Reasons for the decrease in lubricant viscosity
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Why does the viscosity of lubricating oil decrease after it has been in use for some time? After analysis, the viscosity of anti-wear hydraulic oil No. 46 was 40.6; its color turned orange-red. It has been in use for about a period of time in an environment without high temperatures, and its moisture level and other parameters were within acceptable limits
The decrease in viscosity is caused by rising temperatures and pressures, and the change can be significant; therefore, when specifying a certain lubricant, it is necessary to indicate the temperature at which it was tested. Changes in viscosity mainly affect the increase in temperature of lubrication systems in mechanical equipment. It is also possible that some material has entered, causing the viscosity to decrease.
#Here quickly: 1. Other media have entered the system； Reply#
It’s possible that some materials have entered the pump; mainly light materials (those with a low saturated vapor pressure) have condensed inside the pump, mixing with the lubricating oil. :):):)