Hi guys, in our company we have a FD fan which is supported by two pillow blocks (sleeve bearings). One is 'fixed' while the other is 'free'. I would like to know what is the difference between the two.
Also, quite recently we noticed that the color of bearing lube oil turned black. We tried to flush the oil online several times (meaning draining and filling the oil simultaneously as we cannot stop the FD fan due to operational reasons). But the oil color did not change and is still dark greyish or blackish in color. Later I found that the oil which we have been using was Regal R&O 100 but the recommended one was Regal R&O 68. So, I would also like to know what can cause the color of oil to turn black. There was no apparent metallic debris in the drained oil as well. Also, would this wrong oil or higher viscosity oil that we have been using might have caused bearing damage of some kind and turn the oil black.
Thanks for the help...
Also, quite recently we noticed that the color of bearing lube oil turned black. We tried to flush the oil online several times (meaning draining and filling the oil simultaneously as we cannot stop the FD fan due to operational reasons). But the oil color did not change and is still dark greyish or blackish in color. Later I found that the oil which we have been using was Regal R&O 100 but the recommended one was Regal R&O 68. So, I would also like to know what can cause the color of oil to turn black. There was no apparent metallic debris in the drained oil as well. Also, would this wrong oil or higher viscosity oil that we have been using might have caused bearing damage of some kind and turn the oil black.
Thanks for the help...