HOSE AS 1482104 - Caterpillar

Probable Causes
Low trip point for engine overspeed
Signal from the signal driver in the master Electronic Control Module (ECM) for the actuator of the throttle
Energy of the driven equipment
Slow governor response
Binding of the throttle actuatorRecommended Repairs
Check the Trip Point
Note: Do not program the trip point for engine overspeed higher than the maximum ratings of the driven equipment.The trip point or engine overspeed may be too low. Verify that the trip point for the engine overspeed is properly programmed. Typically, this parameter is set at 118 percent of rated speed.This parameter requires a factory password in order to change the trip point. Change the trip point to an acceptable speed.Check for Diagnostic Codes that Relate to the Signal from the Signal Driver in the Master ECM
Check for diagnostic codes that relate to the actuator of the throttle.Investigate the diagnostic code(s). Make the necessary repairs.Check the Driven Equipment
Determine if the driven equipment has additional inputs of energy that could drive the engine beyond the rated rpm. Make corrections to the installation in order to prevent the overspeed from recurring.Check for Slow Governor Response
Observe the "Speed Governor Adjustment" screen on the Caterpillar Electronic Technician (ET). Look for the engine response to the worst cases for step-loading and unloading.Check for Binding of the Throttle Actuator
Set the engine control to the OFF/RESET mode. Remove the electrical power from the engine. Move the throttle plate while you feel the motion. If the motion is sticky and/or rough, investigate the cause of the binding. Make the necessary repairs.