This instructor-led course is designed to provide participants who have completed Komatsu Tier 4 Interim and Final engine classes, the necessary technical training to effectively troubleshoot and repair Komatsu Tier 4 Engine products (4D95, 4D107, 6D107, 6D114, 6D125, 6D140, and 6D170). This course is developed to aid the participant with the completion of Flash News 12061C. All troubleshooting procedures contained in the 12061C Flash News will be explained and performed including the use of the Insite tool, used as a diagnostic aid for the after-treatment system. Hands-on training will take place using representative Komatsu products utilizing the required tooling to complete Flash News 12061C. Hands on exercises will also include actual machine problems for the participant to troubleshoot and diagnose.