1978/07/03 Caterpillar

New One-Piece Flywheel Housing Gasket{1157,1201}

Usage:

3406 Engines

Description of Change: A stronger one-piece flywheel housing gasket, which does not need gasket cement for installation, is now used on 3406 Engines. The gasket cement used to install the former gasket can cause deterioration (to lower the quality) of the gasket material and early failure of the gasket. Also, the material in the new gasket has more resistance to engine oil than the former gasket. Engine oil can make the former gasket soft, which can also cause early failure of the gasket.

Adaptable To: All earlier 3406 Engines. The new 7N9335 Gasket is a direct replacement for the former 4N1093 Gasket which is canceled.

INSTALLATION: The new 7N9335 Gasket must be installed dry.

NOTE: Before installation of the new gasket, the front face of the flywheel housing, rear face of the block, and both sides of the gasket must be free of contaminants (dirt, oil, fuel, water, gasket, cement, etc.).

Caterpillar Information System:

1978/07/03 New BrakeSaver Rotor Support Prevents Damage To Seals And Stator{1155}

1978/07/03 Improved Seal Rings For Turbine End Of Turbochargers{1052}

1978/07/03 Use New Seal Drivers To Install Primary Seals In Vickers Pumps{0622}

1978/07/03 Use The Drive Sleeve On The Fuel Injection Pump Camshaft Only One Time{1286,1256,1251}

1978/06/26 Fluid-Type Vibration Damper Now Used Instead Of Rubber-Type Damper{1205}

1978/06/26 A One-Piece Spring Seat Is Now Used In The Governor{1264}

1978/06/26 New Dashpot Spring Gives A Reduction In "Overshoot"{1264}

1978/06/26 Do Not Use Plastic Tubing And Compression Fittings Without An Insert As A Fuel Supply Line{1274}

1978/06/26 Changes Made To Warning Plates, Decals And Service Literature For Caterpillar Machines{7405}

1978/06/26 Mounting For Transmission/Torque Converter Oil Cooler Improved To Decrease Vibration{1375}

1978/06/19 Grind Material From Boss On Parts Service Cylinder Block To Give Clearance For Starting Motor Mounting Bolt{1201,1453}

1978/06/19 5P8700 Lifting Brackets Permit Cylinder Head Assembly To Be Removed And Installed{0644,1100}

1978/07/03 Disconnected Air Cleaner Hose Can Cause Engine Damage{1058,1051}

1978/07/10 New Flange-Type Seal Used At Rear Of Crankshaft{1161}

1978/07/10 Drill Hole In Handle Of Early 5P3520 Spanner Wrenches For Use With 5P8675 Extension Handle{0620}

1978/08/07 Four New Contact Points Added To 5P6524 Engine Timing Indicator Group{0653}

1978/08/07 New Glow Plug Wiring Harness Prevents Short Circuit{1403}

1978/08/07 Remove Fuel Injection Nozzles Before The Bottom Surface Of A Cylinder Head Is Cleaned{1254,1101}

1978/08/21 Take Advantage Of The Assembly Procedures And Specifications Charts{0374}

1978/08/21 Overlap Joint On Crankshaft Front Seal Ring Prevents Leakage{1160,1202}

1978/08/21 Sleeve-Type Ring Compressors Can Be Used For Installation Of Pistons From The Bottom Of The Engine{0622}

1978/08/21 Improved Guide Pin For Fuel Injection Pump Lifters{1251}

1978/08/21 Improved Piston Pins Are Made Of Different Material For Better Hardness Characteristics When Heat Treated{1214}

1978/08/28 Tips For Service Information Retrieval System (SIRS) Users{0374}