Improved Hydraulic Coupler Has Plated Parts To Resist Corrosion {6129,5057}
Usage:
Challenger 65 &
65B (7YC1-Up) Challenger 65C (2ZJ1-Up) Challenger 75 (4CJ1-Up) Challenger 75C (4KK1-Up) Tractors
Description of Change: A new quick coupler assembly is being used to prevent oil leakage due to corrosion of the valve poppet, which blocks oil when an implement hose is not plugged into the coupler. The new coupler assembly may be identified by the gold colored plating on the valve poppet.
Adaptable To: The new 105-4902 Coupler Assemblies are direct replacements for the former 8R-1070 Coupler Assemblies, which are cancelled. The change is in effect with Challenger 65C (2ZJ344) and Challenger 75C (4KK347) Tractors.
Caterpillar Information System:
1994/02/21 Right Hand Console Reinforcement {5258}
1994/02/21 New Parts Service Friction Disc Available For Machines With Shift Harshness Complaints {3150,3155}
1994/02/14 Improved Mounting Method For Hydraulic Quick Hitch Pins{5133}
1994/02/14 New Universal Joint Groups Have Improved Sealing{3251,3253}
1994/02/14 Shorter Stud Used To Improve Sealing Between The Radiator Cap Assembly And Filler Adapter{1382,1353}
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 Publications Available For Off Highway Truck Retrofits{1290,1631,1900,3100,3150}
1994/02/14 Thicker Retaining Ring Is Available For Use With CAT® GraderBit Assemblies{6151,6150}
1994/02/14 Engine Coolant Temperature Gauge May Run High{7400,7453}
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}
1994/02/21 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}
1994/02/21 Improved Screen Used In The Brake Oil Cooler {1366,4295}
1994/02/21 Usage of Transmission Hand Controls {3168}
1994/02/21 Direction Of Drum Rotation Can Be Changed; Chain Case Hub Must Be Shimmed Correctly {5634}
1994/02/21 Performance Of Rotor Axle Seal Depends On Correct Shimming Procedure {5634}
1994/02/21 Servicing Lighted Rocker Switches {1435}
1994/02/28 New Shroud Assembly Now Available for Power Take Off {1165}
1994/02/28 Fuel Sump Tank Drain Valve Protection Available {1279}
1994/02/28 Implement Status Switch Harness Modifications {1408,7490}
1994/02/28 New Resistor Provides Higher Intermediate Speed of Air Conditioner Fan {7320,7337}