VALVE AS-RELIEF 4848077 - Caterpillar

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Check the Fuel Correction Factor (FCF).
The FCF needs to be at 100 percent 5 percent above 50 percent load. If the FCF is not correct, adjust the fuel quality value in Cat ET until an FCF of 100 percent is attained.Recheck the turbocharger speed, If not acceptable return to step 9.
Check emissions.By using ET, monitor the NOx PPM. The NOx PPM screen will display the value shown on the analyzer ( 10 PPM) for a 5 minute period. If not, return to step 8.
Remove the turbocharger speed sensor.
Stop the engine and Allow To Cool! Then access the sensor and the wiring harness.
Remove the wiring harness by unlocking the bayonet type lock ring and remove the harness away from the engine.
Clean the area around the speed sensor and the speed sensor connector.
Remove the speed sensor by using a deep well socket in order to prevent damage.
Inspect the threaded plug and the O-ring. Replace the o-ring if necessary with Parker 0036-6087. Verify that the plug is free of debris.
Install the threaded O-ring plug and torque the plug to 10 N m (7 lb ft) to 15 N m (11 lb ft).
Install the screw on the clamping plate and torque to 10 N m (7 lb ft) to 15 N m (11 lb ft).
Start the engine and set the engine to the desired speed and load.Adjusting the Governor
The response of the throttle actuator can be adjusted with Cat ET. Use Cat ET to change these parameters:
"Governor Gain Factor"
"Governor Stability Factor"
"Governor Compensation Factor"Gain - Gain determines the speed of the controls response in adjusting for the difference between the desired condition and the actual condition. Increasing the gain provides a faster response to the difference between the desired condition and the actual condition.Stability - Stability controls the speed for elimination of the error in the difference between the desired condition and the actual condition. The stability dampens the response to the error. Increasing the stability provides less damping.Compensation - Compensation is used to adjust the time delay between the control signal and the movement of the actuator. If the compensation is too low, the engine speed will slowly hunt. If the compensation is too high, the engine speed will rapidly fluctuate.Note: The default value for these parameters is "0". The default values should be sufficient for initial start-up. However, the values may not provide optimum performance.These adjustments are provided in order to obtain optimum responses to changes in the engines load and in the engines speed. The adjustments also provide stability during steady state operation.If you have a problem with instability, always investigate other causes before you adjust the governor. For example, diagnostic codes and unstable gas pressure can cause instability.When you adjust the governor, make sure that the "Grid Status" parameter is "Off".To change the "Governor Gain Factor" or the "Governor Stability Factor", use the "Real Time Graphing" feature on the "Information" drop-down menu of Cat ET. The graph provides the best method for observing the effects of