Applied Failure Analysis and Reuse & Salvage Publications Have Been Updated To Aid in Identifying Cause of Inlet Valve Radial Crack on Certain C175 Engines {1100} Caterpillar

Electric Power Generation

C175-16 GEN SET (S/N: WYB1-UP)

Description Of Change: Failure Analysis has been updated to include more possible failure modes caused by poor maintenance practices and poor performing injectors. Internal injector damage, due to low-pressure fuels systems issues, cause high cylinder temps, cylinder to cylinder temperature variation, and abnormal fueling events resulting in cracked intake valves.

Adaptable To: It is recommended to: change poor performing injectors to reduce cylinder to cylinder temperature variation. Clean the air manifolds and clean the after cooler core of any internal debris . Adjust monitoring system set points to warn the customer of possible issue. Activate the high exhaust temperature warning/shutdowns based on specific sites operating conditions and customer needs. If an intake valve fails, replace it with a 273-1224 Inlet Valve.

Reference: Applied Failure Analysis and Reuse and Salvage publications have been updated to identify failure mode and reusability concerns. SEBF8002, Visual Inspection of Valves, Valve Springs, and Valve Bridges, SEBF9050, Engine Valve Failure Modes.