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We have 2 6B GE dual fuel Peaking units that went in service in 2001. We do not run that often, have roughly 3000 fired hours on the units. We do quarterly oil sample/testing on each unit with no issues from the testing facility in regards to oil quality. We change lube oil filters once a year even if we don't run.
Question 1: On a filter change we have noticed "blue-ing" on the filters. I have heard of oil varnishing, is this the color that would indicate varnishing? I realize this is a broad general question but thought I would start the conversation. We do not treat the oil at all with off base equipment. We are cycling through our servos, shipping them out to be cleaned and noticed this "blue-ing" on the servo filters. This is the first time they have been removed except for a couple of failures thru the years.
Question 2: Would you recommend a yearly change out of all the servos as a PM?
Question 1: On a filter change we have noticed "blue-ing" on the filters. I have heard of oil varnishing, is this the color that would indicate varnishing? I realize this is a broad general question but thought I would start the conversation. We do not treat the oil at all with off base equipment. We are cycling through our servos, shipping them out to be cleaned and noticed this "blue-ing" on the servo filters. This is the first time they have been removed except for a couple of failures thru the years.
Question 2: Would you recommend a yearly change out of all the servos as a PM?