEM? CONTINUED ON PAGE 62
der power, by competent personnel. Obviously, check that all features work. In addition, check for signs of problems such as vibra- tion when running at production speeds and – on open- ing and closing machines – that sections close tightly and don’t gap when running. Check for hydraulic and pneumatic leaks, particularly on solenoid valve banks. Check the gears for backlash and chipped teeth, and the gearboxes for grease in lieu of oil and for severely contaminated oil. Check all rolls, par- ticularly anilox and rubber rolls. Not only is reconditioning or replacing them expensive, but damage and wear pat- terns can tell you a lot about the condition of the machine. Check registration and squareness of product. These are but a limited number of things to inspect, as there are many other factors that are important, some unique to the particular machine of interest. A competent inspector should know what to look for. When it is impossible for you to inspect the equipment due to its location or other fac- tors, hire the OEM or someone reputable to inspect it and submit a report of their findings. As mentioned previously, the equipment should be ob- served while running production; if still under power, ask the seller to run a trial for you with representative product. When that’s not possible, ask to see it run without prod-
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April 24, 2023
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