SEAL-O-RING 7L4774 - Caterpillar

The ECM automatically performs the following functions for low engine oil pressure:
Warning
ShutdownThe strategy is based on a map of the engine oil pressure versus the engine rpm. For engines that are rated up to 1300 rpm, see Illustration 1. For engines that are rated at 1301 rpm and above, see Illustration 2. The default settings that are programmed at the factory are listed in Table 1.
Table 1
Engine Oil Pressure    
Parameter     Default Settings    
Hysteresis     Map    
Activation delay     10 seconds    
Security level     Required password    
Warning setpoint     Map    
Warning delay     4 seconds    
Shutdown setpoint     Map    
Shutdown delay     9 seconds    
Illustration 1 g00570830
Map of the engine oil pressure versus the engine rpm for engines that are rated up to 1300 rpm (Y) Engine oil pressure in kPa (X) Engine rpm (1) Hysteresis (2) Minimum engine oil pressure
Illustration 2 g00592294
Map of the engine oil pressure versus the engine rpm for engines that are rated at 1301 rpm and above (Y) Engine oil pressure in kPa (X) Engine rpm (1) Hysteresis (2) Minimum engine oil pressureIf the engine oil pressure is below the minimum pressure for four seconds, a warning will occur. To deactivate the warning, the engine oil pressure must rise above the hysteresis that is set in the map.If the engine oil pressure is below the minimum pressure for nine seconds, a shutdown will occur.The map cannot be reprogrammed.Oil Pressure Input Circuit
Oil pressure is monitored in the oil gallery by the oil pressure sensor which is located on the front left corner of the engine. The 5.0 0.5 VDC operating voltage for this sensor is supplied by the ECM. The output of the oil pressure sensor is a 0.14 to 4.42 volts DC signal. The voltage is dependent upon the oil pressure. The voltage is interpreted by the ECM as oil pressure.