3406E & 3456 INDUSTRIAL ENGINE Caterpillar

1. Loosen the Allen screws and disconnect the wiring harnesses from the Electronic Control Module.

2. Remove the four bolts and cover (2) from Electronic Control Module (1). Check the condition of the O-ring seal beneath cover (2). Replace it with a new one if needed. For purposes of reassembly, the torque for the bolts holding cover (2) is 1.36 N·m (12 lb in).

3. Remove personality ratings module (3).

4. Install personality ratings module (3) in the reverse order of removal.