Turbocharger Heat Shields Are Stronger{1073}
Usage:
D348 Industrial Engines with Water Cooled Exhaust Manifold;
D348 Marine Engines
Description of Change: New heat shields for the turbocharger are used on the above models. The new heat shields are stronger than the former shields to prevent cracks from vibration. Also, the new shields are easier to assemble than the former shields.
Adaptable To: The new parts are adaptable to earlier D348 Engines when the new parts shown in the chart are used together.
Caterpillar Information System:
1977/10/03 Change Is Made to Support Beam For Front Of Engine{0643}
1977/09/26 New Special Instruction Gives General Information On The Use Of The 5P6590 Wiring Harness Tester For Electrical System Testing{0650,1400}
1977/09/26 Stronger Fan Drive Pulley Prevents Cracks During Assembly; Torque On Pulley Bolts Changed{1359}
1977/09/26 Use Correct Contact Point With Dial Indicator To Be Sure Of The Accuracy Of The Measurements Of Fuel Setting And Fuel Ratio Control Setting On Sleeve Metering Fuel Systems{0653,1250}
1977/09/19 Stronger Piston Is Used; Piston And Connecting Rod Are Tapered In Area Of Piston Pin{1213,1214,1218}
1977/09/19 Use Viscous (Fluid) Type Crankshaft Vibration Damper In Place Of Rubber Type Damper{1205}
1977/09/19 Changes To The Injection Pump And The Fuel Setting{1251,1257}
1977/09/12 New Refrigerant Compressors And Kits With Improved Seals; Conversion Of Earlier Units{7320}
1977/09/12 The Discrepancy Card Has Changed{0374}
1977/09/05 Field Repair Of Cooler Cores Made Of Aluminium{1063,1374,1375}
1977/09/05 Check For Extra Holes In Crankshaft Flange If Oil Leaks From Between The Flywheel And Crankshaft Flange{1156,1202}
1977/09/05 Installation Procedure For Crankshaft Wear Sleeves Changed{1202,1160,1161}
1977/10/03 Washer Removed From Variable Timing Unit{1206,1272}
1977/10/03 Do Not Use Plastic Tubing With Brass Couplings As A Fuel Supply Line{1274}
1977/10/10 Be Sure To Drain Oil From The BrakeSaver At Every Lubricating Oil Change Period{1318,1155}
1977/10/10 Fuel Transfer Pump Shaft With Chromium Plate{1256}
1977/10/10 New Front Housing Has Stronger Boss For Alternator{1151}
1977/10/10 Troubleshooting The Tachometer System Of The 4S6553 Engine Instrument Group{0651}
1977/10/10 Use Only The Larger Size Inserts To Make A Repair To Cylinder Block Counterbores For Cylinder Liners{1201,1216,1217}
1977/10/10 Improved Oversize And Undersize Connecting Rod And Main Bearings With Higher Strength Aluminum Alloy{1203,1219,1230}
1977/10/10 If The Fuel Setting Dimension Is More Than 7.00 MM, Remove The End Play Of The Camshaft To Make The Fuel Setting{1257,1286}
1977/10/17 Fabricated Extension Prevents Fuel "Splash" During Injection Valve Testing{0650,1254}
1977/10/17 Preparation Of Truck Engines For Cold Weather Operation{1300,1000}
1977/10/17 Improved Main, Thrust And Connecting Rod Bearings Have Aluminum Alloy With More Strength{1230}