1980/08/13 Caterpillar


New Bend Specification For Used Or Field Reground Crankshafts

Usage:


All Caterpillar Engines

A new bend specification of 0.13 mm (.005") maximum T.I.R. (Total Indicator Reading) for main bearing journals is to be used for both used and field reground crankshafts. This new specification is to be used when a crankshaft is measured according to the "Guideline For Reusable Parts-Procedure To Measure Bent Crankshafts," Form No. SEBF8030-01. Make a note of this change in the above publication.

A future revision will have this change.

Caterpillar Information System:

1980/08/13 Some Nuts Used On Main Bearing Caps Are Smaller Than Standard Size Across The Flat Sides
1980/08/13 Improved Power Takeoff Service Kits
1980/07/09 Check Retainer Screw Depth In Plastic Pads Of 5P8637 Crankshaft Support Groups
1980/07/09 Check Journal Hardness On Reground Crankshafts
1980/07/09 In The Future, Oversize And Undersize Connecting Rod And Main Bearings Will Have Size Identification Marks In Metric Units
1980/07/09 List Of Service Publications
1980/07/09 Timing Groups To Be Canceled
1980/07/09 Visual Checks And Easy Tests Can Be Of Assistance When Troubleshooting Coolant Leakage Into The Lubrication System
1980/07/09 New Planetary Group Has Gears Which Operate With Lower Noise Levels
1980/07/09 Follow Correct Procedures For Installation Of Fuel Filters And Priming The Fuel Systems
1980/07/09 Kysor Air-Operated Shutdown Actuators For 3406, 3408, 1693 Truck Engines
1980/07/09 6V3075 Dial Indicator (Metric) Is Available
1980/08/13 Two New Front Power Take-Off Groups Are Available
1980/08/13 6V3030 Digital Multimeter, 6V3031 Case And 6V3032 Test Lead Kit Are Now Available For Troubleshooting Electrical Circuits And Components
1980/08/13 New Caterpillar Publication, "Questions And Answers About Engine Bearings" Is Available
1980/08/13 Alcohol Fuels Are Not Recommended For Use In Caterpillar Diesel Engines At The Present Time
1980/08/13 Some Valve Lifter Assemblies Have A Black Color On The Finished Surface
1980/08/13 Pistons Which Use Keystone-Type Rings Can Be Installed In Place Of Pistons Which Use Rectangular-Type Rings
1980/08/13 Higher Capacity Auxiliary Pump Group Is Now Available
1980/08/13 Carbon Cutting On Thrust Side Of Piston Top Land Is Normal Condition For Pistons With Offset (Not In Center) Pin Bores
1980/09/10 6V3143 Distorter Adapter Available For Use With 5P7409 Wear Sleeve Distorter For Removal Of Crankshaft Wear Sleeves
1980/09/10 5P1746 Governor Sealing Tool Available Separately
1980/09/10 4S6553 Engine Evaluation Test Instrument Group Has Been Canceled
1980/09/10 Special Bolts Available For Better Protection Against Modifications Of Fuel System And Governor Settings
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