LIFTER AS-VALVE 9Y4011 - Caterpillar

EngineG3516H (S/N: NWH1-UP; NWJ1-UP; GLM1-UP; GLN1-UP)G3520H (S/N: GFP1-UP; GFR1-UP)Generator SetCG170-16 (S/N: KSJ1-UP)Introduction
The problem that is identified below does not have a known permanent solution. Until a solution is found, use the temporary solution that is identified below.Problem
430-4521 Spark Plugs are being replaced prematurely due to the secondary voltage output warning setting being incorrect.Solution
Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.
The secondary voltage output warning setting in the monitoring system should be configured to 97%. Until recently, the setting has been set to 80% at the factory.Reference: Refer to Troubleshooting, M0074324 for the complete troubleshooting of the ignition system.