1997/08/01 Caterpillar

Guidelines For Electrically Grounding Gas Engines {7423}

Usage:

All Caterpillar Gas Engines

The following guidelines are recommended for electrically grounding a gas engine:

* The battery negative terminal (-) should NOT be connected to the cylinder block.

* All metal cases enclosing electrical/electronic controls should be connected to the cylinder block with an electrical ground strap.

* The cylinder block should be connected to the customer provided connection to the electrical ground plan/grid.

* The battery negative terminal (-) should be connected to the customer provided connection to the electrical ground plan/grid.

* Any flexible connection in the engine cooling circuit pipes should be "jumped" with an electrical ground strap so there is a "continuous" electrical connection from the radiator to the cylinder block.

Caterpillar Information System:

1997/08/01 Fuel Injector Trim Set Screw {1290}

1997/08/01 New Schedule For Cleaning Unit Injectors In Engines In Heavy Fuel Oil (HFO) Applications {1290}

1997/08/01 New Gear Assemblies With A Stronger Shaft Are Used In Governor Drive Groups {1288}

1997/08/01 Procedures For Changing From Running On Heavy Fuel Oil (HFO) To Running On Distillate Fuel {1280}

1997/08/01 Connecting Rod Bearing Part Numbers {1203,1219,1230}

1997/08/01 Crankshaft Oil Passage Plugs {1202}

1997/08/01 New Torque Specification For Some Bolts In Valve Mechanism Group {1102,1123}

1997/08/01 Revised Starting Procedure For Engines Using Kiene Valves {1100}

1997/08/01 New Manual Valve Group [Measure Cylinder Pressure (Kiene® Valve)] Used; Kiene Valve Installation Procedure {1100,1118}

1997/08/01 Installation Procedure For Cylinder Head Studs {1100}

1997/08/01 Changes To Cylinder Head Salvage Procedure {1100}

1997/08/01 Air Quality Requirements For Turbocharger Air Impingement System {1052}

1997/08/01 Changes To Default Overcurrent Settings For EMCP II+ {4490}

1997/09/15 New Dual Stage Torsional Coupling Assembly Available For Use With Twin Disc MG 514C Marine Transmissions{3357}

1997/09/15 3406C Pump And Governor Changes Provide Improved Oil And Fuel Leak Resistence{7555}

1997/09/15 Improvements Made For Exhaust Manifold Groups{1059}

1997/09/15 New Exhaust Shield Groups Use Soft Wrap Insulation Instead Of Hot Box Shielding{1067}

1997/09/15 Instrument Panel Lines Groups Changed In Order To Improve Mounting Of The Fumes Disposal Group{1071}

1997/09/15 New Spark Plug On G3500 Engines Improves Reliability{1555}

1997/09/15 Self-Locking Bolt Used On Cylinder Block Cover Groups{7553}

1997/09/15 Stainless Steel Bolts Replace The Former Waspaloy Bolts{1059}

1997/09/15 Bellows Replaces Flange And Pipe In Water Aftercooler Groups{1063}

1997/09/15 New Manifold Soft-Wrap Shields Improve Reliability{1067}

1997/09/15 Gas Admission Valve (GAV) Changed In Order To Provide For The Use Of Dial Indicator Settings{1102}