1997/10/27 Caterpillar

Improved Duo-Cone Seal Group Increases Service Life{4201,4050}

Usage:

143H (1AL),
163H (5AK) Motor Graders

Reference: Service Manual Module, SENR8554; Disassembly & Assembly, 143H & 163H Motor Graders Machine Systems; Page 4, "Conventional Duo-Cone Seals"; Page 43, "Front Wheel Spindles". This module is part of Service Manual SENR8550.

Description of Change: A new duo-cone seal group in the drive wheel group contains a Nihard metal ring in place of the former cast iron ring. This Nihard ring resists scoring and is more durable.

Adaptable To: The new 145-8032 Duo-Cone Seal Group is a direct replacement for the former 9W-6698 Duo-Cone Seal Group and is effective with 143H (1AL436) and 163H (5AK159) Motor Graders. This change is adaptable to earlier machines. Follow the procedures in the referenced service manual for disassembly and assembly instructions.

Typical drive wheel.
Arrow depicts duo-cone seal group.

Caterpillar Information System:

1997/10/27 Reliability Of Transmission Fluid Level Reading Improved With Addition Of Baffle Plate{3081,3080}

1997/10/27 All "H" Series Motor Graders (Except 24H) Are Now Equipped With 2 Cylinder Air Compressors{1803}

1997/10/27 Stronger Sun Visor Guides Available {7300,7340}

1997/10/27 Improved Steering Column Boot Resists Cracking{4338,7300}

1997/10/20 Service Interval Change For Extended Life Coolant Extender And Extended Life Coolant{1395,7543,7545}

1997/10/20 Improved Sealing On Caterpillar Monitoring System And VIMS Modules Provides Resistance To Lens Fogging{7490,7601}

1997/10/20 Service Repair Procedure For Engine Cowls{7263,7251}

1997/10/20 Correct Retaining Ring Specified For Shaft Seal In Piston Motor Group For Fan Drive{5058}

1997/10/20 New Off-Highway Truck Electronic Control Group (EPTC II) Used{7601,7490,7463}

1997/10/20 New Hose Assembly In Oil Cooler Lines Group Prevents Rubbing{1365,4268,7554}

1997/10/20 New Body Assembly Used In Off-Highway Truck Air Cleaner Group To Improve Air Flow To Pre-Cleaners{1051,1055}

1997/10/20 Special Instruction, REHS0078, "Retrofit Procedure For Air Operated Exhaust Diverter" Is Available{0374,1061}

1997/10/27 New Custom Product Support Literature Is Available For 773D And 775D Trucks Equipped With Wiggins Service Center{0374}

1997/10/27 New Custom Product Support Literature Is Available For 777B Trucks Equipped With Air Quick Disconnect{0374}

1997/10/27 New Custom Product Support Literature Is Available For 776C Tractors And 777C Trucks Equipped With Fuel Tank Extension Group{0374}

1997/10/27 Changes Made To Water Lines Group In Order To Reduce Damage Caused By Vibration{1380}

1997/10/27 New Brake Valve Groups Have Breather Plug In Vent Port For Air Cylinder Group{4265}

1997/10/27 Updated VIMS Configurations Available For 793C Off-Highway Trucks{7601,7407,7417,7470,1924}

1997/10/27 Corrected Boom Chain Information For Operation And Maintenance Manual{6460,6404}

1997/10/27 New Vane Pump Group, Assures Clearance For Drive Gear, And Correct Alignment Of Vane Pump Group With Torque Converter Cover{5055}

1997/10/27 New Troubleshooting Guide Available{0374}

1997/10/27 Significant Improvement For Pump Impellers (Water Pumps){1364}

1997/10/27 History Of Pump Impeller (Water Pump) Changes{1364}

1997/11/03 New Tie Rods And Spindle Assemblies Improve Service Life {4329,3282}