1994/10/03 Caterpillar

New Flexible Lines Used In Aftercooler Water Lines Group{1380,1063}

Usage:

793 (3SJ),
793B (1HL) Trucks

Description of Change: New flexible water bleed lines (hose assemblies) are used in the aftercooler water lines group. The former tube assemblies were more susceptible to vibration damage. The new hose assemblies will provide increased service life.

Adaptable To: The new components in the 9Y-8908 Aftercooler Water Lines Group are identified in Illustration 1 and Chart A. The former 4P-1848 and 4P1849 Tube Assemblies are canceled. A new bracket was added to the 9Y-8914 Air Lines Group to provide a place to hold the new flexible lines in place. The new components in the 9Y-8914 Air Lines Group are identified in Illustration 2 and Chart B.

Illustration 1. Location of new components in 9Y-8908 Aftercooler Water Lines Group.

Illustration 2. Location of new components in 9Y-8914 Air Lines Group.

Caterpillar Information System:

1994/09/26 New Gasket Provides Improved Sealing Between Air Compressor And Drive{1803}

1994/09/26 New Gears Reduce Noise And Pipe Plugs Make Installation Easier In Auxiliary Drive Group{1150,1165}

1994/09/26 Exhaust Dust Ejector Operation{1055,1068}

1994/09/26 Arc Suppressors Improve Life of Air Conditioner Thermostatic Switch{7337}

1994/09/26 Engine Maintenance Check Deleted{1100}

1994/09/26 New Hitch Seal And Retaining Ring Used In Rear Frame Groups Reduces Hitch Face Wear{7051}

1994/09/26 Maintenance Guidelines For Exhaust Bypass Group{1057}

1994/09/26 Bolts Are Now Used In The Steering Linkage Group/Torque Specification Has Been Raised{4305}

1994/09/26 Muffler Group and Exhaust Piping Groups Changed To Provide A New Slip-Fit Muffler{1062,1061}

1994/09/26 New Gears Are Available To Reduce Transfer Gear Noise Levels{3159}

1994/09/26 New Spring Retainer Used In Main Hydraulic Control Valves{5051}

1994/09/26 Tensioner Group Pin May Be Difficult To Remove{4197}

1994/10/03 New Flexible Exhaust Assembly Has Longer Service Life{1061}

1994/10/03 Drive Shaft Lubrication Requirements{3253}

1994/10/03 Special Instruction SEHS9803 Is Available For Reinforcing The 7U-1598 (Center) And 7U-1599 (Rear) Frame assemblies To Prevent Cracking{7200}

1994/10/03 New Mounting Hardware for Leveling Blade Arms Improves Retention{6051,6061}

1994/10/03 Fan V-Belt Part Number Has Changed For Certain Models With The 3204 Engine{1357}

1994/10/03 Oversize Fuel Pump Drive Idler Shaft Available To Salvage Cylinder Block{1206}

1994/10/03 New Engine Crankshaft Rubber Damper Assembly Uses Improved Rubber Material{1205}

1994/10/10 New Exhaust Flex Hose Used To Avoid Leaks From System Vibration{1058}

1994/10/10 New Oil Cooler And Hose Improves Routing{1374}

1994/10/10 New Transmission Oil Filter With Improved Seal Area{3164}

1994/10/10 Larger Stick Cylinder Piston Bolts Prevents Loosening{5458}

1994/10/10 Improved Wheel Bearing Cone Anti-Rotation System Prevents Wheel Bearing Cones From Rotating On The Axle Housing{4208,4234}