1981/03/09 Caterpillar

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

Usage:

3304, 3306 Industrial and Vehicular Engines;
3306 Truck Engines

Special high-temperature taperlock studs and stainless steel nuts are available for the exhaust manifolds on 3304 and 3306 Engines used in heavy load conditions where manifold temperatures are very high. These high-temperature conditions can cause erosion (gradual removal) of the standard stud material, which makes the studs weaker. After a period of time, this can cause broken studs. The special high-temperature studs and stainless steel nuts will give longer service life on engines operated under these conditions.

The chart shows a list of the special and standard taperlock studs, and the length of each stud. Each of the special studs can be used as a direct replacement for the respective standard stud. With the special high-temperature studs, use the new 2N2766 Locknuts (stainless steel) in place of the standard 1B5355 Nuts.

Caterpillar Information System:

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}

1981/03/02 Two New Exhaust Manifolds Available For Replacement Of Single Rear Manifold To Prevent Broken Studs{1059}

1981/03/02 High Concentration Of Aluminum In Oil Analysis Can Be The Result Of Rocker Arm Support Wear{1318,1102}

1981/03/02 Changes Have Been Made To Some Caterpillar Service Publications{0375}

1981/02/23 Changes Made To Power Cord Plugs On 5P6532 And 5P6533 Reader Projectors{0160}

1981/02/23 Pipe Plug Added To Rear Of Cylinder Block Prevents Oil Leakage Into Flywheel Housing{1201}

1981/02/23 6V4163 Bit And 6V4164 Driver Now Available For Removal Of Bolts For Flyweight Carrier{0612,1264}

1981/02/23 Do Not Adjust The Fuel Setting Or High Idle Higher Than Necessary{1257}

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

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

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

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

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

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

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}