1994/10/03 Caterpillar

New Flexible Exhaust Assembly Has Longer Service Life{1061}

Usage:

D25C (9YC),
D25D (1HK),
D30C (7ZC),
D30D (3AJ),
D35C (2GD),
D35HP (3FD),
D350C (8XC),
D350D (9RF),
D40D (2JJ),
D400 (1MD),
D400D (8TF) Articulated Trucks

Description of Change: New flexible exhaust pipe assemblies are used to provide longer service life for the exhaust system.

Adaptable To: The new 1010153 Exhaust (Flexible) Pipe Assembly replaces the former 6U0103 Exhaust Pipe Assembly on the D40D, D400D, D35HP and D400. The new 1010155 Exhaust (Flexible) Pipe Assembly replaces the former 5U9971 and 7U7360 Exhaust Pipe Assemblies on all other models.

The new assemblies are effective with the following machines, refer to chart A.

The new 1010153 and 1010155 Exhaust (Flexible) Pipe Assembly are adaptable to earlier models. Use the following illustration to locate the new exhaust pipe assembly.

Exhaust Pipe Assembly Location.

Caterpillar Information System:

1994/10/03 New Flexible Lines Used In Aftercooler Water Lines Group{1380,1063}

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}

1994/10/03 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}

1994/10/10 New Driveline Yokes Have Improved Sealing And Seal Protection{3253,3250}