1984/09/10 Caterpillar

Improved Cylinder Heads And Valve Covers Used{1107,1101}

Usage:

All 3304 And 3306 Engines

Description of Change: Improved cylinder heads and valve covers are used on the above engines. The improved cylinder heads provide more mounting space for the air inlet pipes. The improved cylinder heads no longer have clearance for the valve cover lip at the two air inlet pipe pads. Because of the changes to the cylinder heads, either a new valve cover must be used or the former one must be modified.

Adaptable As: The improved cylinder heads are direct replacements for the former cylinder heads. The part numbers for the cylinder heads did not change.

When an improved cylinder head is used, it will be necessary to use either a new valve cover as shown in the chart, or modify the former valve cover. The lip on the former valve cover must be removed between points A and B as shown in the illustration to allow the valve cover to seal correctly on the cylinder head. Remove 2.5 mm (.10") of the lip from the valve cover. Put a 15.8 mm (.62") radius (four locations) at each end where the lip of the valve cover was removed. Make sure there are no sharp edges and that the valve cover is thoroughly cleaned after the valve cover is modified.

Dimensions for modification to former valve cover.

Caterpillar Information System:

1984/09/10 Differential Oil Pressure In Oil Filter Housing Can Be Checked With A Differential Pressure Gauge{1306,1318}

1984/09/03 Change To Maintenance Interval For Valve Lash Adjustment{1105,1102}

1984/09/03 Tune-Up Kit And Remanufactured Nozzles Available{1254,1074,1107}

1984/09/03 Low Maintenance High Output Batteries Are Now Standard Equipment{1401}

1984/09/03 Use Of Teflon Sealant Makes It Easier To Replace Water Heater Elements{1383}

1984/09/03 New Transfer Gears Have Better Contact And Alignment{3301}

1984/09/03 Rubber Bumpers Limit Movement Of Control Panel{7421,7002}

1984/09/03 New Oil Pan And Brace Assemblies, Coarse Thread Bolts Used Instead Of Fine Thread Bolts{1302,0683}

1984/09/03 New Crankshaft Seal Groups Available{1202}

1984/09/03 New Inlet Valve Used{1105}

1984/09/03 Correct Removal And Installation Of Double-Walled Fuel Injection Lines Help Prevent Fuel Leakage{1252}

1984/08/20 Two New High Speed Marine Transmissions Can Be Used With 3500 Series Engines{3302,3306,3351}

1984/09/17 New Service Tools Available{0600}

1984/09/17 New Gauge In The 1P545 (Tire) Gauge Group Has Dual Scales [kPa (psi)]{0600}

1984/09/17 New Fittings Used In Fuel Filter Lines Group{1274}

1984/09/17 Correct Installation Of Fuel Injection Pumps Can Prevent Fuel Leaks{1251,1253}

1984/10/01 Correct Use Of The 6V4141 Sleeve Metering Calibration Tool Group{0600,0766,0778}

1984/10/01 Tool Drawings Available For Testing Altronic Magnetos On 2P2340 Magneto Test Bench{0709,0712,0767}

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

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

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

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

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

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