1984/10/15 Caterpillar

New High Alloy Material Is Used In Cylinder Head Assemblies{1101}

Usage:

All 3400 Series Engines

Description of Change: A new high alloy material is used in cylinder head castings for all 3400 Series Engines. The new material is more resistant to thermal fatigue cracking than previous materials.

Some 3400 Series Engines were equipped with cylinder head assemblies made of compacted graphite iron. These cylinder head assemblies were used in direct injection (DI) engines, but should not be used in percombustion chamber (PC) engines. The new cylinder head assemblies made of high alloy material can be used in both direct injection and precombustion chamber engines.

Adaptable As: The new cylinder head assemblies with high alloy material, are direct replacements for the former cylinder head assemblies made of compacted graphite iron and gray iron as shown in Chart A.

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NOTICE

Do not install compacted graphite iron cylinder heads on 3400 Series Precombustion Chamber Engines.

The cylinder head assemblies are in effect as shown in Chart B.

Caterpillar Information System:

1984/10/15 Seal Kits Available For Hydraulic Cylinders{5050}

1984/10/08 Deflection Of Flywheel Housings Should Be Controlled During Transportation{1157}

1984/10/08 Temperature Adapter Group Can Be Used With A Caterpillar Multimeter{0776,0785}

1984/10/08 Wiring Changed On Voltage Regulators{4467}

1984/10/08 Information For Reversing Crankshaft Rotation Of All 6.25" Bore V8, V12 And V16 Engines{1000}

1984/10/08 Make Sure There Is Clearance Between The Propeller Shaft Fastener And The Transmission Output Flange{3305}

1984/10/01 Improved Oil Separator Elements Have Longer Service Life{1317,1202,1161}

1984/10/01 Helper Spring Groups Improve Operation Of Air Shutoff Groups{7400,7418}

1984/10/01 New Cylinder Block Groups Used{1201}

1984/10/01 New Gaskets Give A Better Seal To Watercooled Exhaust Manifolds{1059}

1984/10/01 Pressure - Force Conversion Decals Available{0617}

1984/10/01 New Main And Connecting Rod Bearings Have Copper Bond Material{1203,1219,1230}

1984/10/15 New Continuity Testing Light Available{0600,0785}

1984/10/15 New Water Temperature Regulator Has Higher Temperature Setting{1355}

1984/10/15 New Indicator Lamps Used On Generator Control Panels{7002}

1984/10/22 New Heat Exchanger Group Has More Cooling Capacity{1379}

1984/10/22 Improvements Made To Fuel Filter Housing{1260,1261,1262}

1984/10/22 Changes To Water Lines Group Increase Coolant Flow Through Exhaust Manifold{1059}

1984/10/22 Information For Testing 8N7004, 4W7011 And 4W7015 Fuel Injection Nozzles{1254}

1984/10/29 Cetane Injection Group Uses New Orifice, Tee and Seals{1250,1274}

1984/10/29 Foil Shield Will Help Prevent Electrical Interference In Engine Set Point Indicator{0781,0785}

1984/10/29 New Oil Filter Group Can Be Used To Extend Oil Change Interval{1306,1318,1326}

1984/10/29 New Cylinder Head Gasket Helps Prevent Oil Leakage Around Gear Pocket{1101}

1984/10/29 New Heat Shield For Wiring To Electrical Shutoff Group{7400,7403,7418}