electrical line 90 is indicative of whether the oil pump unit 10 is properly operating to accommodate the outlet side electronic pressure gauge 86 an outlet side port 92 is formed into the front side of the pump cover 16 because the pump cover 16 is upstream of the pump 15 a formed passage 94 is provided through the pump cover 16 and the pump body 14 that bypasses the reservoir 26 to be in direct fluid communication with the outlet port 41 on the downstream side of the pump 15 and downstream of the solenoid valve 58 with this arrangement the outlet side port 92 is in constant communication with the pressure generated by the pump 15 when the solenoid valve 58 is open with the given arrangement downstream of the solenoid valve 58 the outlet side pressure gauge 86 will also indicate if the solenoid valve and regulating valve assembly are properly operating the outlet side pressure gauge 86 is mounted into the outlet side port 92 and provides electronic feedback on an electrical line 96 the pressure gauge data on electrical line 96 may be transmitted on telephone lines or a wireless transmitter to a remote location the data from the pressure gauges 84 86 can be used at a remote location to determine whether the oil pump unit 10 is properly operating if the data indicates a problem a service technician can be sent to maintenance repair or replace the oil pump unit 10 the source of the problem might be also be indicated by the gauges 84 86 such.