New Torque Converter Ring (Seal) Used To Improve Service Life {3100}
Usage:
789 (9ZC),
789B (7EK),
793 (3SJ),
793B (1HL) Off-Highway Trucks
Description of Change: A new torque converter ring (seal) is available. The new ring (seal) is made of improved material which will increase service life.
Adaptable To: The new 128-1663 Ring (Seal) is a direct replacement for the former 7T-2219 Ring (Seal). This change is effective with 116-5808 Torque Converter Group (S/N 3KT320) and 116-5810 Torque Converter Group (S/N 3LT190) and is adaptable to all earlier torque converter groups.
Typical view of a torque converter group. Callout (A) designates 128-1663 Ring (Seal).
Caterpillar Information System:
1996/06/10 Service Magazine Special Edition, SEPD0305, Available {0374}
1996/06/10 Hydraulic Valve Groups Use New Implement Quick Couplers {6129,5057,5051}
1996/06/03 New O-Ring Seal Improves Engine Initial Combustion Gas Sealing{1290}
1996/06/03 Improved Governor Servo Components Available For Use With Energize To Run Solenoids; Energize To Run Solenoid Stop Bolt Adjustment Procedure{1264,1259}
1996/06/03 U-Cup Rod Seals Available For Hydraulic Cylinders Used In Cold Temperatures{5102,5104}
1996/06/03 Long Life Coolant Antifreeze (LLCA) Used In Cooling System{1395}
1996/06/03 Field Repair For Cracked Upper Strut Mount Plate{7051}
1996/06/03 Additional Transmission Clutch Piston Return Springs Have Been Added To Improve Service Life In Off-Highway Trucks{3150}
1996/06/03 Latches May Not Secure Radiator Guard Properly, Without Correct Panel Position{7155}
1996/05/20 Hydraulic Tank Breather Location Change Affects Tank Filling Procedure{5056}
1996/05/20 New Assembly Procedure For Hoist Pump Groups With Double Shaft Seals And Weep Hole{5073}
1996/05/13 New Components In Engine Camshaft Groups Provide Increased Lubrication To Thrust Washer Assembly {1210}
1996/06/10 New Hose Assembly Now Used In Oil Cooler Lines Group For Easier Orientation During Installation {4257}
1996/06/10 New And Modified Hoist Cylinder Valves And Plates Available To Soften Landing Of Body {5102}
1996/06/10 Special Instruction SEHS9965 Available For Installation Procedure For 129-0899 Bearings Located In Rear Suspension Group {7212,7551}
1996/06/10 Special Instruction SEHS9966 Available For Field Installation For Remanufactured Wheel Arrangement And Axle Housing Assembly {3260}
1996/06/10 New Ring Seal Material Used In Brake Groups For Improved Service Life {7555,4251}
1996/06/10 Special Instruction SEHS8433 Available For Repair Of Wheel And Track Loader Lift Arms And Levers {6107,6119}
1996/06/10 Adjustment Screw With Better Fit Available For Pump Pressure Compensator Valve Groups {5086}
1996/06/10 New U-Cup Seal And Spacer(s) Replace Cylinder Rod Packing Seal {5101,5102,5103,5104,5213,5223,5229,5265}
1996/06/10 Stainless Steel Sleeve Assemblies Used In Exhaust Ports {1059}
1996/06/10 Incorrect Full Torque Setting Values Displayed On Engine Information Tags {1901}
1996/06/17 Special Instruction SEHS9948 Available For Rear Axle Lubrication And Filtration Retrofit For 793 And 793B Off-Highway Trucks{3278,3013}
1996/06/17 New Final Assembly Tightening Procedure For Retainer Plate Bolts{4215}