New Top Piston Ring Has Plasma-Coated Face {1215}
Usage:
D8K Tractors and 583K Pipelayers
Description of Change: A new top piston ring is used in the engines for D8K Tractors and 583K Pipelayers. The new piston ring has a plasma-coated face for better resistance to wear and corrosion than the former chromeplated piston ring. The gap of the new ring is 0.0355" (0.902 mm), in comparison to the 0.0310" (0.775 mm) gap for the former ring to prevent contact of the ring ends. Also, the new ring is made of a harder material to decrease wear and possible failures from breaks.
Adaptable As: The new 8N5654 Piston Ring is a direct replacement for the former 6N5025 Piston Ring which is canceled.
Caterpillar Information System:
1979/10/29 New--3208 Engine Maintenance Tips Wall Chart {0374,1000}
1979/10/22 Different Thrust Bearing And Thrust Rings Now Used In Turbochargers{1052,1053}
1979/10/22 New Shaft Used In Fan Drive Group{1359}
1979/10/22 Steel Shims Are Now Used To Adjust The Preload On The Front Wheel Bearings{4208,4200}
1979/10/22 Voltage Regulator Can Cause Variable Ammeter Indications{1410,1401,1405,1406,7467}
1979/10/22 New Connecting Rod Is Tapered In Piston Pin Area{1218}
1979/10/22 New Valve Rotator And New Oil Shield Are Available{1104,1105,1109}
1979/10/22 Size Of Glass Beads Is Important When Used To Clean Engine And Turbocharger Parts{0670,1052,1053,1077,1105,1214}
1979/10/22 More Studs Used To Hold Transmission To Bevel Gear Case{3064,3150,4059}
1979/10/22 Cold Temperature Starting Procedures For Air Compressor And Drill Engines{0374,1000,1450}
1979/10/22 New Coolant Temperature Regulator Housing And Vent Line Valve Give Better Control Of Engine Cooling; Conversion Kits Available{1380,1355}
1979/10/22 Bracket Modification Makes Oil Filter Changes On Transmissions Easier{3179}
1979/10/29 Use The 6V2034 Micrometer Adapter To Measure Lip Thickness Of Engine Valves {0653,1105}
1979/10/29 New Repair Kit Is Available For Service Of Hydraulic Jack {0642}
1979/11/05 Correct Installation Of Track Shoe Nuts{4170,4179}
1979/11/05 Two Plug Assemblies (Booster Cables) Are Available To Start Machines{1401,1453}
1979/11/05 Wider Connecting Rods Have More Bearing Area{1214,1218}
1979/11/12 Puller Studs Of Same Size Can Have Different Work Capacities{0621}
1979/11/12 New Air Cleaner Group Keeps Rain Out Of Cleaner{1051,1054}
1979/11/26 More Potting Material Now Used In 6N5906 Electric Service Meter{7480}
1979/11/26 Batteries Can Be Damaged If Too Much Vacuum Is Used During Electrolyte Fill{1401}
1979/11/26 New Cylinder Block Has More Material Around Liner Seat Area{1201}
1979/11/26 Former Oil Pump Group Is Now Used Again{1304}
1979/11/26 Fabricated Tester For Regulator-Exciter Control Assemblies Used On SR-4 And SRCR Generators{0652,4451,4452,4454,4467}