1997/03/01 Caterpillar

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

Usage:

G3412 (6ZM),
G3508 (4WD, 9TG),
G3512 (5JD, 7NJ),
G3516 (8LD, 4EK) Industrial Engines

Description of Change: A new terminal-mounted resistor assembly has been created in order to allow for proper loading of Digital Diagnostic Tool (DDT) data line. The new resistor assembly has been relocated within the panel assembly. The terminal block and the component plug included within the former resister assembly is eliminated with the new resister assembly.

Adaptable To: The new 121-9195 Resistor Assembly eliminates the need for the 3E-0356 Terminal Block and the 115-2542 Component Plug which were included within the following groups:

4P-9566 Instrument Panel Group,

103-6193 Instrument Panel Group, and

114-8140 Junction Box Group.

The new resistor assembly is located across the Engine Information System (EIS) control module data link line at terminal strips T264 and T265.

Illustration 1. Typical of 4P-9566 and 103-6193 Instrument Panel Groups: (1) New 121-9195 Resistor Assembly. (2) Panel assembly.

Illustration 2 (Close-up of Illustration 1): (1) 121-9195 Resistor Assembly. (3) Terminal T265. (4) Terminal T264.

Illustration 3. 114-8140 Junction Box Group: (1) New 121-9195 Resistor Assembly. (2) Panel assembly.

Illustration 4 (Close-up of Illustration 3): (1) 121-9195 Resistor Assembly. (3) Terminal T265. (4) Terminal T264.

The following chart lists the necessary parts included within the new 121-9195 Resistor Assembly.

Caterpillar Information System:

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 4C-8180 Timing Tool Group Required For Checking And Adjusting Fuel Injection Timing On 3408C And 3412C High Performance Marine Engines{1250}

1997/03/01 Marine Transmission Oil Pressure Sensor Location{3323}

1997/03/01 Product Support Literature Available{0374,1000}

1997/03/01 Caterpillar Part Numbers Are Used For XQ Rental, Generator Set Circuit Breakers{4461}

1997/03/01 Diode Removed From Junction Box Group{1400,1417}

1997/03/01 New O-Ring Seal Used In Hydraulically Actuated Electronic Unit Injector (HEUI) Pump Group{1714}

1997/03/01 New Turbocharger Group And Air Cleaner Mounting Group Provide Improved Reliability{1051,1052}

1997/02/17 New Spark Plug Provides Better Heat Resistance {1555}

1997/02/17 New Relay Modules Replace Relay Assembly In Junction Box Groups {1400,1408}

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

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

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 Aftercooler Groups{1063}

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

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

1997/03/01 Valve Rotator Inspection{1109}

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 Improved Junction Box Group (Inline){7451}

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}