1994/02/14 Caterpillar

Engine Coolant Temperature Gauge May Run High{7400,7453}

Usage:

Challenger 65C (2ZJ),
Challenger 75C (4KK) Agricultural Tractors

SUPPLEMENT: JUNE 13, 1994

Service Magazine; February 14, 1994; Page 4;" Engine Coolant Temperature Gauge May Run High " on Challenger 65C, Challenger 70C, Challenger 75C, and Challenger 85C Agricultural Tractors.

The 111-3194 Coolant Sender/Switch is effective with Challenger 65C (2ZJ569-Up), Challenger 70C (2YL244-up), Challenger 75C (4KK586-Up), and Challenger 85C (9TK287-Up) Agricultural Tractors.

--------------- END SUPPLEMENT ---------------

The calibration of the sender portion of the 107-4658 Coolant Sender and the 3E7544 Coolant Sender may cause a high temperature indication under normal operating conditions. Both the 107-4658 Coolant Sender and the 3E7544 Coolant Sender are replaced by a 111-3194 Coolant Sender. The new sender switch is calibrated to allow the gauge to run in the middle of the range under normal operating conditions.

Caterpillar Information System:

1994/02/14 Air-To-Air Aftercooler Assembly Mounting Brackets Improved{1063}

1994/02/14 Multipurpose Tractor Oil (MTO) Is Usable In All Challenger Implement Hydraulic And Combined Implement And Steering Hydraulic Systems{5068,5050,5450}

1994/02/07 Fuel Injection Pump Improvements{1251}

1994/02/07 Cylinder Head Gaskets Improved To Provide Better Fire Ring Retention{1124}

1994/02/07 New Turbocharger Groups And New Turbocharger Cartridge Groups Have Improved Thrust Bearing And Turbine Ring Seal{1052,1053}

1994/02/07 12 And 24 Volt DC Work Lights Are Available{0600}

1994/02/07 Longer Grease Hose Assembly Used In Fan Belt Tightener Groups{1358,1359}

1994/02/07 New Piston Body Has Improved Bonding Between Iron Band And Aluminum Body{1214}

1994/02/07 New Magnetic Drain Plug For Vibratory Bearing Reservoir Provides Early Warning Of Wear{6606}

1994/02/07 Suspension Control Valve Mounting Group Bolt Torque Specification Is Reduced To Prevent Control Valve Sticking And Scuffing{7214}

1994/02/07 Sump Guard Assembly (Crankcase Guard) Is Deeper And Has Thicker Material To Improve Clearance And Resist Bending{7151}

1994/02/07 New Wheel Bearing Adjustment Procedures{4208}

1994/02/14 Thicker Retaining Ring Is Available For Use With CAT® GraderBit Assemblies{6151,6150}

1994/02/14 Publications Available For Off Highway Truck Retrofits{1290,1631,1900,3100,3150}

1994/02/14 Improved Wheel Bearing Cone Anti-Rotation System Prevents Wheel Bearing Cones From Rotating On The Axle Housing{4208,4234}

1994/02/14 Shorter Stud Used To Improve Sealing Between The Radiator Cap Assembly And Filler Adapter{1382,1353}

1994/02/14 New Universal Joint Groups Have Improved Sealing{3251,3253}

1994/02/14 Improved Mounting Method For Hydraulic Quick Hitch Pins{5133}

1994/02/21 New Parts Service Friction Disc Available For Machines With Shift Harshness Complaints {3150,3155}

1994/02/21 Right Hand Console Reinforcement {5258}

1994/02/21 Improved Hydraulic Coupler Has Plated Parts To Resist Corrosion {6129,5057}

1994/02/21 Frame Reinforcement For Challengers With Gel-Filled Front Idlers and Front Counterweights {7050}

1994/02/21 Replaceable Sleeve Bearings Can Be Installed In The Circle Assembly And Moldboard Rail Brackets {6154,6157}

1994/02/21 New Suspension Cylinder Rod Seals For Arctic Region Applications {7201,7213}