1987/12/14 Caterpillar

Improved Valve Mechanism Cover Groups{1107}

Usage:

3400 Family Of Engines

Description of Change: Improved valve mechanism cover groups are used on the 3400B Family of Engines. New valve covers, adapters and plugs are used in the groups to prevent oil leakage.

New adapters are used for assembly of breathers, oil filler tubes and filler caps on the valve covers. New plugs are also used to cover the unused holes in the valve covers. The new adapters and plugs have an O-ring groove at the end of the press fit diameter. The bores for the adapters and plugs in the valve covers have been increased in length because of the increased adapter and plug engagement lengths.

Adaptable To: The changes to the valve mechanism cover groups are listed in the chart. The new parts are adaptable to all earlier engines in the 3400 Family. The new plugs and adapters must be used together. To install the new adapters, the temperature of the adapters must be - 18°C (0°F) or lower before they are pressed into the valve cover.

Caterpillar Information System:

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}

1987/11/23 Improved Mounting Hardware For Electronic Control Group{1250,1259}

1987/11/23 Ring Retainer And New O-Ring Seal Used In The BrakeSaver Engine Oil Lines Group{1159}

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

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

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}