1985/12/16 Caterpillar

Use Care When Handling Turbocharger Compressor Wheels{1052,1077}

Usage:

All Caterpillar Engines

New turbochargers that are used in production are designed with thinner compressor wheel blades for better efficiency. See Illustration 1. These thinner compressor wheel blades are more susceptible to damage during routine service. There has been a significant increase in reports of this problem on 3406B Truck Engines.

Increased care needs to be given when handling Caterpillar turbochargers during service operations. Damage to the compressor wheel blades can result from light contact with the compressor housing. This contact may occur when rotating the compressor housing to adjust the valves. If the compressor wheel is visibly damaged, the compressor wheel must be replaced. See Illustration 2. When replacing a damaged compressor wheel, check to be sure the turbocharger shaft is straight.

Illustration 1. Turbocharger compressor wheel blades.

Illustration 2. Bent compressor wheel blades.

Caterpillar Information System:

1985/12/16 Troubleshooting Of Jacket Water Heaters{1383}

1985/12/09 New, Tougher Gasket Used Between Block And Front Housing{1151,7555}

1985/12/09 Improved Adjustment Procedure For Blade Rail Wear Strips{6151,6174}

1985/12/09 Use Rotating Torque To Check Final Drive And Wheel Bearing Adjustment{4151,4050}

1985/12/09 New Ratchet Wrenches Available For Tube Fittings{0600}

1985/11/25 Canister Size Of Coolant Conditioner Element Has Changed{1350}

1985/11/25 Improved Bearing Retention In Planetary Group{3150}

1985/11/25 New Duo-Cone Seal Groups Used in Service and Parking Brake Groups{4251,7561}

1985/11/25 Operator Console Group Improved{5200}

1985/11/25 Improvements To Boom And Upper Frame Extends Service Life Of Pin Bores, Pins, And Bearings{6501,7051}

1985/11/25 New Fuel Ratio Control Group Used On Engines Equipped With New Scroll Fuel System{1278}

1985/11/25 New Left Side Mirror And Door Seal Available{7319,7308,7300}

1985/12/16 Gasket Leakage On Aftermarket Fuel Filters{1261}

1985/12/16 Crankshaft Seal Usage On 3400 Series Engines{1160,1161}

1985/12/16 Bushing Kits Available For Crankshaft Pulleys{1205}

1985/12/16 Pressure Gauge Faces With Tonnage Scales Available For Caterpillar Service Tool Manual And Electric Hydraulic Pumps{0615,0616,0799}

1986/01/13 How To Use Temperature And Pressure Probes With Self-Sealing Probe Adapter Groups{0760,0784}

1986/01/13 Fuel Sulfur Analyzer Available{0651,1280,1318}

1986/01/13 Repair Of Speed Sensor Harness On Electronically Controlled Transmissions{3168,3175}

1986/01/13 New Parking Brake Valve And Drain Lines Eliminate Seal Leaks{4282}

1986/01/13 New Muffler Clamp Used To Hold The Muffler To The Exhaust Pipe{1061,1062}

1986/01/13 Round Air Cleaner Inlet Adapter Available{1051}

1986/01/13 Lubricate Clamp When Installing Unit Injector Assemblies{1290}

1986/01/13 Put Grease On Front Crankshaft Seal Before Installing The Crankshaft Pulley And Damper{1160}