New Oil Pump Gears Used
Usage:
3406, 3408, 3412 Engines
A change was made to the pitch of the internal oil pump gears in the above engines. If a replacement is needed for one of the former gears, it will be serviced by a pair of the new gears. The pump groups affected by this change are: 0R918, 7C1531, 4N733, 1W729, 6N1030, and 4N8734. The new gears and the former gears are listed in the chart below.
Caterpillar Information System:
1986/07/01 Use Oxygen Meter To Adjust Low Emission Engines
1986/07/01 New Start Switch Used
1986/07/01 Valve Lash Adjustment Interval Is Changed
1986/07/01 Service Parts Containing Asbestos Are Now Labeled
1986/07/01 Increase Piston Reuse With Keystone Piston Ring Gauge Group
1986/07/01 New Engine Timing Indicator Group Available
1986/07/01 New Flexible Coupling Used
1986/07/01 New Service Tools Available
1986/06/01 New Paper Towels Available
1986/06/01 Beaded Cylinder Head Gasket Provides A Better Seal For Camshaft Compartment
1986/06/01 More Precise Governor Speed Adjustment Possible With Attachment Governor Control Groups
1986/06/01 How To Adjust Arming Pressure On Fuel Ratio Control On Caterpillar 3161 Governor
1986/07/01 Changes Have Been Made To 0T Microfiche (Fuel Setting And Related Information)
1986/07/01 Caterpillar Mini Cutting Torch Available
1986/07/01 Update Information For Caterpillar Fuel Injection Equipment Test Stand
1986/07/01 Improvements For Caterpillar 3161 Governors
1986/07/01 Standard Diameter Crankshafts Meeting Marine Society Approval Requirements Are Available Through Caterpillar Remanufactured Products Program
1986/08/01 Oil Cooler Gasket Has Improved Material
1986/08/01 Water Vent Line Improved To Withstand Engine Vibrations
1986/08/01 Change Wiring To Prevent Low Oil Pressure Shutdown Immediately After Start-Up
1986/08/01 Silicone Water Seal Available
1986/08/01 Extended Oil And Oil Filter Change Intervals
1986/08/01 Inspection And Replacement Of Fluid Conductors
1986/08/01 SIMS Reports Must Be Correctly Completed To Be Entered In Data System