1978/05/22 Caterpillar

New Gasket Installed Between Flywheel Housing And Cylinder Block{1157,1201}

Usage:

3408 Industrial, Marine and Truck Engines;
631D, 633D and 637D Tractors

Description of Change: A gasket with a higher strength material is now used in the flywheel housing group for the above models. Also, the new gasket has more resistance to damage from oil than the former gasket. Both of these improvements give the new gasket a longer service life than the former gasket.

Adaptable As: The new 7N9331 Gasket-Cylinder Block (Rear) is a direct replacement for the former 4N5713 Gasket-Cylinder Block (Rear) which is canceled.

INSTALLATION: Use the new procedure shown on Page 2 of the July 4, 1977 Service Magazine to tighten flywheel housing bolts.

NOTE: Do not use a gasket sealer or any type of lubricant to install the new gasket. Gasket sealer or lubricant will cause the gasket to become soft and the result can be oil leakage. The recommendation now is to use guide pins.

Caterpillar Information System:

1978/05/15 Stronger Fuel Inlet Flanges Prevent Parts Damage And Keeps Air Out Of The Fuel System{1253}

1978/05/15 New Drive Belt Idler Pulleys Have Larger Bearings{1358,1359}

1978/05/15 Silicone Grease Now Used In Seal Ring Groove In Turbochargers{1052,1053,1077}

1978/05/15 Explanation Of Nomenclature Used In Engine Performance{1000,0374}

1978/05/15 Parts Information For Vickers Pumps Which Have Steel Backed Bronze Plates Between Rotor And End Plates{5055}

1978/05/08 Preparation Of Caterpillar Product For Delivery{7500}

1978/05/08 Threads In Aluminum Housings On Hydraulic Pumps Can Be Damaged, If Bolts That Are Too Short Are Used{5073}

1978/05/08 Coolant Syringe And Battery Fluid Probe Now Available{0651}

1978/05/08 Timing Dimension For Fuel Injection Pumps Changed; 1P7410 Timing Plates Have More Exact Degree Marks{0650,1250}

1978/05/08 Longer Hoses Used At Radiator Lower Hose Connections{1380}

1978/05/08 New Water Temperature Regulator Housing Cover Has A Check Valve{1380,1355}

1978/05/01 Water Separator Added To Give Protection To The Sleeve Metering Fuel System{1250}

1978/05/22 Use New Tools To Adapt Former Cylinder Heads With Counterbores To Cylinder Blocks With Spacer Plates{0600,1100,1101,1201}

1978/05/22 Optional Assembly Procedure For Sperry Vickers Pumps With New Type Cartridges{5055}

1978/05/22 Modification Of Drive Adapter For Fuel Injection Test Bench{0650,1272}

1978/05/22 New Governor Spring Gives Correct Balance Point Speed{1264}

1978/05/29 Attachment Groups Put Corrosion Inhibitor Directly Into Cooling System{1350}

1978/05/29 5P9722 Driver Needed To Install New Seal Assembly In Water Pumps{0622,1361}

1978/05/29 A New Exhaust Manifold And Fuel Pump Heat Shield Is Used On Industrial Engines That Have A Woodward Governor With An Electric Motor{1059,1250,1289}

1978/06/05 Procedures And Cautions For Use Of A Flex-Hone On 3204 And 3208 Engines{1201}

1978/06/05 Information Plate Installed On BrakeSaver Housing{1155}

1978/06/12 Use New Main Bearings In Replacement Cylinder Blocks{1203,1201}

1978/06/12 New Crankshaft Damper Assembly For 3306 Vehicular Engines Gives Longer Service Life{1205}

1978/06/12 5P8626 Tool Bit Available To Machine The 5P6595 And 5P8607 Liner Seat Inserts{0664}