1982/05/03 Caterpillar

Inspection Marks On Bearings{7551,1230,1226,1203,1219,1227}

Usage:

All Caterpillar Engines

There have been some reports about marks on engine bearings in parts shipments. These marks are caused by tools that are used to measure bearing thickness. They do not affect bearing performance or service life in any way.

There are three basic quality control marks found on some bearings. The most common type of mark is two parallel lines near the edges of the bearing, as shown in Illustration 1. Illustration 2 shows another type of mark. There are usually five or six of these marks evenly spaced on the back of the bearing. The third type of quality control mark is shown in Illustration 3. These are short marks which extend in from both edges on the front of the bearing.

Illustration 1.

Illustration 2.

Illustration 3.

Caterpillar Information System:

1982/05/03 Use 6V6018 Skiving Vise To Hold XT Hose Assemblies{0623,0626,7554}

1982/05/03 Use The Correct BrakeSaver Seal Group{1155}

1982/05/03 Use New 6V4910 Clamp-On Ammeter For Easier Electrical Current Measurement{0651}

1982/05/03 Lubricant Recommendations Changed For All Caterpillar Engines To Combat Effects Of Fuel Sulfur{1318,0375,0374,1280}

1982/05/03 New 6V4950 Injection Line Speed Pickup Group Used With 6V2100 Multitach{0651}

1982/05/03 Use New Special Instruction To Install 5P6595 Insert In Cylinder Liner Seats{1216,0621}

1982/05/03 6V4960 AC Current Probe Will Measure Current Easier{0652}

1982/04/26 Expansion Tank Changed To Permit Installation Of Water Level Gauge{1354,7470}

1982/04/26 Improved Relief Valve Guide Decreases Maximum Oil Pressure During Cold Weather Starts{1315,1304}

1982/04/19 New Broken Link Spring Used In Governor{1264}

1982/04/19 Improvements Made To 6V3000 Sure Seal Repair Kit{0611,1408}

1982/04/12 Use Correct Size Bolt To Install 5P9736, 6V2156 Or 6V2157 Link Brackets{0644}

1982/05/10 Larger Press And Improved Tooling Now Available To Fabricate XT Hose{0623,0624,0664}

1982/05/10 Bolts Now Used Instead Of Studs To Hold Cylinder Heads{1101,1201}

1982/05/10 New Exhaust Tubes And Support Used{1061,1067}

1982/05/10 New Crankshaft Main Bearings Used{1203}

1982/05/10 New Mounting Bracket For Mechanical Shut-Off Cable{7418}

1982/05/10 5P4812 Gauge Group Components Available Separately{0653,1215}

1982/05/10 5P3519 Gauge Group Components Available Separately{0653,1215}

1982/05/10 Be Sure To Use Correct Water Temperature Regulators{1355}

1982/05/10 Fuel Rack Slots Have Improved Wear Resistance{1257}

1982/05/10 Two-Piece Guard For Alternator Fan And Belts{1400}

1982/05/17 Holes Added To Water Pump Impeller{1361}

1982/05/17 Wrong Water Separator Element Will Not Remove Water{1263}