1984/02/06 Caterpillar

New Cylinder Head Assembly Made With A Different Material {1101}

Usage:

All 3406 Engines

SUPPLEMENT: 10/15/84

SERVICE MAGAZINE, FEBRUARY 6, 1984, PAGE 3. Put a mark through the article "New Cylinder Head Assembly Made With A Different Material".The article made reference to a new material (compacted graphite iron) used in 3406 Direct Injection Engines. The compacted graphite iron cylinder heads should not be used in precombustion chamber engines. A new high alloy material is used in all cylinder heads (direct injection and precombustion) used in 3400 Series Engines.

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Description of Change: A new head assembly is now used in the cylinder head groups on 3406 Engines. The new head assembly is made from a different material. The new material makes a stronger casting that has more resistance to cracks.

Adaptable As: The new 1W1509 Cylinder Head Assembly is a direct replacement for the former 7N1303 Cylinder Head Assembly. The former 7N1303 Head Assembly is canceled. The new cylinder head is in effect as shown in the chart.

Caterpillar Information System:

1984/02/06 Correct Oil Pressure Setting For Marine Transmissions {3353,3354}

1984/02/06 New Service Tools Available {0600}

1984/01/30 Larger Capacity Oil Pan Permits Longer Oil Change Interval{1302,1307}

1984/01/30 Modification May Be Necessary To 6V4902 Hose Press Tool{0623,0624,0665}

1984/01/30 3406B Engines Available{1000}

1984/01/30 Correct Wiring And Fuse Must Be Used For Correct Operation Of Shut-Off Solenoid Group{1259}

1984/01/30 New Water Temperature Regulator Helps Prevent Engine Overcooling{1355}

1984/01/23 New Overhaul Kit For Sea Water Pump Has Improved Impeller{1364}

1984/01/23 Remanufactured Connecting Rod Assemblies{1218}

1984/01/23 Housing Assembly Now Has Sleeve To Prevent Housing Damage{3306}

1984/01/23 New Plastic Impeller Will Help Improve Service Life Of Water Pump Seal{1361}

1984/01/16 New Cover And Lever Will Prevent Overtravel Of Valve Spool {3313}

1984/02/06 New Water Pump Groups Have Improved Impellers And Shafts {1361,1364,1389}

1984/02/06 Product Information System Available On Dealer Terminal System (DTS) For U.S. And Canadian Dealers {0371}

1984/02/06 Longer Seat Belts Can Be Installed If Necessary {7327}

1984/02/06 New And Revised Special Instructions Will Have Reference Literature Listed On The Front Page {0374}

1984/02/06 Procedure To Remove Sharp Edges From Fuel Racks {1257,1253}

1984/02/13 Differential Oil Pressure In Oil Filter Housing Can Be Checked With A Differential Pressure Gauge{1318,1306}

1984/02/13 Some Crankshafts Must Be Tufftride Hardened After A Regrind{1202}

1984/02/13 New Service Center For 6V2192 Injection Transducer{0651}

1984/02/13 Remanufactured Cylinder Head Assemblies{1100,1101}

1984/02/13 Correct Fuel Line And Elbow Installation Will Prevent Damage To Fuel Manifold And Elbow{1252}

1984/02/13 Engine Will Not Restart Immediately After It Has Been Shut Down{7002,7421}

1984/02/13 Fuel System Manual Bleed Valve Removed; Drain Lines Group Added{1251,1253,1286}