17.7 HIGH INLET AIR TEMPERATURE 17.7 HIGH INLET AIR TEMPERATURE To determine if high inlet air temperature is causing lack of power, perform the following: 1. Test the radiator fan, fan drive, or fan shroud for proper operation or configuration; refer to OEM guidelines. NOTE: The engine will be torque limited to protect the turbocharger and charge air cooler; this is normal engine operation for component protection. 2. Examine test results. [a] If the radiator fan, fan drive, or fan shroud pass OEM test, check high altitude operation; refer to section . [b] If the radiator fan, drive or shroud did not operate correctly; refer to section 17.7.1.
17.7.1 Radiator Fan, Drive and Shroud Replacement Perform the following steps to replace the radiator fan, drive and or shroud: 1. Remove and replace the radiator fan, drive and/or shroud; refer to OEM guidelines. 2. Verify replacement; refer to section 17.7.1.1. 17.7.1.1 Test the Engine with Radiator Fan, Fan Drive, or Fan Shroud Replacement Perform the following steps to determine if replaced radiator fan, fan drive, or fan shroud resolved lack of power condition: To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.
ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. 1. Start and run the engine. 2. Test drive the vehicle to ensure lack of power has been resolved. (Rev. 2007) All information subject to change without notice. 17-20 From Bulletin 1–MBE 4000–07 6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION