New Oil Pump Gears Used
Usage:
3406, 3408 Truck 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 Update Information For Caterpillar Fuel Injection Equipment Test Stand
1986/07/01 Increase Piston Reuse With Keystone Piston Ring Gage Group
1986/07/01 Prevent Gasket Leakage On 3406B Truck Engines Equipped With Jake Brakes
1986/07/01 List Of Metal Surface Reconditioning Products Available From Caterpillar
1986/07/01 Caterpillar Mini Cutting Torch Available
1986/07/01 Changes Have Been Made To 0T Microfiche (Fuel Setting And Related Information)
1986/07/01 New Engine Timing Indicator Group Available
1986/07/01 Valve Lash Adjustment Interval Is Changed
1986/07/01 Some 3406B Truck Engines With ATAAC Do Not Have Fuel Ratio Controls
1986/07/01 Service Parts Containing Asbestos Are Now Labeled
1986/07/01 Brushless Alternators May Not Charge In Certain Conditions
1986/07/01 New Service Tools Available
1986/08/01 New Material Used For Disc In Valve Assemblies In Fuel Transfer Pump Groups
1986/08/01 SIMS Reports Must Be Correctly Completed To Be Entered In Data System
1986/08/01 Inspection And Replacement Of Fluid Conductors
1986/08/01 Oil Cooler Gasket Has Improved Material
1986/08/01 Southern California Trucker Cuts In-frame Overhaul Time With Caterpillar Cylinder Pack Removal Tool
1986/09/01 Indications Of Engine Overspeeding When Only One Cam Lobe/Lifter Has Failed
1986/09/01 Bearing Failures On Truck Engines Due To Lack Of Lubrication
1986/09/01 Heavy-Duty Line Of Batteries Available To U.S. Dealers
1986/10/01 Benefits Of Using The Caterpillar Inc. Product Information System
1986/10/01 More Flexible Lockwire Used With Nylon Seals For Sealing Critical Areas
1986/10/01 List Of Service Publications
1986/10/01 New Service Tools Available{0600}