1979/10/29 Caterpillar


Improved Seal Now Used In Seawater Pump {1371}

Usage:


D343, D348 and D353 Marine Engines

Description of Change: An improved seal is now used in the seawater pump in D343, D348 and D353 Marine Engines. The spring in the new seal is made of a larger diameter wire than used in the former seal. Also, the metal used in the new spring has more resistance to corrosion than the metal used in the former spring.

Adaptable To: The new 5N6649 Seal is a direct replacement for the former 7L5663 Seal in this application.

Caterpillar Information System:

1979/10/29 7N9843 Fuel Injection Valve Nozzle Assembly Now Used In Truck Engines {1254}
1979/10/29 New Repair Kit Is Available For Service Of Hydraulic Jack {0642}
1979/10/29 Use The 6V2034 Micrometer Adapter To Measure Lip Thickness Of Engine Valves {0653,1105}
1979/10/29 The FT1486 Chain Assembly Can Be Used For Emergency Repair Of Front Power Takeoff Clutches {3055}
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 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 Improved Seal Used In Raw Water Pump On Marine Engines{1371}
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 Cold Temperature Starting Procedures For Air Compressor And Drill Engines{0374,1000,1450}
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 Support Plates Must Be Used To Install Earlier Marine Transmissions{3300}
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 Repair Of Damaged Or Worn Balancer Shaft Bores{1201,0663,1220}
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}
1979/12/10 Improved 6V2012 Micrometer Depth Gauge Set Has Increased Range To Permit Deeper Measurement{0653,5070}
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