1987/12/14 Caterpillar

Earlier Flywheel Housings Can Be Modified For Use With Later Crankshafts{1157,1202}

Usage:

3408, 3408B Engines In All Applications

For sometime, new crankshafts with thicker cheeks have been used in 3408B Engines in all applications to give longer crankshaft life. A new flywheel housing with a cast-in pocket is used on these engines because of the thicker end cheek on the new crankshaft. Although the former crankshaft and housing are both serviced, there are situations where it is desirable to reuse the former housing with the later crankshaft, such as on a replacement engine or short block.

A relief can be machined in the former flywheel housing so the later crankshaft with the thicker end cheek can be used with this housing. This provides clearance for the end cheek. See illustration.

Machining of the former flywheel housing is indicated by the shaded area.

Caterpillar Information System:

1987/12/14 New 1U5803 Connector Repair Kit Available{0785,0782}

1987/12/14 Improved Valve Mechanism Cover Groups{1107}

1987/12/14 Cooling System Troubleshooting Procedures For Generator Sets Equipped With Folded Core Radiators{1350}

1987/12/14 New Gaskets Used In Valve Mechanism Cover Group{1107,1120}

1987/12/14 New Linings Available For Flywheel Clutch Brake Shoe Assemblies{3058}

1987/11/30 Improved Starter Solenoid Prevents Contact Corrosion {1453}

1987/11/30 Engine Oil Refill Capacity Reduced {1318,1326}

1987/11/30 Oil Pan Size Identification {1302}

1987/11/30 The 8T5200 Signal Generator/Counter Group And Its Uses {0783,3000,3012}

1987/11/30 Two New Vacuum Pumps Available For Servicing Air Conditioning Systems {1802,7320}

1987/11/30 New Caterpillar Excavator Service Reporting Codes Booklet For SIMS And Service Claims Use {0336}

1987/11/23 Improvements To Prevent Oil Leakage At Cylinder Heads{1100,1221}

1987/12/21 Improved VR3 Voltage Regulator Available For Earlier Generators{4474}

1987/12/21 Check Screen Assembly In Fuel Transfer Pump Inlet If Low Fuel Pressure Is Experienced{1256}

1987/12/21 New Suction Bell Assemblies, Bolts, And Washers Used In Sump Oil Lines Groups{1307,1315,1304}

1987/12/21 New Gerotor Pump Group Used In 3161 Governors{1264}

1987/12/21 New or Updated Drive Train Information Available In Guidelines For Reusable Parts{0374}

1978/01/09 Improved Water Pump Group Now Used{1361}

1978/01/09 Service Tip: Use Caution When Hydraulically Operated Implements Must Be Lifted With A Hoist While The Engine Is Stopped{5050}

1978/01/09 Improved Seal Used Between Impeller And Bearings On Water Pump Shaft{1361,1371}

1978/01/09 5P8665 Cylinder Liner Puller Makes Liner Removal Easier And Faster{0621,1216}

1978/01/09 Inner Member Of Caterpillar Coupling Must Be Restrained If The Connection To The Inner Member Is Removed{3252}

1978/01/09 Improved Water Shield For Exhaust Manifold{1067}

1978/01/16 Improved Front Pulley And Damper Groups Use New Damper Adapter With Larger Diameter Bolt Circle For Pulley Bolts{1205}