Remove the oil pressure sender.
Install a pressure gauge [Figure 60-60-7].
Start the engine and run until it is at operating temperature.
If the oil pressure is less than the allowable limit, check the following items:
* Engine Oil Level Low
* Oil Pump Defective
* Oil Galley Plugged
* Oil Strainer Plugged
* Excessive Clearance at the Rod And Main Bearings
* Oil Pump Relief Valve Stuck
