SCREW 3898741 - Caterpillar

Aftercooler Coolant Temperature
Note: The following information concerns engines with separate circuit aftercooling. For engines with jacket water aftercooling, monitoring of the aftercooler coolant temperature is disabled. However, the jacket water coolant temperature is monitored for all engines.The ECM will automatically perform the following functions when high aftercooler coolant temperature occurs:
Warning
Derating
Shut downThe default settings that are programmed at the factory are listed in Table 12.
Table 12
Aftercooler Coolant Temperature
Parameter Default Setting
Warning setpoint 50 °C (122 °F)
Warning delay 5 seconds
Derate setpoint 107 °C (225 °F)
Derate delay 5 seconds
Maximum time of derating 480 seconds
Hysteresis 3 °C (5.4 °F)
Security level No required password
Maximum derating 25%
Shutdown setpoint 107 °C (225 °F)
Shutdown delay 5 seconds If the aftercooler coolant temperature is above 50 °C (122 °F) for five seconds, a warning will occur. To deactivate the warning, the aftercooler coolant temperature must be below 47 °C (117 °F).If the aftercooler coolant temperature is above 107 °C (225 °F) for five seconds, a derating will occur. The continuous schedule of the derating will reach 25 percent in 480 seconds.When the aftercooler coolant temperature is less than 104 °C (220 °F), the percent of the derating is decreased until full power is restored. However, if the aftercooler coolant temperature rises above the setpoint again, the derating resumes.If the aftercooler coolant temperature is above 107 °C (225 °F) for five seconds, a shutdown will occur. Transmission Oil Pressure
The ECM automatically warns the operator of low transmission oil pressure. This strategy detects actual low transmission oil pressure. The strategy does not activate when the transmission is shifted or when the transmission is in neutral.The default settings that are programmed at the factory are listed in Table 13.
Table 13
Low Transmission Oil Pressure
Parameter Default Setting
Warning setpoint 1500 kPa (218 psi)
Warning delay 5 seconds
Hysteresis 10 kPa (1.5 psi)
Security level No required password
Arming pressure 862 kPa (125 psi)
Arming delay 10 seconds The strategy must be armed. The strategy is armed when the transmission oil pressure rises above 862 kPa (125 psi) for ten seconds.If the transmission oil pressure is less than 862 kPa (125 psi), the monitoring system assumes that the transmission is in neutral. In this case, the strategy is disarmed. The warning will only activate when the transmission oil pressure is between 862 kPa (125 psi) and 1500 kPa (218 psi).If the transmission oil pressure is between 862 kPa (125 psi) and 1500 kPa (218 psi) for five seconds, a warning will occur. To deactivate the warning, the pressure must be more than 1510 kPa (219 psi).The setpoint can be programmed to a value between 1000 kPa (145 psi) and 3000 kPa (435 psi).Transmission Oil Temperature
The ECM automatically warns the operator of high transmission oil temperature. The default settings that are programmed at the factory are listed in Table 14.
Table 14
High Transmission Oil Temperature
Parameter Default Setting
Warning setpoint 99 °C (210 °F)
Warning delay 5 seconds
Hysteresis 5 °C (9 °F)
Security level No required password If the transmission oil temperature is more than 99 °C