1982/08/25 Caterpillar


Improved Engine Oil Cooler Assembly

Usage:


3412 Industrial And Marine Engines

Description of Change: The 3412 Industrial and Marine Engines have an improved engine oil cooler core assembly. The two inner end sheets have been removed, and the baffle spacer bars have been shortened. See the illustrations.

Without the inner end sheets, it is possible to remove all of the brazing flux residue from the core assembly, as the core is being assembled. Formerly, it was possible for some of the flux residue to remain in the core assembly after it was assembled. The residue can cause corrosion of the tubes in the core assembly, and the tubes can fail.

Adaptable To: The new 1W7406 Cooler Core Assembly is a direct replacement for the former 6N9114 Cooler Core Assembly, which is canceled.


Illustration 1. New 1W7406 Oil Cooler Core Assembly.


Illustration 2. Former 6N9114 Oil Cooler Core Assembly.

Caterpillar Information System:

1982/08/25 Information Available For The Installation Of Inserts In Cylinder Blocks And Spacer Plates
1982/08/25 New Air Starting Motor Group Available
1982/08/25 Make Set Point Measurements Easier With The 6V4060 Engine Set Point Indicator
1982/06/16 New Seal Used In Turbocharger Mounting; Check Mount Casting For Clearance
1982/06/16 Avoid Overheating Of Rear Power Take Off Clutches
1982/06/16 New Exhaust Tubes And Support Used
1982/06/16 New Address For Repair Of Diagnostic Tools
1982/06/16 Carbon Cutting On Piston Top Land
1982/06/16 List Of Service Publications
1982/06/16 Larger Studs Can Be Used With Rear Exhaust Manifolds
1982/06/16 New, Improved Impeller Used In Water Pump
1982/06/16 Improved Water Separator Group Used
1982/08/25 New Thrust Washer Can Prevent Wrong Oil Sample Readings
1982/08/25 Separate Valve Stem Gauges Available
1982/08/25 Caterpillar Recommends Against The Use Of Alcohol Mist Injection Systems
1982/08/25 New Auxiliary Pump Group Operates At A Slower RPM
1982/08/25 Oil Passage Plugs Are No Longer Installed In Crankshafts For Parts Service
1982/08/25 New Gear Type Pump Primes Itself At Start-Up
1982/08/25 Repair Kit For The 5P9700 Hose Cutter Is Available
1982/08/25 List Of Service Publications
1982/08/25 Caterpillar-Built Industrial Engines Available In New Machines
1982/08/25 Stronger Turbine Wheel Used In Turbocharger Shaft And Wheel Assemblies
1982/08/25 Excessive Oil Consumption: Check The Accuracy Of The Oil Level Gauge
1982/08/25 New Crankshaft Wear Sleeve For Engines With Lip-Type Seals
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