BUSHING AS-ROLLER 4978889 - Caterpillar

Programming the Parameters for the Governor Gain
The parameters are set at the factory. The factory default settings are recommended for most applications. The default settings should allow the engine to respond quickly to transient load changes. The default settings should allow the engine to remain stable during all operating conditions. If the factory default setting does not provide satisfactory performance, the parameters in Table 1 can be adjusted.
Table 1
Parameter Valid Range
Governor Gain Factor 0 - 40000
Governor Minimum Stability Factor 0 - 40000
Governor Maximum Stability Factor 0 - 40000 Note: No engineering units are associated with the "valid ranges" in Table 1.Note: The range of the programmable setting is wide for flexibility. Do not expect to use the whole range. If the programmable setting is set to 0, the system will revert to the factory default value.Gain Explanations
Governor Gain Factor
The governor gain factor is multiplied by the engine speed error. This value is derived by calculating the difference between the desired speed and the actual speed.
If the value for the governor gain factor is too large, the engine speed can overshoot the desired speed.
If the value for the governor gain factor is too small, the engine will accelerate slowly.Governor Minimum/Maximum Stability Factor
The governor minimum stability factor functions in order to eliminate steady state speed error. The governor minimum stability factor is used by the Electronic Control Module (ECM) when the steady state speed error is less than 20 rpm.The governor maximum stability factor functions in order to eliminate steady state speed error. The governor maximum stability factor is used by the ECM when the steady state speed error is increasing and the engine speed error is greater than 20 rpm.
If the governor minimum stability factor or the governor maximum stability factor is set too high, the ECM will provide additional fuel. The additional fuel will cause the engine speed to overshoot. The additional fuel will also cause the engine speed to oscillate.
If the governor minimum stability factor or the governor maximum stability factor is set too low, the engine will not achieve a steady state operation quickly.Tuning Procedure
Note: Record any adjustment to a governor setting. Write a brief summary about the engine response. Documenting each change to a parameter setting will allow you to attain the optimum engine response in the shortest amount of time.
Turn the Fuel Control Switch to the OFF position. Connect the Caterpillar Electronic Technician (ET). Enable the engine overspeed protection prior to the adjustment procedure. Adjusting governor gain parameters without engine overspeed protection can result in serious engine damage. Ensure that engine overspeed protection is ON. Engine overspeed is configured on the setup screen of "Service Monitoring System" in Cat ET.
Personal injury or death can result from engine overspeed.If the engine overspeeds, it can cause injury or parts damage. The engine should be equipped with a separate shutdown device, to protect against engine overspeed. Do not use for emergency shutdown.
Note: Ensure that the engine is running correctly before attempting any tuning of the governor. For