MBE 4000 SERVICE MANUAL 6SE412 16.1 MECHANICAL TROUBLESHOOTING The tables that follow are designed to identify the causes of common problems, suggest further checks and appropriate remedies. When dealer service is necessary, this is mentioned in the table. All information subject to change without notice. (Rev. 2007) 6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION From Bulletin 1–MBE 4000–07 16-3 Problem - The Engine Will Not Crank Cause Remedy The batteries are damaged or weak. Test the batteries. Replace them, if needed. The ignition switch is damaged. Replace the ignition switch. The battery cables are damaged and/or corroded. Replace the battery cables.
The starter is damaged and/or worn. Have an authorized dealer replace the starter. The clutch or transmission is damaged. Bring the vehicle to an authorized dealer for service. There is internal damage to the engine. Bring the vehicle to an authorized dealer for service. Problem—The Engine Turns Over Slowly Cause Remedy The batteries are damaged or weak. Test the batteries. Replace them, if needed. The ignition switch is damaged. Replace the ignition switch. The battery cables are damaged and/or corroded Replace the battery cables. The starter is damaged and/or worn. Have an authorized dealer replace the starter. The engine oil does not meet the correct specifications.
Change the engine oil, using the correct type of oil. The transmission fluid does not meet the correct specifications. Change the transmission fluid, using the correct type of fluid.