1999/02/01 Caterpillar

Improvements Made On Gas Engine Wiring Groups{1900,1907}

Usage:

G3606 (3XF),
G3608 (4WF),
G3612 (1YG),
G3616 (4CG) Engines

Description of Change: The Wiring Groups in the above engines have been improved in the following ways:

* The new oil pressure sensor group replaces the former pressure sensor group.

* The new oil pressure sensor group has the new pressure sensor that replaces the former pressure sensor. The new sensors have strengthened signals. The strengthened signals in this new pressure sensor will reduce the occurrence of the "Zero Differential Oil Pressure" signal on the CMS.

* The new speed sensor replaces the former speed sensor. The new speed sensor has strengthened signals at low crank rpm. This strengthened signal may reduce the no-magneto interface fault.

Adaptable To: The new 164-3692 Pressure Sensor Group replaces the former 107-3952 Pressure Sensor Group. The new 149-7241 Pressure Sensor replaces the former 3E-3531 Pressure Sensor. The new 7X-1168 Speed Sensor replaces the former 8L-4171 Speed Sensor.

The following is a list of engines and wiring groups that have the new pressure sensor group, pressure sensor, and speed sensor:

* G3606 Engines with the 142-2851 Wiring Group.

* G3608 Engines with the 142-5015 Wiring Group.

* G3612 Engines with the 125-3849 Wiring Group.

* G3616 Engines with the 125-3875 Wiring Group.

Caterpillar Information System:

1999/02/01 New Woodward EGB13P Reverse Acting Actuator Assembly{1716}

1999/02/01 New Valve Improves Fuel Pressure Regulator Adjustment On 3600 Diesel Engines{1715}

1999/02/01 New Relief Valves Used In Prelube Lines Groups And Starting Motor Air Pressure Regulator Groups{1451,1469}

1999/02/01 Extended Life Coolant (ELC) Now Preferred For 3600 Diesel Engines{1395}

1999/02/01 New Intermittent Prelube Basic Pump Group And Bracket Assembly Used{1319}

1999/02/01 Crankshaft Oil Passage Plugs Should Be Checked For Tightness On Some Crankshafts At Engine Overhauls{1202}

1999/02/01 New Thicker Jacket Water Side Cover Help Prevent Coolant Leaks{1201}

1999/02/01 New Cylinder Head Gaskets (Combustion Rings) Available{1124}

1999/02/01 New Prechamber Assembly And Ignition Body Assembly In Prechamber Groups{1106}

1999/02/01 Use 151-8689 Seal Template Tool For Cylinder Head Combustion Surface Inspection{1101}

1999/02/01 New Exhaust Manifold Shield Assemblies Provide Increased Heat Protection For Wastegate Area{1067}

1999/02/01 New Lines Groups Available To Eliminate Leakage In Air Piping{1058,1071}

1999/02/01 Woodward Hand Held Programmers (Control Programmers) Available For Use With Woodward 700 Series Controllers (Governor Control Groups){1930,1908}

1999/02/01 Particle Sensor Group Improved{7430}

1999/02/01 Caterpillar Now Has Parts Support For Previously Non-Supported Custom Parts{7567}

1999/02/01 Use 152-7143 Cable Assembly For Flash-Programming Generator Status Control Module{4450}

1999/03/01 New Top Piston Rings Available {1215}

1999/03/01 Use 170-9227 Reamer Shims To Aid In Reaming 3100 Engine Injector Sleeves {1250}

1999/03/01 New Piston With 4 mm Wide Oil Ring Reduces Light Load Oil Consumption {1214,1215,1225}

1999/03/01 Use 145-5247 And 147-2675 Wear Sleeve Installer To Install Crankshaft Wear Sleeves {1202}

1999/03/01 New Flywheel Housing Gasket For 3406 Engines {1157}

1999/03/01 Use 132-8263 Spanner Wrench To Remove And Install Terminal Assembly In Electronic Ignition System (EIS) Transformer Group {0712,1409}

1999/03/01 New Engine Pressure Sensors Available {1916,1917,1922,1923,1924}

1999/03/01 Use 146-2727 Tool Group To Monitor And Check Engine Performance On 3600 Engines {1000}