New Aftercooler Core Has Copper-Nickel Tubes For Increased Strength{1063,1064}
Usage:
776, D10 Tractors;
777 Trucks;
D348 Industrial Engines
Description of Change: A new aftercooler core assembly is used in the aftercooler group on D348 Engines with Serial Numbers 57K1287-Up and 98S1755-Up. The new core has copper-nickel tubes in comparison with the former core which had copper tubes. It is stronger to prevent possible cracks at the header plate.
Formerly, stresses were high enough in some conditions to cause failure of the tubes near the header plate. This type of failure permits coolant to leak into the air inlet system.
Adaptable As: The new 5N8208 Core Assembly is a direct replacement for the former 2N7527 Core Assembly, which is canceled. A quantity of two is required per engine.
Caterpillar Information System:
1980/11/17 Some Remanufactured 3406 Engines Have The Wrong Reference Serial Number On The Identification Plate{7557,1000}
1980/11/17 Use Dust Cap To Prevent Freon Leakage From Air Conditioner; Cap Is Available As Replacement Part{7320}
1980/11/17 New Exhaust Manifold Group And Air Lines Group Used To Prevent Exhaust Leakage{1059,1061}
1980/11/17 6V4021 Piston Ring Compressor Group Available{1215,1214,0622}
1980/11/17 Two Thinner Spacers Available For Use During Adjustment Of Off-Engine Timing Dimension{1251,0653}
1980/11/17 Coolant Conditioner Elements Are Now Available For 3208 Engines{1350}
1980/11/17 Check For Correct Spring Retainer On Oil Pump Bypass Valve When Oil Pan Is Removed{1315,1302}
1980/11/10 Wrong Installation Of Washers Between Bearing Cone And Bearing Retainer Nut Can Cause Directional Clutch Damage{3155,3159,3176}
1980/11/10 Different Caps And Adapters For Ball Studs On Circle Drawbars Can Be Used Without Plastic Inserts{6170,6171}
1980/11/10 6V3147 Main Bearing Wrench Now Available{1203,0612}
1980/11/10 Valve Assembly And Nipple Moved From Centershift Lock Control Group To Brake Control Group To Prevent Unauthorized Operation{4282,4267,5220,5221,5223,6151}
1980/11/10 Double-Check Those Dimensions{0374}
1980/11/24 Replacement Wheel Available For Service Of 6V97 Engine Stand Group{0626}
1980/12/01 Direct Inquiry Service Information Retrieval System (SIRS) Available To U.S. And Canadian Dealers{0374}
1980/12/01 Exhaust Manifold And Air Lines Groups Changed To Prevent Exhaust Leakage And Damage To Manifold Gaskets And Mounting Studs{1059,1061}
1980/12/01 Larger Plug Used In The Ends Of The Rocker Arm Shaft Assembly{1102}
1980/12/01 New Service Handle Kit Permits Cab Door To Be Opened From Inside While Locked (Fastened With Lock){7308,7301}
1980/12/01 Check Alignment Of Engine Flywheel And Torque Converter Input Shaft After Flexible Coupling Failures; Also Check Low Idle RPM{3252,1156,3101}
1980/12/01 Warning: Use Correct Seal On Seat Assembly For Valve Group In Steering Valve Group{4307,4312,4322}
1980/12/01 New Front Housing Assembly And Gaskets Used{1162,1166,1151}
1980/12/01 Different Water Temperature Regulators Used In Water Lines Groups{1355}
1980/12/01 Different O-Ring Seal Now Used On The Oil Pump Suction Tube{1307,1304}
1980/12/01 Inspect All Engine Oil And Fuel Filter Elements Before Installation{1000,1261,1318}
1980/12/01 6V4085 Torque Multiplier Group Available{0614}