New Aftercooler Core has Improved Design To Prevent Vibration Damage Which Lets Coolant Into Engine Air Inlet{1064}
Usage:
3412 Industrial And Marine Engines
Description of Change: A new core assembly is used in aftercooler groups for 3412 Industrial and Marine Engines. The new core has an improved design to prevent movement of the tubes and fins inside the assembly. Formerly, normal vibration during engine operation caused enough movement to wear through the two tubes at the bottom corners of the core. The result was leakage of coolant into the engine air inlet, and possible damage to the engine.
Adaptable As: The new 1W2501 Aftercooler Core Assembly is a direct replacement for the former 6N2601 Aftercooler Core Assembly, which is canceled. The new core assembly is in effect on 3412 Industrial Engines 38S7785-Up, and 3412 Marine Engines 60M1443-Up.
Caterpillar Information System:
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}
1981/03/02 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}
1981/03/09 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}
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}