On a truck's instrument cluster, what exactly does the lubrication circuit pressure gauge record?

Question

DentroTest · Accepted Answer

The pressure gauge is an instrument designed to measure the pressure of fluids. In the lubrication circuit of an engine, it indicates the pressure at which the pump sends the oil through the passages to lubricate the moving components; that pressure must stay within the values specified by the manufacturer. By contrast, the amount or level of oil in the sump is checked with the dipstick or with specific level sensors, not with a pressure gauge.

On a truck's instrument cluster, what exactly does the lubrication circuit pressure gauge record?

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