1983/04/18 Caterpillar

Pistons With Thicker Top Rings Must Be Used In Correct Applications {1214,1215}

Usage:

All 3400 Series Engines

Reference: Service Magazine, December 13, 1982, Page 5. In the article, "New Piston Group Has A Thicker Top Ring," you were told about the availability of new piston body assemblies which use a thicker top ring.

These new pistons have a wide taper in the pin boss area. They were designed to be used with wide taper connecting rods. Engine damage can result if these pistons and connecting rods are not used together, correctly.

These new pistons can be used with the earlier connecting rods with the narrow taper in 3406 and 3412 Engines if all the pistons are the same design.

These pistons cannot be used on 3408 Engines with the narrow taper connecting rods because they will cause engine vibration. They cannot be used on any 3400 Series Engines with connecting rods which are the straight design.

Caterpillar Information System:

1983/04/18 Repair Kit For Diesel Fuel Heater Available {1296}

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

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

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

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

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

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

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

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

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

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

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

1983/04/18 Cutting Threads For Caterpillar Taperlock Studs {7553}

1983/04/18 SIRS Index Contains Product Update Information {7570,0374}

1983/04/18 New Reconditioning Specifications For Cylinders Decrease Piston Scuffing And Seizure {0374,1223,1216,1201}

1983/04/25 Valve Spring Retainers Now Have Thicker Flanges{1108}

1983/04/25 Breather Now Made Of Steel Instead Of Plastic{5163,4059,4114,3154,4003}

1983/04/25 Changes To Valve Clearance Settings{0374,1105,1250}

1983/04/25 New Gasket And Cover Used On Governors{1264}

1983/04/25 Remove Plastic Plug From Fuel Transfer Pump{1256}

1983/05/09 New Service Tools Available{0600}

1983/05/09 Change Made To FT1535 Idler Bearing Puller{0621,4167}

1983/05/09 New Specification For Adjustment Of Jacobs Engine Brake{1119}

1983/05/09 Change 6V3060 EGR Testers To LES Testers{0651,1080}