1994/12/05 Caterpillar

Flexible Hose Assembly Replaces Tube Assemblies In Turbocharger Water Lines Groups{1380}

Usage:

D11N (4HK, 74Z) Track-Type Tractors;
776B (6JC),
776C (2TK),
784B (5RK) Tractors;
777B (4YC),
777C (4XJ),
785 (8GB),
785B (6HK),
789 (9ZC),
789B (7EK) Trucks;
994 (9YF) Wheel Loaders;
5130 (7TJ),
5230 (7LL) Excavators

Description of Change: A new flexible hose assembly is used to replace a tube in the turbocharger water lines groups on the above machines. The new hose assembly is less susceptible to damage resulting from vibrations. Some other components in the groups are changed to allow the use of the new flexible hose assembly.

Adaptable To: Chart A and Illustration 1 identify the new components in the 1W-0720 Turbocharger Water Lines Group. The 1W-0720 Turbocharger Water Lines Group is used on 3508 and 3512 Machine Engines. Chart B and Illustration 2 identify the new components in the 2W-3707 Turbocharger Water Lines Group. 2W-3707 Turbocharger Water Lines Group is used on 3516 Machine Engines. Chart C identifies the effectivity of the new components in the machine engines in the above machines. When all of the new components are used together, the components are adaptable to earlier machine engines.

Illustration 1. Location of new components in 1W-0720 Turbocharger Water Lines Group.

Illustration 2. Location of new components in 2W-3707 Turbocharger Water Lines Group.

Caterpillar Information System:

1994/12/05 Hardened Spacers Used In Steer Pivot{4300,7051,7066}

1994/12/05 New Muffler Bracket Improves Muffler Support{1062}

1994/12/05 New Differential Group Housing Used In The Output Gear Group{3159}

1994/11/28 Be Sure Correct Piston Cooling Jets Are Installed{1331}

1994/11/28 Improved Spring Used In Belt Tightener Groups{1358}

1994/11/28 Screened Filter For Implement Motor Case Drain Return Line{5720,4351,4921}

1994/11/28 New Front Axle Shims Make Adjustment Easier{3250}

1994/11/28 Radiator Mounting Bolt Damage{1353}

1994/11/28 Fixture Can Be Used To Simplify Challenger Radiator Support Installation.{1353}

1994/11/21 3054 And 3056 Machine Engine Fuel Injection Pump Service{1251}

1994/11/21 New Speed/Timing Sensor Provides Parts Commonality For Electronic Unit Injector (EUI) Engines{1907}

1994/11/21 Wheel Bearing Check And Adjustment Maintenance Interval {4208}

1994/12/05 Dry Start Priming Procedure for 3500 Machine Engines with Electronic Unit Injection (EUI){1250,1258}

1994/12/12 Procedure For Measuring Oscillating Hitch Wear {7113,7114}

1994/12/12 Procedure To Bleed And Charge The Rear Suspension{7213}

1994/12/12 Caterpillar Hose Press And Tool Usage{5057,0684}

1994/12/12 Injector Solenoids on Engines Equipped with EUI Are Not Polarity Sensitive{1259}

1994/12/12 Serviceable Parts For Custom Option Engine Prelube Group{1319}

1994/12/12 New Exhaust Bypass Valve (Wastegate) Used In Exhaust Bypass Group{1057}

1994/12/12 New Cylinder Blocks Made From Stronger Alloy{1201}

1994/12/19 New Roller Bearings Used In The 8E-9034 Transmission Planetary Group To Improve Service Life {3160}

1994/12/19 Small Cracks Around The Holes In The Front Wheels Can Be Repaired By Welding {4201}

1994/12/19 New Screen Assembly Prevents Large Debris From Transferring Into Differential Compartment {4051,3258}

1994/12/19 Primary Pressure For The Transmission Pressure Control Group Has Been Increased {0374,3150}