1985/03/01 Caterpillar


New Crankshaft Seal Groups Used On More 3400 Series Engines

Usage:


3408 And 3412 Industrial, Marine and Generator Set Engines

Reference: Engine News, November 10, 1982, Page 4, "New Crankshaft Seal Groups Used".

Description of Change: The reference article tells of new crankshaft seals used in some 3406 Engines. The new crankshaft seals are used on more models of 3400 Series Engines.

Adaptable As: The new 2W1733 (front) and 2W1734 (rear) Crankshaft Seal Groups are direct replacements for the 7N1999 Crankshaft Seal Group in these applications.

Special Instruction, Form SMHS8507, comes with each new seal group. A new Special Instruction, Form SMHS8508 has installation information and a list of the tools needed to install the new seals.

Caterpillar Information System:

1985/03/01 New Drive Coupler Kit Used On Altronic Magneto
1985/03/01 Use The Correct Oil In Natural Gas Engines
1985/03/01 New Cooling System Temperature Regulator Available
1985/03/01 Bleed Holes On Parts Service Cylinder Heads
1985/03/01 New Pressure Conversion Chart Available
1985/03/01 Do Not Weld On Painted Surfaces
1985/03/01 Exhaust Clamp Nut Now Serviced Separately
1985/03/01 Over Fueling Spring No Longer Used In Governor
1985/03/01 A New Book "Analyzing Diesel And Natural Gas Engine Valve Failures" Is Available
1985/03/01 New Service Tools Available
1985/02/01 1985 Customer Training Available At Caterpillar Dealers (North America)
1985/02/01 Tighten Bolts To Correct Torque In 3161 Governor
1985/03/01 Increased Preload Used In Air Shutoff Actuators
1985/03/01 New Transmission Control Valve And Pressure Relief Valve Are Used With High Flow Oil Pump
1985/03/01 Input Shaft And Flange Available As An Assembly; Makes Alignment Easier
1985/03/01 Dowtherm 209 Full-Fill Coolant
1985/03/01 Cross Link Between Fuel Racks Has Smoother Surface
1985/03/01 New Air Cleaner Element Creates Less Restriction
1985/03/01 Installation Of Heli-Coils In Holes With Damaged Threads
1985/04/01 Check Cylinder Block And Head Flatness Whenever There Is A Head Gasket Failure
1985/04/01 Several Types Of Automatic Voltage Regulators (AVR) Used In SR4 Generators
1985/04/01 Crankcase Explosion Relief Valve Kit Available
1985/04/01 Changes To Exhaust Manifolds Help Prevent Broken Studs
1985/04/01 New Turbocharger Oil Supply Tube Assembly Used
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