BASE AS 4796758 - Caterpillar

Generator Set:
G3408 (S/N: 6NB1-UP; 78Z1-UP)
G3412 (S/N: 7DB1-UP; 81Z1-UP)
Marine Engine:
3408 (S/N: 99U1-UP)
3408B (S/N: 1LG1-UP)
3412 (S/N: 60M1-UP)
3412C (S/N: 8AR1-UP)
3412E (S/N: 4CR1-UP; BFT1-UP; 9PW1-UP)
Engine News SEBD9395, 24 April 2006, "A 117-9712 Drive Idler Shaft Must be Used". Disregard this article. See the replacement article that follows.The 3408 and the 3412 replacement water pumps either new or remanufactured use a tapered roller bearing that is referenced in Engine News, SEBD9221, "Jacket Water Pumps Now Include New Tapered Roller Bearings".Lubrication issues require that the 117-9712 Drive Idler Shaft must be used with the following pump groups:
0R-4679 Water Pump Gp
0R-4680 Water Pump Gp
0R-8799 Water Pump Gp
0R-8800 Water Pump Gp
0R-8801 Water Pump Gp
0R-8802 Water Pump Gp
105-0195 Water Pump Gp
105-0196 Water Pump Gp
105-0197 Water Pump Gp
105-0198 Water Pump Gp
108-1816 Water Pump Gp
108-1817 Water Pump Gp
117-4955 Water Pump Gp
117-4956 Water Pump Gp
134-1486 Water Pump Gp
134-1487 Water Pump Gp
134-1489 Water Pump Gp
134-1490 Water Pump Gp
137-1338 Water Pump Gp
137-1339 Water Pump Gp
137-3367 Water Pump Gp
137-3368 Water Pump Gp
137-3589 Water Pump Gp
137-3590 Water Pump Gp The 117-9712 Drive Idler Shaft has an additional oil passage in order to provide an oil bath to the tapered roller bearings.If an affected water pump is installed on an older engine that does not have the 117-9712 Drive Idler Shaft, the water pump will fail and the engine will be damaged.Note: The remanufactured parts do not have any warnings or notices in the box about these needed changes.