1998/10/01 Caterpillar

New Seawater Pump Manifold Improves Priming{1371}

Usage:

3412 (7BL),
3412C (3JK) High Performance Marine Engines

Description of Change: A new seawater pump manifold is being used on the above listed engines. The new manifold incorporates a boss which is cast into the manifold at a different height.

Adaptable To: The new 151-5705 Manifold replaces former 100-3068 Manifold. This manifold is a component of 109-1660 Pump Group. The former 100-3068 Manifold is cancelled.

(1) 151-5705 Manifold

(2) Port in 100-3067 Manifold

If port (2) is used for water supply to an auxiliary cooler and the seawater pump does not maintain prime, then install 151-5705 Manifold (1) and relocate the water supply to the port on manifold (1). This will improve priming characteristics of the seawater pump. A different length of hose will need to be installed for this retrofit. The 100-3067 Manifold (right side) does not need to be replaced. A plug will need to be installed in port (2).

Caterpillar Information System:

1998/10/01 Improved 133-9096 Diaphragm Assembly Available For Catalyst Engines{1266}

1998/10/01 Troubleshooting Reminder For Engine Low Power Or Intermittent Low Power Symptoms{1250,1252,1256,1260,1261,1273}

1998/09/01 Fabricated Spark Plug Gapping Tool {0766,1555}

1998/09/01 New Cylinder Liner Sleeve Used {1216}

1998/09/01 New Exhaust Valves Have Improved Resistance To Radial Cracking {1105}

1998/09/01 3600 Diesel Marine Monitoring System Owner's Manual Has Been Revised {0374}

1998/09/01 Turbocharger Vent Lines Important For Engine Reliability {1380}

1998/09/01 Some Benefits Of The New 146-2588 Spark Plug {1555}

1998/09/01 New Gear And New Shaft Assemblies Used In Scavenge Oil Pump Groups {1312}

1998/09/01 Non-E-Trim Unit Injectors No Longer Produced For 3500B Engines {1290}

1998/09/01 New Spacer Plate Gasket Provides Improved Sealing {1221}

1998/09/01 Recommended Lubrication And Torque Procedure For Connecting Rod Bolts {1218}

1998/10/01 New Injector Sleeve Bore Gauge And Tube Brush Available For Injector Sleeve Bore; New Grommet Available For Unit Injector Electrical Connection{1713,1290}

1998/10/01 Flash File Bulletin Board System To Be Discontinued{1920}

1998/10/01 New Carburetor Assembly For G300 Series Engines{1266}

1998/10/01 New Coil Kits Replace Shielded Transformer{1554,1561}

1998/10/01 New Seal Assembly Used In Turbocharger Group{1052}

1998/10/01 New High Inertia Camshaft Drive Gear Available{1212}

1998/10/01 New Connecting Rod Assembly Provides Increased Rod Eye Bushing Retention{1218}

1998/10/01 New Spacer Plate Gasket Provides Improved Sealing{1221}

1998/10/01 Oil Filter Groups For All Commercial 3500 Series Engines Have Been Improved{1306}

1998/10/01 New Gear And New Shaft Assemblies Used In Scavenge Oil Pump Groups{1312}

1998/10/01 3600 High Exhaust Temperature Guided Diagnostics Available In SIS{0372}

1998/10/01 Limited Number Of 105-4365 Electronic Actuator Groups Remain In Parts System{1250}