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 Service Life Of OEM Primary Fuel Filters{1250,1260}

1985/12/09 A Water Separator Can Help Prevent Fuel Injector Damage If Fuel Is Contaminated With Water{1263,1250,1273}

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

1985/11/25 Oil Pressure Shutdown Specifications Change For Hydramechanical Shutoff System{1085}

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

1985/11/25 Output Shaft Group Improved{3305}

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

1985/11/25 Faster Response Water Temperature Regulators; Service Simplified{1350,1355}

1985/11/18 Filter Added To Drain Hole In Water Pumps{1361}

1985/11/18 Remanufactured Crankshafts Are Available In Standard And Two Undersize Dimensions (U.S. and Canada){1202,7754}

1985/12/16 Later 3406B And 3408B Truck Engines Have Higher Minimum Coolant Temperatures{1350,1355}

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 Improved Clutch Disc And Cooling Oil Flow{3300,3302,3303,3306}

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 Bracket Added To The Watercooled Exhaust Manifold Group To Help Support Turbocharger{1059}

1986/01/13 New Vee Belt Set Used In Fan Drive Group{1357,1359}

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

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