Turbocharger Heat Shields Are Stronger
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:
1977/09/28 Use Viscous (Fluid) Type Crankshaft Vibration Damper In Place Of Rubber Type Damper
1977/09/28 Use Only The Larger Size Inserts To Make A Repair To Cylinder Block Counterbores For Cylinder Liners
1977/09/28 Stronger Piston Is Used; Piston And Connecting Rod Are Tapered In Area Of Piston Pin
1977/09/28 Do Not Use Plastic Tubing With Brass Couplings As A Fuel Supply Line
1977/09/28 Changes To The Injection Pump And The Fuel Setting
1977/09/28 Stronger Fan Drive Pulley Prevents Cracks During Assembly; Torque On Pulley Bolts Changed
1977/09/07 List Of Service Publications
1977/09/07 Check For Extra Holes In Crankshaft Flange If Oil Leaks From Between The Flywheel And Crankshaft Flange
1977/09/07 New Tube Assemblies For Turbocharger Oil Lines; New Base Assemblies For Oil Filters
1977/09/07 Engine Valve Springs Are Now Made Of Stronger Steel
1977/09/07 New Clutch Groups Used In Front Power Take-Offs; Service Kits Available
1977/09/07 Installation Procedure For Crankshaft Wear Sleeves Changed
1977/10/12 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
1977/10/12 If The Fuel Setting Dimension Is More Than 7.00 MM, Remove The End Play Of The Camshaft To Make The Fuel Setting
1977/10/12 New Front Housing Has Stronger Boss For Alternator
1977/10/12 Improved Main, Thrust And Connecting Rod Bearings Have Aluminum Alloy With More Strength
1977/10/12 Improved Oversize And Undersize Connecting Rod And Main Bearings With Higher Strength Aluminum Alloy
1977/10/12 Washer Removed From Variable Timing Unit
1977/10/12 List Of Service Publications
1977/10/12 Fuel Transfer Pump Shaft With Chromium Plate
1977/10/12 Be Sure To Drain Oil From The BrakeSaver At Every Lubricating Oil Change Period
1977/10/26 Fabricated Extension Prevents Fuel "Splash" During Injection Valve Testing
1977/10/26 Preparation Of Truck Engines For Cold Weather Operation
1977/10/26 Replacement Bearings Have Aluminum Alloy With More Strength