1981/03/16 Caterpillar

New Shield Assemblies Used In Water Shielded Manifold Group{1067}

Usage:

D379 ( 68B ),
D398 ( 66B ) And D399 ( 35B ) Industrial Engines

Description of Change: New shield assemblies are used in the water shielded manifold group on D379, D398 and D399 Industrial Engines. The inner shield assemblies have a thicker end plate and a larger boss to make them stronger. The new parts will give a reduction in stress and prevent cracks in the area around the boss. See the illustration.

The new outer shield assemblies have plugs (spacers) welded between the plates on the inside of the water passage. The plugs hold the plates together and prevent distortion of the plates if there is too much water pressure. Formerly, it was possible for distortion of the plates to cause weld failures and leaks.

Adaptable To: The new shield assemblies are a direct replacement for the former parts.

Location of parts.

Caterpillar Information System:

1981/03/16 New Inlet And Exhaust Valves And Valve Guides Have Tighter Fit To Prevent Corrosion And Guide Wear{1104,1105,1101,1103,1108,1109}

1981/03/16 5P1075 And 5P1076 Washers Have A Different Design{7553,0680}

1981/03/16 Approximate Liquid (Refill) Capacities Added To Specifications Page In Parts Book{0374}

1981/03/09 Clean Electrical Contacts In Exhaust Gas Recirculation (E.G.R.) Switch Group And Cover Assembly Before Installation{1080}

1981/03/09 New Aftercooler Core has Improved Design To Prevent Vibration Damage Which Lets Coolant Into Engine Air Inlet{1064}

1981/03/09 Correct Installation Of Inserts Necessary During Repairs To Prevent More Counterbore Cracks{1217,1201}

1981/03/09 Special Studs And Nuts Available For Exhaust Manifolds On Engines Used In Heavy Load Conditions{1059,1101}

1981/03/09 Test Procedure For Exciter Reactors On SRSE Generators{4454}

1981/03/09 New Poppet Valves And Piston Available As Replacement Parts; Automatic Center Punch Can Be Used To Install Piston{3012,0622,0626,3166,3185}

1981/03/09 Correct Preparation Is Important To Prevent Damage During Extended Periods Of Storage{7500}

1981/03/02 Check Oil Level Carefully To Prevent Operation With Too Much Oil In Engine Crankcase{1316}

1981/03/02 Modification Of Flywheel Prevents Loose Clutch Pilot Bearing{1155,1156}

1981/03/23 6V2029 Fixture Group Available For Adjustment Of Air/Fuel Ratio Control {0626,1278,0652}

1981/03/23 6V4009 Dowel Driver Available {0622,1101}

1981/03/23 Fuel Pressure Relief Valve Is Shown Inverted (Wrong End Up) In Parts Book Illustrations {1253,1286}

1981/03/23 Longer Cable Assembly Now Used In The 9S2000 Flowmeter {0651}

1981/03/23 Correction To Torque Specification For Locknuts On Valve Clearance Adjustment Screws Of Engines Equipped With Jacobs Engine Brakes {1119,1102}

1981/03/23 New Tool Makes Glow Plug Wire Removal Easier {0622,0621,1403}

1981/03/30 Check All Settings When Fuel Injection Pump Group Is Installed{1286,1264,1251,1253}

1981/03/30 Low Engine Temperatures: Install Check Valve{1353,1355,1370,1380}

1981/03/30 6V3197 Spacer, 6V3041 Tool Group Available For Use During Removal and Installation Of Piston Pin Bearings{0622,1219,1218,1214}

1981/03/30 6V3150 Engine Pressure Group Gives Direct Indication Of Manifold Pressure{0651,1058}

1981/03/30 Electrical Information For EGR (Exhaust Gas Recirculation) Systems On 3208 Truck Engines So Equipped{1080}

1981/03/30 Brass Plug Now Used Instead Of Steel Plug In Sea Water Aftercooler{1063}