LINK(CONNECTING) 5B6401 - Caterpillar

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
(1 ) Date code markingsNote: Do not use factory new connecting rod assemblies with manufacturing dates between April 2011 and December 2012.These defective factory new rod assemblies do not have any marking on the machined bottom face of the connecting rod cap.
First pair of digits is year
Second pair of digits is monthRefer to Illustration 1.Markings on the Correct 0R-0914 Connecting Rod and the 0R-0915 Connecting Rod
Illustration 2 g03342881
(2) One type of marking
Illustration 3 g03342893
(3) Other type of markingOnly use Genuine CAT Reman connecting rod assemblies. The genuine CAT Reman connecting rod assemblies can be identified by viewing the connecting rod cap from the bottom face. The defective factory new rod assemblies do not have any marking on this machine surface. Genuine CAT Reman connecting rod assemblies have one of the two markings shown Illustrations 2 and 3.