154060-4900 ZEXEL 9 421 617 023 BOSCH COVER 9421617023 1540604900 9813211860

Introduction
The problem that is identified now has a known permanent solution. Components to perform repairs are limited at this time. Review the solution below for further details. Problem
Caterpillar is aware of recent failures of the 8N-1721 Connecting Rod and the 8N-1984 Connecting Rod on certain diesel and gas applications of 3300 engines. Primary failure mode is a ventilated cylinder block due to the connecting rod crank end failure. All failures have occurred before 500 hours in service. Root cause has been identified and the team is working to resolve the issue. Solution
A "Quality Hold" is active for all new assemblies that utilize the 8N-1984 Connecting Rod and the 8N-1721 Connecting Rod manufactured between 01April 2011 and 31December 2012. The "Quality Hold" is applicable to all Morton service stock also.Cat ® Reman has identified a list of part numbers for Service kits, Piston Packs, and Rod Assembly boxes that may contain defective factory connecting rod assemblies. Dealers are advised not to use any factory new connecting rod assemblies that are found in the kits or assemblies prior to examination. Refer to Table 1.
Table 1
Service kit, Piston Pack, and Rod Assembly Part Numbers That May Contain the Defective New Connecting Rod Assemblies    
8N-1721     20R-1439     20R-1474    
0R-1696     20R-1428     20R-1660    
0R-1697     0R-9206     20R-1442    
0R-3043     20R-1462     20R-1482    
10R-3637     20R-1455     20R-1483    
10R-9259     20R-1477     20R-1451    
0R-1694     20R-1472     20R-1450    
0R-4284     20R-1448     20R-1445    
0R-1695     20R-1446     20R-1443    
0R-4635     20R-1468     20R-1426    
0R-4488     20R-1466     20R-1423    
0R-4506     20R-1441     0R-2078    
0R-3044     20R-1437     0R-3258    
0R-2080     20R-1435     20R-1665    
0R-3259     20R-1434     20R-1663    
0R-3612     20R-1429     20R-1675    
0R-3610     20R-1424     0R-3661    
10R-6152     0R-2557     0R-1692    
20R-1673     0R-2079     0R-1693    
20R-1664     20R-1341     0R-3660    
0R-4949     0R-2555     0R-3662    
0R-9205     0R-3613     20R-1127    
0R-2556     0R-4956     8N-1984    
0R-3706     0R-2554        
10R-1851     0R-4948    
10R-1636     10R-0889    
10R-1840     0R-3611    
0R-2077     10R-7253    
20R-1454     0R-7444    When an engine failure occurs due to the connecting rod assembly, dealers are asked to contact the Dealer Solution Network (DSN) Tier 2 core engine service engineer at Mossville Engine Center (MEC) to expedite support to the customer.To support field repairs and rebuilds, dealers are advised to inspect the manufacture date on any 3304, G3304, 3306, or G3306 engine with the 8N-1984 Connecting Rod , the 8N-1721 Connecting Rod , the 0R-0914 Connecting Rod , and the 0R-0915 Connecting Rod , used to perform repairs. If the manufacture date is within the suspect date range, do not use the part. Parts stocking service letters will be released soon to address suspect material in dealer inventories. Markings on the Suspect 8N-1984 Connecting Rod and the 8N-1721 Connecting Rod
Illustration 1 g03342875
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