POTENTIOMETER 1229458 - Caterpillar

Engine: All 3500 Engines All G3600Introduction
The problem that is identified below does not have a known solution. Until a permanent solution is known, use the recommendations below.Problem
Some connecting rod bearings and main bearings that were electroplated in 2009 have the same date codes as bearings that were previously identified as being suspect. This situation has caused confusion and the return of good bearings from the field.The supplier has plated bearings in 2009 that were originally formed and stamped in 2008.The connecting rod and main bearings are manufactured in a two-step process:
The steel back and the aluminum base are formed and the bearing is stamped with the 5XXXX forming code. An example of the forming code is 5UUND.
The bearing is plated with the lead tin overlay and the month of the plating is recorded by the month code. Month codes include "UC", "UB", and "UD".Note: The month code refers to the month that the plating was applied, not the month of the forming.
Illustration 1 g02024049
(1) Year code (2) Month codeRefer to Illustration 1 for the date code that identifies the bearing.Refer to Table 1 and Table 2 for a list of the part numbers of the bearings that are suspect.
Table 1
3500 Affected Bearings.    
Part Numbers     Description    
107-7330     Connecting Rod Bearing    
107-7331     Connecting Rod Bearing    
107-7332     Connecting Rod Bearing    
107-7333     Connecting Rod Bearing    
107-7334     Connecting Rod Bearing    
107-7335     Connecting Rod Bearing    
230-2520     Connecting Rod Bearing    
283-2579     Connecting Rod Bearing    
283-2580     Connecting Rod Bearing    
283-2581     Connecting Rod Bearing    
283-2582     Connecting Rod Bearing    
283-2584     Connecting Rod Bearing    
149-6031     Main Bearing As    
149-6032     Main Bearing    
149-6033     Main Bearing    
149-6034     Main Bearing    
149-6035     Main Bearing    
196-9527     Basic Engine Repair Kit    
196-9530     Basic Engine Repair Kit    
196-9531     Basic Engine Repair Kit    
Table 2
G3600 Affected Bearings.    
Part Numbers     Description    
192-7870     Connecting Rod Bearing    Solution
Bearings with the following markings are approved for use:
Some bearings will have one of the following indicators on the bearings from Morton parts:
Illustration 2 g02024051
(3) Handwritten "2009"
A handwritten "2009" will be present on the back of the bearing. Refer to Illustration 2.
Illustration 3 g02024054
(4) Ink stamped "09"
An ink stamped "09" also located on the back of the bearing. Refer to Illustration 3.
Illustration 4 g02024056
(5) Stamped indicator
A newly manufactured bearing has a stamped indicator of the year that the plating was applied. Refer to Illustration 4.Note: This Technical Information Bulletin only applies to bearings that have a