1979/06/04 Caterpillar

New "L-Shaped" Clutch Plates Now Used{3302}

Usage:

MG514 Marine Transmission;
5N4426 (Ratio 4.5:1) and 5N4427 (Ratio 6:1) Marine Gear Groups

Description of Change: New "L-shaped" clutch plates are used in the MG514 Marine Transmissions 5N4426 (ratio 4.5:1) and 5N4427 (ratio 6:1) Marine Gear Groups. The new clutch plate has a wider spline tooth than the former plate to give more contract area with the spline teeth on the shaft. The narrower teeth on the former clutch plate can cause notches to wear into the spline teeth on the shaft.

Adaptable As: Direct replacement.

Clutch plates must be assembled in the clutch as shown.

INSTALLATION: The new clutch plates must be assembled in the clutch as shown in the illustration. Note that the area where material has been added must be toward the engine.

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NOTICE

Do not use the new clutch plates on a shaft with badly notched spline teeth. A shaft with notches will cause notches on the new clutch plates and the clutch will not release.

Caterpillar Information System:

1979/05/28 Correct Locations To Connect Gauges For Checks Of Engine Oil Temperature And/Or Pressure{7455,7450,1300}

1979/05/28 New Type Products Available To Clean Cooling Systems{1350}

1979/05/28 Seat Belt Maintenance{7327}

1979/05/28 A New Method To Clean And Polish Engine Valve Stems{0674,1105}

1979/05/28 9S8100 Tool Group Changed To Use With Fuel Transfer Pump Only{0622}

1979/05/21 Rod Bearings For Parts Service Have Reliefs (Grooves) Cut On The Outside Diameter{1219}

1979/05/21 New Washers For Injection Valve Nozzles Must Be Added To Valve Grinding Gasket Kit When Used With Later Engines{7555,1254}

1979/05/21 How To Prevent Cylinder Block Failure From Cracks{1201}

1979/05/21 Do Not Use Later 9N3979 Nozzle Assemblies In Plate Of Earlier Nozzle Assemblies{1254}

1979/05/21 New Flywheel Housing Corrects Clearance Problem With Cylinder Block{1157,1158,1201,1453}

1979/05/21 Shorter Mounting Bolts Used For Glow Plug Wiring{1403,1412}

1979/05/14 Two Fuel Pressure Pumps Are Available To Increase Fuel Pressure{1250,1295}

1979/06/04 New Caterpillar Yellow Paint{0670}

1979/06/04 Check Crankshaft Seals During Installation Of Engine Overhaul Gasket Kits; Add A Wear Sleeve When Needed{7555,7558,1161}

1979/06/04 New Centering Rings For Oversized Main Bearings{0665,1230}

1979/06/11 New Specification For Installation Of Camshaft Front Bearing In Cylinder Block{1211}

1979/06/11 Test Specifications Now Available For 9N3979 And 9N2366 Pencil Type Fuel Nozzle Assemblies{0652,1254}

1979/06/18 Temperature Compensator Conversion Group Available For Fuel System To Prevent Low Power Output{1250}

1979/06/18 During Installation Of An Auxiliary Bypass Oil Filter, Be Sure Passage In Oil Cooler Fitting Is Open{1314,1378}

1979/06/18 Shorter Bolt Used In BrakeSaver Manifold To Prevent Possible Contact With Bolt In Transmission{1155,1013}

1979/06/25 6V117 And 6V2001 Bushings Used In 9S8140 Pressurizing Pump Group Are Available For Parts Service{0651}

1979/06/25 Use Of 9S3265 Retaining Compound On Schwitzer Turbocharger Compressor Wheel Retainer Nuts{1052,1053}

1979/06/25 6V183 Gasket Now Available For Parts Service To Use On 5P4150 Or 8S2242 Nozzle Tester{0651}

1979/06/25 New Water Pump Assemblies Use An Improved Seal Assembly{1361}