1978/01/09 Caterpillar

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

Usage:

D379, D398, D399 Engines

In applications where the Caterpillar coupling is used, it is possible to remove the connection to the inner member of the coupling and then operate the engine. For example, this can be done to operate one of a pair of tandem engines or to test an engine with a load. If the connection is removed, the inner member of the coupling must be restrained (held in position).

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If the inner member of the coupling is not restrained during engine operation, the result can be excessive vibration and damage to the coupling. It is also possible that the inner member of the coupling can be thrown out of the coupling and cause damage to equipment or injury to people in the work area.

For the 3N5609, 3N5577, 5N3764 and 5N3765 Coupling Groups either restrain the inner member of the coupling by the installation of a 5N3171 Plate Assembly, or remove the inner member of the coupling and the rubber boots. For other Caterpillar coupling groups, remove the inner member of coupling and the rubber boots.

Caterpillar Information System:

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

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

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 Water Pump Group Now Used{1361}

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

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

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

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

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

1987/12/14 Earlier Flywheel Housings Can Be Modified For Use With Later Crankshafts{1157,1202}

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

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

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}

1978/01/16 Tolerance Added To Valve Clearance Specifications{1105,0374}

1978/01/16 New Turbine Housings Are The Replacement For Three Former Turbine Housings Used On Schwitzer Turbochargers{1052}

1978/01/16 Turbine Housing For Turbocharger Is Stronger{1052}

1978/01/16 Improved Gasket Prevents Oil Leakage From The Governor{1264}

1978/01/23 Design Of Governor Control Linkage Changed; Less Force Is Needed To Move The Accelerator Pedal{1265,1269}

1978/01/23 Change In Design Of Engine Governor, Fuel Injection And Transfer Pump Groups, And Fuel Ratio Control Groups{1264,1278,1286}

1978/01/30 Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures{1105,1208}

1978/01/30 Oil Strainer (Screen) Added To Turbocharger Thrust Bearing{1052,1053}

1978/01/30 New Water Pump Cover Has A Baffle And Wall To Send Coolant Flow From Bypass Line Directly Into Water Pump{1361}

1978/01/30 Stronger Front Support Assembly{1153}