1987/07/06 Caterpillar

High Alloy Cylinder Head Improved{1101}

Usage:

3406, 3406B Engines

Reference: Service Magazine, October 15, 1984, Page 2, "New High Alloy Material Is Used In Cylinder Head Assemblies". The article describes the use of new high alloy material in cylinder head castings for all 3400 Family Of Engines.

Description of Change: A new cylinder head is in use for the 3406 and 3406B Engines. The new head has improved exhaust porting and is made from the high alloy material discussed in the reference article.

Adaptable To: The new 7W6 Cylinder Head is a part of the new 7W7 Cylinder Head Assembly, and serviced as 7W9 Cylinder Head Assembly. These parts are direct replacements for the former 7W2200 Cylinder Head, 7W2201 Cylinder Head Assembly, and 7W2204 Cylinder Head Assembly, respectively. The new parts are in effect with the engines listed in the chart.

Caterpillar Information System:

1987/07/06 Silicone Rubber Water Seals Available{1100}

1987/07/06 New Cylinder Head And Spacer Plate Gaskets Prevent Oil Leakage Around Gear Pocket{1101}

1987/07/06 Testing Connecting Rod Eye Bushings When Overhauling Engines{1218}

1987/06/29 Check For Shipping Plugs On The Inside Of New Pistons{1214}

1987/06/29 New Water Pump Group Used{1361}

1987/06/29 Recommendations For Reusability Of Pistons With Crater Rim Cracks{1214}

1987/06/15 Use Of Crankshaft Seal Adapter Eliminated {1150,1160,1161}

1987/06/15 All Three Main Bearing Part Numbers Stamped On Lower Portion Of Standard Size Bearing {1203}

1987/06/15 New Relief Valve Guide Used In Oil Pump Groups {1304}

1987/06/15 New 1U5230 Hand Pump (General Purpose Hydraulic) Available {0646}

1987/06/15 New 1U5752 Retainer Tool Available To Service Hydrostatic Transmissions {0721}

1987/06/15 1U5495 Latch Group Available For Earlier Large Duo-Cone Seal Installers {0700,4052}

1987/07/06 3400 Engine Major Component Performance Guide Available{0374}

1987/07/06 New Power Takeoff Groups Used; New System Gives Better Face And Bore Runout On Front Power Takeoff Adapters{3050,3107}

1987/07/06 New Sealant Used On Oil Pan Mounting Bolts{1201,1302}

1987/07/06 New 1U5524 Adapter Cable Available For Use With 6V9060 Spark Timing Adapter Group And 8T5300 Engine Timing Indicator Group{0779,0781}

1987/07/06 New Electronic Modular Control Panel (SR-4 Generator Mounted){4450,7002}

1987/07/13 New Engines Rated @ 160 kW (210 hp) @ 2600 rpm Must Be Rerated When Used To Replace 2800 rpm Engines{0374}

1987/07/20 New Cylinder Liner Available {1216}

1987/07/20 Additional Guidelines For Using The 8T2700 Blowby/Air Flow Indicator Group {0781,1200,1350}

1987/07/20 Remanufactured Electronic Modular Control Panel Modules (EMCP) For Package Generator Sets {7002}

1987/07/20 Gas Regulator Setting Tool Group Available {0782}

1987/07/27 Box Labels Available For Pleasure Craft Cruise Kits{1000}

1987/08/03 More Test Gauges, Adapters And Hoses Available For All Power Shift Transmissions And Hydraulic Systems {0783,0784,3150,5050}