🔍 Key Concepts

• Trace the line labeled Engine Lube Oil Pressure in the illustration and identify every component it actually touches or controls. • Consider how a pressure‑compensated governor works: what has to be compensated for, and does that require an alarm/shutdown circuit or a change in governor force balance? • Compare the source of hydraulic power for the power cylinder with the source of the engine lube oil pressure line—are they the same system or separate?

💭 Think About

• Does the engine lube oil pressure line appear to feed into the governor’s working hydraulic system (power piston / power cylinder), or only into a small diaphragm and spring arrangement? • If the lube oil pressure dropped to zero, what physical movement would occur in the diaphragm/spring assembly it is connected to, and what governor function would that change? • Look for electrical contacts or shut‑down solenoids that are operated by something other than the lube oil pressure diaphragm—what does that suggest about the purpose of the lube oil pressure connection itself?

✅ Before You Answer

• Verify exactly where the lube oil pressure passage terminates in the drawing (diaphragm, valve, power piston, etc.). • Check whether the alarm switch contacts or shutdown solenoid are mechanically linked to the lube oil pressure diaphragm, or if they are actuated from another part of the governor. • Confirm which fluid actually supplies hydraulic power to the power cylinder in the diagram—governor oil from the internal pump, or engine lube oil pressure.