HOUSING AS-PUMP 4N0779 - Caterpillar

3408B, 3408C (8RG),
3412, 3412C (3JK) Marine EnginesDescription of Change: New personality modules (PM's) are available for 3412 High Performance Marine Engines with E, D and C ratings and 3408 High Performance Marine Engines with E, D and C ratings. An additional rating of 1250 HP at 2300 rpm has been added to the "E" personality module for the 3412. The following features have been added to the personality modules for both engines in all three ratings:
Rack Setting - Higher rack setting at low speeds to improve acceleration.
Low Oil Pressure Warning - Low oil pressure warning set point at low idle changed from 140 kPa (20 psi) to 100 kPa (14 psi).
High Coolant Temperature Warning - High coolant temperature warning changed from 99°C (210°F) to 103°C (217°F).
Air/Fuel Ratio Maps - The third Air/Fuel Ratio map has been changed. The engine is shipped from the factory with the Map 1 setting. Map 2 has a richer Air/Fuel setting than Map 1 and now Map 3 has a richer Air/Fuel setting than Map 2.
Slow Vessel Mode Operation - Slow vessel mode will allow the engine to operate at 550 rpm. The Electronic Control System (ECM) checks the Slow Vessel Mode operation switch input on pin 7 of the ECM connector. When this switch is activated (Contact to -Battery) the idle speed will change from the customer programmable idle to 550 rpm. This feature should only be used for tight maneuvering and slow vessel operation, such as No-Wake zones. The ECM will not allow Slow Vessel Mode activation until the engine has run for a minimum of five seconds.
Transmission Oil Pressure Warning Range - The set point warning range has increased. The new range is from 700 kPa (101 psi) to 2962 kPa (430 psi).
Adaptable To: The new personality modules are adaptable to all 3408 High Performance Marine (8RG) and 3412 High Performance Marine (3JK) Engines. Chart A identifies the new personality modules. Chart B identifies the ratings for 3408 and 3412 Marine Engines. The additional 3412 rating of 1250 HP at 2300 rpm is supported by Map 4 of the "E" rating personality module.
Caterpillar requires that any 3412 Marine Engines converted to the new "E" personality module to use the 1250 HP rating also install the new cover assemblies for the temperature regulators identified in Chart C. Chart C also identifies the gaskets and plugs required to replace the former cover assemblies with the new cover assemblies. The cover assemblies identified in the chart will also fit 3408B 8RG1-UP and 3412 3JK1-UP regardless of horsepower rating.