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:
1980/11/24 New Decals Permit Easier Identification Of Fuel System Settings On Most Truck Engines{7557}
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 Tee-Test Plug And Pressure Tap (Connection) Plugs Can Be Tightened To A Higher Torque To Prevent Leaks{5050,0651}
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}
1980/11/17 Improved Cable Assembly For Mechanical Shut-Off Group{7418}
1980/11/10 6V3147 Main Bearing Wrench Now Available{1203,0612}
1980/11/10 Special Tools Available To Tighten Retainer Nuts For Clutch Drive Hubs Of 7211 And 7221 Marine Transmissions{0612,0626,3302}
1980/11/10 Double-Check Those Dimensions{0374}
1980/11/24 Use Fluid-Type Vibration Damper To Control Vibrations{1205,3305}
1980/11/24 New Gasket Improves Operation Of Shut-Off Groups{7418,7403}
1980/11/24 6V4008 Valve Seat Extractor Now Available{1103,0622}
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 New Front Housing Assembly And Gaskets Used{1162,1166,1151}
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}