New Piston Ring Group Used
Usage:
All 4.75"
Bore Truck Engines With 7S9404 Piston Ring Group (Rectangular)
Description of Change: A new piston ring group is used on the above engines. The new group has a new top piston ring.
This new top piston ring is made of a new material which has more resistance to wear and will give a longer service life.
Adaptable As: The new piston ring group is a direct replacement for the former piston ring group as shown in the chart.
Caterpillar Information System:
1983/06/29 Damaged Lifter Bores In 3400 Series Engines Can Be Used Again
1983/06/29 6V7100 Combustible Gas Leak Detector And 6V7103 Calibration Kit Available
1983/06/29 Remanufactured Alternators And Starting Motors Are Available
1983/06/29 List Of Service Publications
1983/06/29 6V6142 And 6V6143 Installers Must Be Used To Install Crankshaft Seals And Wear Sleeves
1983/06/29 Consist Lists Now Available For Conversion Of Direct Injection 3406 Truck Engines To Higher Horsepower Arrangements
1983/06/29 Use The 6V4930 Battery Load Tester To Test Batteries
1983/06/29 New Service Tools Available
1983/05/18 New Turbocharger Has Thicker Mounting Flange To Prevent Breakage
1983/05/18 Use 6V7777 Spacer With 9S6030 Front Oil Seal Installer
1983/05/18 New Special Instruction Available For 6V4135 Halogen Leak Detector
1983/05/18 Procedure To Clean Oil Passages In Crankshafts And Cylinder Blocks
1983/06/29 Pistons With Thicker Top Rings Must Be Used In Correct Applications
1983/06/29 Change 6V3060 Egr Testers To Les Testers
1983/06/29 New Camshaft Gear Has More Resistance To Pitting
1983/06/29 New Reconditioning Specifications For Cylinders Decrease Piston Scuffing And Seizure
1983/08/31 New Filter Orifice Helps Prevent Governor Surge
1983/08/31 New Fuel Ratio Control Group Has Improved Diaphragm
1983/08/31 List Of Service Publications
1983/08/31 New Liner Seat Insert Available
1983/08/31 New Procedure And New Tool Can Be Used To Remove Cylinder Sleeves From The Cylinder Block
1983/08/31 New Governor Drive Gears And Weight Assemblies
1983/08/31 New 6V7070 And 6V7800 Digital Multimeters Available
1983/08/31 Use A Pipe Plug For Repairs of Small Holes In Castings