Detroit Diesel — MBE4000 SERVICE MANUAL

A Detroit Diesel service procedure — check it applies to your exact model before use.

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Procedure

1. Rotate the safety latch down to release the engine wiring harness connector and disconnect it from the DDEC-ECU unit. See Figure 2-27.
2. Engine Wiring Harness
3. Engine Electrical Connector
4. Safety Latch Figure 2-27 Engine Electrical Connector
5. Remove the mounting bolts and rubber spacers holding the DDEC-ECU control unit to the engine. Then remove the unit. NOTE: Do not disassemble the DDEC-ECU control unit. It cannot be serviced.
6. Position the spacers, DDEC-ECU control unit, and mounting bolts on the cylinder block, as removed.
7. Install the DDEC-ECU control unit on the cylinder block. Tighten the mounting bolts to 15 N·m (11 lb·ft).
8. Install the fuel heat exchanger on the DDEC-ECU and tighten the mounting bolts to 8 N·m (6 lb·ft).
9. Connect the vehicle wiring harness to the DDEC-ECU. Pull down on the locking unit to lock it in place. All information subject to change without notice. (Rev. 3/04) 6SE412 0403 Copyright © 2006 DETROIT DIESEL CORPORATION From Bulletin 2–MBE4000–06 2-39
10. Connect the engine wiring harness to the DDEC-ECU. Rotate the safety latch upward to lock it in place.
11. If a new DDEC-ECU control unit was installed, transfer the customer parameter list to it, using minidiag2.
12. Connect the batteries. PERSONAL INJURY Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. □ Always start and operate an engine in a well ventilated area. □ If operating an engine in an enclosed area, vent the exhaust to the outside. □ Do not modify or tamper with the exhaust system or emission control system.
13. Close the hood. Then check for normal operation. (Rev. 3/04) All information subject to change without notice. 2-40 From Bulletin 2–MBE4000–06 6SE412 0403 Copyright © 2006 DETROIT DIESEL CORPORATION

Source: manual:2-mbe4000-06a - Revised Fuel Filter Removal and Installation Procedure.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.