1983/04/04 Caterpillar

Oil Passage Plugs Are No Longer Installed In Crankshafts For Parts Service{1202}

Usage:

All 3408 And 3412 Engines

A change has been made to the crankshaft assemblies used in the above engines. During assembly of the crankshaft for parts service, the 9F2247 Pipe Plugs will no longer be installed in the oil passages. The plugs will be put in a plastic bag (package), and shipped with the crankshaft. This will make it easier to inspect and, if necessary, clean the oil passages before the crankshaft is installed in the engine. It is very important that the oil passages be carefully inspected and thoroughly cleaned before crankshaft installation to prevent possible engine bearing damage.

NOTE: This change makes it necessary for the serviceman to install the 9F2247 Pipe Plug in the crankshaft.

Information concerning procedures for installation of these oil passage plugs is given in Special Instruction, Form SMHS7936-01 which will be shipped with each crankshaft. Additional information is available in Form SEBD0531, "Engine Bearings And Crankshafts."

The first crankshafts to be released for parts service shipment without the pipe plugs installed are the 7N3407 and 4N7755 Crankshaft Assemblies.

Caterpillar Information System:

1983/04/04 Improved Valve Springs Available{1108}

1983/03/21 8S1603 Socket Group For Use On Bolts With 12 Point Heads{0612}

1983/03/21 New Turbocharger Inlet Tube Assembly And New Seal Available{1059,1061}

1983/03/21 FT1588 Cover Storage Rack{0634}

1983/03/21 New Shutoff Solenoid Group Used{1259}

1983/03/21 Application Of Labels To Plastic Tool Cases{0630}

1983/03/21 New Bolt Used In Front Engine Support{1154}

1983/03/14 Change Made To 6V3032 Deluxe Test Lead Kit{0651}

1983/03/14 Additions To Reference Chart For Major Production Changes{0374,0375,1000}

1983/03/14 "Gas Engine Application And Installation Guide" Now Available{0374}

1983/03/14 Fabricated Bracket Decreases Stress On Refrigerant Compressor Bracket{1405,1802}

1983/03/14 New Manual BrakeSaver Control Group{1159}

1983/04/04 New Gasket Prevents Leakage{1201,1362,1380}

1983/04/04 Labyrinth-Type Seal Ring Available For Rear Power Takeoff{3055}

1983/04/04 New Washer And Bolts Keep Fan Drive Tight{1359}

1983/04/04 Use The 6V5000 Infrared Thermometer Group To Measure Temperatures{0651}

1983/04/04 New Connecting Rod Bearings Used{1219,1230}

1983/04/18 Machine Available To Balance Turbochargers {0650,1052,1053,1077}

1983/04/18 New O-Ring Seals Used On Cover For Auxiliary Start Connector {1401,1402}

1983/04/18 Protection Of Electric System For Machines Used In Corrosive Applications {1400}

1983/04/18 New Special Instruction Available For 6V4135 Halogen Leak Detector {0651}

1983/04/18 Use Of 9S3265 Retaining Compound On AiResearch Turbocharger Compressor Wheel Retainer Nuts {1052,1053}

1983/04/18 Use Pneumatic Tool To Remove Gaskets, Sealants, Paints {0610}

1983/04/18 Changes And Recommendations For Oil Pumps {1304}