Over a couple of beers me and my mate Pete, a retired farmer from Bundy got into a heated debate about the benefits of oil samples when buying a used machine. His opinion was that if the samples came up with a clean report he would be confident the machine would be ok.
This blind faith in a lab test was starting to get up my goat. You cow cockey’s should be running around in a white coat I told him, because you send everything to the lab. You test the soil, the water, the crop, the bull semen,you probably test the wife and kids for signs of city slicker. After he calmed down a bit I gave him my 2 cents worth.
Firstly oil sampling is a valuable tool when done scientifically as part of your ongoing maintenance planning to monitor sudden changes in the wear characteristics of a particular component. Firstly you must test the oil when new to establish the base particle count. Secondly the oil storage and filling containers must be kept dry and clean. Thirdly you must test the oil at the same engine hours each time. Fourthly you must test the oil in the same manner each time.
Always get the machine up to operating temp and run all systems. Take the sample at the filter inlet as a sump sample will usually have the larger particles already removed by the filters.
When buying a used machine the results can be misleading as often the oil and filters are changed prior to going on sale so you are getting the results for new oil and you have no idea how the sample was conducted.
By all means read the oil sample data proffered as a major failure will show up. But use this information in conjunction with system testing before you commit to a price or a contract.
Mechtronik does not sell machinery, we systematically inspect your next production unit not only to tell you the condition but to give real negotiating muscle when it comes down to what the market value will be.
David Armstrong C.E.O. of mechtronik.com.au can be contacted on 0409641195