RING 8U2360 - Caterpillar

Truck Engines:
3406E (S/N: 1LW1-UP; 2WS1-UP; 5DS1-UP; 5EK1-UP; 6TS1-UP; 1MM1-UP)
Truck Engine News SEBD6726, August 2001, "New O-Ring Seals Are Now Available". This article is replaced by the following article.Description of Change: New unit injector sleeves and O-ring seals are now available. The new O-ring seals are made from a new material. The new O-ring seals have a larger cross section. The O-ring seals must be used with the new unit injector sleeve.Adaptable To: The new 166-3739 Unit Injector Sleeve replaces the former 104-5536 Unit Injector Sleeve. The former 104-5536 Unit Injector Sleeve has been cancelled. The new 166-2903 O-ring Seal (2) is used in the top position. The new 166-2904 O-ring Seal (3) is used in the middle position. The 9X-7430 O-ring Seal (4) is still used in the bottom position. The new O-ring seals must be used with the new unit injector sleeve.
Illustration 1 g00811320
(1) 166-3739 Unit Injector Sleeve (2) 166-2903 O-ring Seal (3) 166-2904 O-ring Seal (4) 9X-7430 O-ring Seal If the former 104-5536 Injector Sleeve does not need to be replaced, use the 166-3718 O-Ring Seal in position (2) and (3). Use the 9X-7430 O-Ring Seal in position (4) .Both the new unit injector sleeves and the former unit injector sleeves can be used in the same engine. Contact your Caterpillar Dealer for more information.