SPRING-CONTROL SHAFT 6N7284 - Caterpillar

Test Step 1. CHECK THE SETPOINTS.This step checks the following setpoints: P009 (ring gear teeth) and P010 (engine overspeed).
View the setpoints P009 and P010. Make a note of setpoints P009 and P010. See System Operation, "Engine/Generator Setpoint Viewing OP2-0".
Compare the actual setpoints with the specified setpoints for the particular generator set.Expected Result:The actual setpoint value and the specified setpoint value should agree.Results:
OK - The setpoints match. Proceed to Test Step 2.
NOT OK - The setpoints do not agree.Repair: Reprogram setpoints P009, P010 and P014. See System Operation, "Engine/Generator Programming OP5-0". Stop.Test Step 2. CHECK FOR POSSIBLE CAUSES.
Check for the possible causes of the engine overspeed condition. Refer to the Engine Service Manual and/or the Governor Service Manuals.Expected Result:No cause should be found.Results:
OK - No cause should be found. Proceed to Test Step 3.
NOT OK - The cause is found.Repair: Replace the necessary engine or governor components. Stop.Test Step 3. CHECK THE ENGINE OVERSPEED FUNCTION.
When possible, disable the engine from reaching rated speed.
Turn the engine control switch (ECS) to OFF/RESET and then turn the switch to START.
Slowly increase the RPM to rated speed.Expected Result:The engine should not overspeed. The GSC+ should not shut down the engine. The GSC+ should not issue an overspeed fault.Results:
OK - The engine reaches rated speed. The GSC+ does not issue an overspeed fault and the GSC+ does not shut down the engine. The GSC+ and the system are functioning properly. Repair: Perform an overspeed verification. See System Operation, "Engine Setpoint Verification OP9". Stop.
NOT OK - Repair: The engine overspeeds and the GSC+ issues an overspeed fault. Refer to the Engine Service Manual and/or the Governor Service Manual in order to find the cause of the problem. Stop.