SEAL-O-RING 4W1596 - Caterpillar

Engine:
3304 (S/N: 10E1-UP; 13E1-UP; 83Z1-UP)
3304B (S/N: 1NS1-UP)
3306 (S/N: 64Z1-UP; 85Z1-UP)
3306B (S/N: 8JJ1-UP)
3406C (S/N: 2AM1-UP)
3408B (S/N: 9TD1-UP)
3408C (S/N: TAM1-UP)
3412 (S/N: 7HG1-UP; 2WJ1-UP; 4BZ1-UP; 38S1-UP)
3412C (S/N: 5FL1-UP; DJN1-UP; 9EP1-UP; RLR1-UP; 9BR1-UP; BCW1-UP; LRY1-UP)
Generator Set:
3406 GEN SET (S/N: 4ZR1-UP; 75Z1-UP)
3406C GEN SET (S/N: KPS1-UP; 9ES1-UP)
3406C MARINE GS (S/N: PFH1-UP; 4BM1-UP)
3408C GEN SET (S/N: 78Z1-UP)
3412C GEN SET (S/N: 81Z1-UP; BAX1-UP)
Industrial Engine:
3304 IND (S/N: 04B1-UP)
3306 IND (S/N: 66D1-UP; 70R1-UP)
3406 IND (S/N: 90U1-UP)
3406B IND (S/N: 6TB1-UP)
3408B IND (S/N: 67U1-UP)
Marine Engine:
3304 MARINE (S/N: 05B1-UP)
3306 MARINE (S/N: 67D1-UP)
3406 MARINE (S/N: 91U1-UP)
3406C MARINE (S/N: 1SS1-UP)
3408B MARINE (S/N: 99U1-UP)
3408C MARINE (S/N: 1TS1-UP)
3412 MARINE (S/N: 60M1-UP)
3412E MARINE (S/N: 9KS1-UP; 9PW1-UP)
Engine News SEBD9573, 5 January 2009, "A New Connecting Rod Bearing is Available". Disregard this article. See the article that follows.A new supplier has been selected in order to produce the new connecting rod bearing. This change has resulted in a new part number. The new bearing is adaptable back to first production on the machines that are listed above.Refer to Table 1 for the part number of the old bearing and the replacement part number.
Table 1
Old part number     Replacement part number    
4W-5739     328-5572    
9Y-7735     328-5573    
9Y-9497     328-5574