1990/10/01 Caterpillar

New 4C6090 Multichannel Temperature Selector Available To Aid In Diagnosing Low Power Complaints {0781}

Usage:

The new 4C6090 Multichannel Temperature Selector is a switching instrument that allows the user to rapidly switch between 16 individual type K thermocouples, such as those used to measure exhaust temperature. The measurement of exhaust temperatures is one method of locating faulty fuel injectors.

Important features of the 4C6090 Multichannel Temperature Selector are:

- An eight-channel cable pack stored in lid. An optional 4C6097 Cable Assembly (eight-channel cable pack) is available to provide 16-channel capability.

- Used with the 6V7070 or 6V7800 Digital Multimeter and a 6V9129 Temperature Adapter to digitally display the temperatures.

- Allows the serviceman to rapidly switch between 16 type K thermocouples (individual cylinder exhaust temperatures).

The 4C6090 Multichannel Temperature Selector includes a 4C6096 Adapter Cable (1), a 4C6089 Foam Insert (2), 4C6093 Cable Pack for Ch. 1 - 8(3). See the illustration. Complete operating instructions are also included.

4C6090 Multichannel Temperature Selector.

NOTE: Type K exhaust thermocouples are factory installed in:

- The 3508 Vehicular Engines in D11N and 776B Tractors and 777B Trucks, beginning with engine serial number 99W2034.

- The 3512 Vehicular Engines in 785 Trucks, beginning with engine serial number 96Z552.

- The 3516 Vehicular Engines in 789 Trucks, beginning with engine serial number 54Z404.

Caterpillar Information System:

1990/10/01 Correct Light Bulb Replacement For The 8T9290 Borescope; New Light Bulb Used {0777}

1990/10/01 What's Your Answer? {0114,1400}

1990/10/01 New Governor Control Bracket Used To Prevent Bolt Loosening {1265}

1990/10/01 New Magnetic Sensor Has Improved Shell And Potting Compound {7463,3175}

1990/09/24 Add Bolt Dampers To Oil Pump Mounting Bolts to Prevent Bolt Failures{1304}

1990/09/24 Standard Oval And High Temperature Oval Head Seals Available For Certain Hydraulic Cylinder Applications{7555,5102,5456}

1990/09/24 Sealing Threads On Switches And Sensors That Are Grounded Through The Case{1400,1900,3175,7422,7493}

1990/09/24 Two New Coolant Flow Switches Used On Machines Equipped With Electronic Monitoring System (EMS){1361,7422,7470}

1990/09/24 Improved Access To Hydraulic Oil Level Indicator Harness{7490}

1990/09/24 New Fixed Length Door Stop Used{7308}

1990/09/24 Seal And Seal Holder In Transfer Gear Groups Now Serviced As One Piece{3159}

1990/09/24 New 6R2915 Seal Kit Available For 8C3866 Upper Conveyor Drive Motor{4351}

1990/10/01 Incorrect Installation Of Slow-Moving Vehicle Sign (Triangle) May Affect Cooling Performance {7405,1353,7557}

1990/10/01 Answers To Quiz In This Issue {0114,1400}

1990/10/08 Gerotor Charge Pump Used On Propel Pump; Inadequate Charge Pressure May Occur{3204,4320,5070,5082,7428}

1990/10/08 Correct Installation Of Brake Piston Seals{4251}

1990/10/08 Serviced Parts Available For 8C4773 Electric Starting Motor Group{1453}

1990/10/08 Larger Drain Hole In Air Cleaner Group{1051}

1990/10/08 All Wheel Drive System Not Disconnected For Shipping Purposes{7500}

1990/10/08 Improved Rod Seal Combinations Used In Hydraulic Cylinders{4303,5104,5456,5457,5458,5468}

1990/10/08 Improved 4J3815 Gasket Helps Prevent Oil And Air Leaks In Hydraulic Tank Mounting And Filler Groups{5065}

1990/10/08 New Exhaust Valves Are Used In Caterpillar Remanufactured Cylinder Heads{1105,1101}

1990/10/08 New Pump Group With Bolt Dampers Used In Oil Pump Group{1304}

1990/10/15 New Vibratory Coupling Group Used; Loading Of Eccentric Weight Dampened{6605,6606,6645}