1997/03/01 Caterpillar

Improved Junction Box Group (Inline){7451}

Usage:

G3606 (3XF),
G3608 (4WF) Industrial Engines

Description of Change: An improved junction box group (inline) has been released for the above engines. The improved junction box group (inline) increases reliability. The improved junction box group (inline) includes a new duct that is resistant to higher temperatures.

Adaptable To: The improved 125-3904 Junction Box Group (Inline) replaces the former 122-0803 Junction Box Group. The improved 125-3904 Junction Box Group (Inline) duct can be recognized by its gray color. The former 122-0803 Junction Box Group duct is white in color.

NOTE: The improved 125-3904 Junction Box Group (Inline) replaces the former 122-0803 Junction Box Group on inline engines only.

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NOTICE

The heat shield must be kept in place on the exhaust manifold if the former white colored junction box group duct is present and the door for the junction box group should remain closed. If not, the lower heat resistant duct will deform.

Caterpillar Information System:

1997/03/01 New Procedure For Tightening Bolts On Center Cluster Stub Shaft And Camshaft Idler Stub Shafts In Rear Gear Groups{1206,1237}

1997/03/01 Valve Rotator Inspection{1109}

1997/03/01 New Electronic Actuator Group Provides Improved Reliability{1050,1250,1900}

1997/03/01 Improved Fan Spider Assembly Available{1356}

1997/03/01 New Gasket Used In Aftercooler Groups{1063}

1997/03/01 New Adapters In Turbocharger Groups Provide Improved Sealing Between The Turbocharger And Exhaust Elbow{1061,1065}

1997/03/01 New Gasket Used In Turbocharger Groups{1052,1061}

1997/03/01 New "E" Rating Of 1350 Horsepower Available For 3412C High Performance Marine Engine{1902}

1997/03/01 New Terminal-Mounted Resistor Assembly Allows Proper Loading Of Digital Diagnostic Tool Data Line{1417}

1997/03/01 The Components Of The 7C-5001, 100-8227, And 104-6775 Gas Pressure Regulator Groups Are Available For Parts Service{1270}

1997/03/01 Improvements Made To Remanufactured 0R-3008 Fuel Transfer Pump{1256}

1997/03/01 Improved Bushing O-Ring Seal Available For Injection Pump Groups{1251}

1997/03/01 New Software For Customer Communications Module (CCM){1920,1926}

1997/04/01 New "Fuel System Reuse And Salvage Guides" Reference Manual Available{1250}

1997/04/01 Low Idle Adjustment, Additional "Buffer" Spring Adjustment Screw Used On Marine Governors{1264}

1997/04/01 132-3904 Camshaft Retainer Holds Camshaft In Cylinder Head{1100}

1997/04/01 New Exhaust Manifold Sections Have Locations To Install Temperature Sensors{1059}

1997/04/01 New Single Piece Inlet Valve{1103,1105}

1997/04/01 Serviceable Components Available For 7C-1193 Temperature Control Group (Aftercooler){1063}

1997/04/01 Improved Damper Guard Groups Are Available In Variable Speed Engines{1205}

1997/04/01 Recommendation For Connecting Rod Bearing Replacement{1219}

1997/04/01 Improved, Stronger Oil Pan Available{1302}

1997/04/01 Improved EG-3P Actuator Assembly For 3406 Engines{1903}

1997/04/01 New Two-Piece Clamp Assembly Prevents O-Ring Bore Wear And Leakage{7554}