1992/03/09 Caterpillar

New Hose In Turbocharger Oil Lines Group Resists Deterioration Caused By Heat {1307}

Usage:

Challenger 75 Tractors;
3176 Truck Engines

Description of Change: A drain hose in the turbocharger oil lines group has been improved. Formerly, the hot oil flowing through the drain hose could cause the hose to become hard. This could result in an oil leak. The new drain hose is made from material that resists deterioration caused by high temperatures. The new drain hose will provide increased service life. New heavy duty clamps are required with the new drain hose.

Location of drain hose (1) and clamps (2) in the 7C1759 Turbocharger Oil Lines Group.

Adaptable To: The new and former components are identified in the chart and illustration. The new components are adaptable to all 3176 Truck Engines and the engines in Challenger 75 Tractors.

Field Repair

The 7C4425 Drain Hose can be replaced with a piece of 9X2358 Hose (bulk) that is 80.0 mm (3.15 in) long. Install the 9X2358 Hose with two 5P2230 Heavy Duty Clamps. Tighten the clamp screws to a torque of 12 ± 1 N·m (9 ± 1 lb ft).

Caterpillar Information System:

1992/03/02 Fuse Blocks Have Been Improved And Are Now Serviced{4450}

1992/03/02 New Combustion Seal (O-Ring Seal) Used In Unit Injection Pump Group{1290}

1992/03/02 Procedure To Repair Oil Leak At Rear Camshaft Cover{1221}

1992/02/24 Be Sure To Use Correct Connector/Connectors Between Fuel Transfer Pump Outlet And Tube To Fuel Filter{1274,1256}

1992/02/24 1P8116 O-Ring Seal Available To Service Unit Injectors{1290}

1992/02/17 New Fuel Line Assemblies And Adapter Assembly Used{1252}

1992/02/17 New Cylinder Head Gasket Used{1124,1100,1101}

1992/02/17 New 100 Amp Alternators Available For Applications With Large Electrical Requirements{1405}

1992/02/10 Light Green Gasket Material On Secondary Air Filter Elements May Stick To Filter Housing{1054,1051}

1992/02/10 The Letter "I" Now Used In Part Numbers{0374}

1992/02/03 Many Commercial Folded Core Radiators Can Be Converted To Multiple Row Module Radiators{1353}

1992/02/03 New Oil Filler Tube Assembly Helps Prevent Cracking{1316}

1992/03/23 Unit Injector Test Specifications Have Been Updated {0374,1290}

1992/03/23 Troubleshooting Electrical Noise Problems {1900}

1992/03/23 New Electronic Control Groups (Rack Position Sensor And Timing Position Sensor) Provide Increased Reliability {1905,1911}

1992/03/23 Turbocharger Bearings Available For Garrett (Formerly AiResearch) Turbochargers Changed {1053}

1992/03/23 Rotor Shaft Length Changed {4457,4472}

1992/03/23 New Utility Voltage Pickup And Dropout Adjustment Range For Contactor Type Automatic Transfer Switches {4450}

1992/04/06 Procedure For Putting 9U5839 Liquid Gasket Material On Cylinder Liner {1216}

1992/04/06 9U5839 Liquid Gasket Material Available For Use With Aluminum {0649,0648}

1992/04/06 Engine Oil Recommendations Have Been Changed {0374,1300}

1992/04/06 New Caterpillar Engine Oil Nomenclature {0374,0645,1300}

1992/04/06 New PRELUB Systems Available For Medium To Large Caterpillar Construction Equipment {1319}

1992/04/06 New And Improved Operation And Maintenance Manuals Available {0374}