PLATE 1535956 - Caterpillar

Probable Cause
Valve ComponentsRecommended Actions
Table 1
Troubleshooting Test Step Value Result
1. Check the Valve Components
A. Inspect the following components for damage:
- Valve rotators
- Spring locks
- Valve springs
- Valves
B. Ensure that the valve has not contacted the piston. If the valve has contacted the piston, check the exhaust system for debris.
Components
Result: The valve components are damaged.
Repair: Replace the damaged components.
A valve rotator that is cracked or a valve rotator that is broken is an indication of an engine overspeed. Determine the cause of the engine overspeed. Repair the condition.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).