New ECM Controlled Variable Speed Fan Clutch Group Available {1356}
Usage:
785B (6HK),
789B (7EK),
793B (1HL) Trucks
A new variable speed fan clutch group is available for 785B, 789B, and 793B Trucks. This new variable speed fan clutch group is controlled by the engine Electronic Control Module (ECM) and is belt driven by the crankshaft pulley.
The new ECM controlled variable speed fan clutch went into production beginning with the 785B (6HK523-Up), 789B (7EK392-Up), and 793B (1HL412-Up) Trucks. The new clutch group is adaptable to trucks that are equipped with the electronic unit injector (EUI) system.
For more information refer to Special Instruction REHS0023 entitled "New ECM Controlled Variable Speed Fan Clutch Group Available For 785B, 789B, And 793B Trucks".
Caterpillar Information System:
1997/02/24 Special Instructions Now Available For 793C Off-Highway Truck Assembly Procedure {0374}
1997/02/24 New Hydraulic Oil Temperature Sender And Hydraulic Oil Temperature Gauge More Responsive {7450,7488}
1997/02/24 New Water Temperature Regulator Improves Cab Heating In Cold Weather Conditions {1350,1355}
1997/02/24 Some Service Parts Available For Engine Fuel Injection Pump {1251}
1997/02/24 New Tooling Simplifies Steering Pump Neutral Adjustment {5070,0738}
1997/02/24 New Tube Assembly And Associated Hardware In The Engine Turbocharger Oil Lines Group {1307}
1997/02/17 VIMS-PC Version 2.1 Now Available {7601}
1997/02/17 Improved Speed Sensor Group Used {1907}
1997/02/17 New Flow Control Valve For Water Spray System Available {5614,5137}
1997/02/17 Wiring Harness Modification Improves Service Life Of The Cab Wiring Group {1435,1400,1408}
1997/02/17 Fuel Gauges Now Available {7450,7481,7483,1273}
1997/02/17 Rings Can Be Installed In The Rear Suspension Group To Improve Bushing Service Life {7217}
1997/02/24 Thicker Washer Used To Allow Proper Fastening Of Elbow In Transmission Oil Lines Group {3154,3030}
1997/02/24 New Sight Gauge On Rear Axle Housing Improves Serviceability {3260}
1997/02/24 Service Parts Are Available For 9T-4785 Accumulator Group {4331,5077}
1997/02/24 New Longer Thrust Pin And Bolts Now Used In Rear Suspension Cylinders To Increase Service Life Of Joint {7213,7201,7200}
1997/02/24 Correction To Lift Arm Position Sensor Adjustment {0685}
1997/02/24 New Radiator Group Includes Improved Radiator Core Assembly {1353}
1997/02/24 New Electronic Transmission Control Group Used {3032,3100}
1997/02/24 Service Manual, Secondary Steering System, Supplemental Information Available {4300,4306,4307,4324,4339,7568}
1997/02/24 Wiper Arm Retaining Nut Requires Tightening After Initial Operation {7305}
1997/02/24 New Bevel Gear Set For Telehandler Front And Rear Differential Groups Improves Service Life {3256}
1997/02/24 New Telehandler And Material Handler Differential Lock Parts Improve Service Life {3258,3264}
1997/02/24 Cold Weather Steering For Telehandlers Improves With Additional Parts {4300,4307}