PISTON GROUP TO CONNECTING ROD 4N9258 - Caterpillar

Probable Causes
Engine shutdown switches
Diagnostic codes and event codes
Batteries
Engine starting system
Flywheel ring gear
Driven equipment
Engine accessories
Hydraulic cylinder lock
Internal engine problem
Configuration parametersRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Table 1
Troubleshooting Test Steps Values Results
1. Check the Engine Shutdown Switches
A. The engine shutdown switches should be in the RUN position. Ensure that the shutdown switches are in the proper positions. Use Caterpillar Electronic Technician (ET) to verify the status of the "EMCP" and the "Remote E-Stop Switch" parameters.
B. When a shutdown occurs, the Electronic Control Module (ECM) must be powered down for at least 15 seconds prior to attempting to start the engine.
Shutdown Switches
Results: The shutdown switches are OK.
Repair: Proceed to the next Step
Results: The shutdown switch is NOT OK.
Repair: Perform the necessary repairs.
If the problem is not resolved, proceed to the next step.
2. Check the Batteries
A. Inspect the batteries.
B. Charge the batteries, if necessary. Refer to Special Instruction, SEHS7633, "Battery Test Procedure".
C. Load test the batteries. Refer to Special Instruction, SEHS9249, "Use of 4C-4911 Battery Load Tester for 6, 8 V and 12 V Lead Acid Batteries"
Batteries
Results: The batteries are OK.
Repair: Proceed to the next Step
Results: The batteries are NOT OK.
Repair: Perform the necessary repairs.
If the problem is not resolved, proceed to the next step.
3. Check the Electric Starting System (if applicable)
A. If the application is equipped with an electric starting system, perform the following procedure:
a. Check the wiring to the starting motor solenoid. Refer to the electrical schematic.
b. Check the engine start switch and the engine start relay for electrical power.
c. Check the starting motor cables. If the starting motor cables are corroded, remove the starting motor cables and clean the starting motor cables.
d. Test the operation of the starting motors.
Starter
Results: The electric starter is OK.
Repair: Proceed to Test Step 7
Proceed to Test Step
Results: The electric starter is NOT OK.
Repair: Perform the necessary repairs.
If the problem is not resolved, proceed to the next step.
4. Check the Air Starting System (if applicable)
A. If the application is equipped with an air start system, perform the following procedure:
a. Verify that the air start system has an adequate supply pressure for starting.
b. Check the wiring to the air start relay that is for the air starting motors. Refer