1982/05/19 Caterpillar


Inspection Marks On Bearings

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:

1982/05/19 List Of Service Publications
1982/05/19 New Crankshaft Main Bearings Used
1982/05/19 Use The Correct Brakesaver Seal Group
1982/05/19 Reminder: Check Valve Lash Adjustment At Correct Intervals
1982/05/19 New 6V4950 Injection Line Speed Pickup Group Used With 6V2100 Multitach
1982/05/19 Fuel Rack Slots Have Improved Wear Resistance
1982/03/31 New Diaphragm Used In Fuel Ratio Control
1982/03/31 Use 6V6035 Hardness Tester On Crankshafts
1982/03/31 Engine Storage; Engine Start-up After Storage
1982/03/31 New Adapters And O-ring Seals Used In Aftercooler Group
1982/03/31 List Of Service Publications
1982/03/31 New Piston Pin Retainer Used
1982/05/19 5P4812 Gauge Group Components Available Separately
1982/05/19 Conversion Of 49-State 3406 Truck Engine From 283 Kw (380 Hp) To 298 Kw (400 Hp) Arrangements
1982/05/19 5P3519 Gauge Group Components Available Separately
1982/05/19 Be Sure To Use Correct Water Temperature Regulator
1982/05/19 Lubricant Recommendations Changed For All Caterpillar Engines To Combat Effects Of Fuel Sulfur
1982/05/19 Improved Relief Valve Guide Decreases Maximum Oil Pressure During Cold Weather Starts
1982/05/19 Larger Studs Can Be Used With Rear Exhaust Manifolds
1982/05/19 New Exhaust Tubes And Support Used
1982/05/19 Use Correct Part Numbers For Main And Connecting Rod Bearings
1982/06/23 Fuel Ratio Control Is Now Available As A Group
1982/06/23 New Seal Used In Turbocharger Mounting; Check Mount Casting For Clearance
1982/06/23 List Of Service Publications
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