 andrewbp
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Joined: May 2011  FL, USA
 Posts: 554 Feedback: 100% (83) |
Posted: 6/26/2012 2:49:17 AM
THE IMAGE ABOVE IS A PAID ADVERTISEMENT So a friend is offering me a Robinair eight CFM vacuum pump for $100. What do I need to look and doto it one before buying to make sure is a fully operational piece of equipment and not past its useful life. Also I assume it's a good price for one. Thing looks almost brand-new. |
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proto_moose
Magnets and Thermos's--How do they work?!?
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Joined: Jul 2010 IN, USA
Posts: 1830 Feedback: 100% (1) Link To This Post |
Posted: 6/26/2012 9:59:58 AM
[Last Edit: 6/26/2012 10:00:42 AM by proto_moose]
Look at the oil. It should be light straw in color, not rusty or milky white. Rusty means it hasn't been changed in a long time, milky white means it's saturated with moisture and should have been changed at last use. This will give you an idea of maintenance.
If you have a micron gauge, or can borrow one, make sure it pulls down to at least 100 microns, although I would prefer to see it at 20-50. If the oil is milky white, it may not pull down because of moisture saturation. Chaning the oil before the pumpdown test will show a more accurate performance. ETA: spelling and semantics. |
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