SEAL AS 2503988 - Caterpillar

Engine:
3406E (S/N: 5EK1-UP)
3406E (S/N: 1MM1-UP)
3406E (S/N: 2WS1-UP)
3406E (S/N: 6TS1-UP; 1LW1-UP)
C-15 (S/N: 6NZ1-UP; 9NZ1-UP)
C-16 (S/N: 7CZ1-UP)
Truck Engine News SEBD6825, July 2009, "3406E and C-15 Low Idle Instability ". Disregard this article. Refer to the article that follows.Remanufactured Injectors that are used in the engines that are listed above experienced rough low idle. The rough low idle was caused by incorrect valve opening pressure. Incorrect valve opening pressure caused the injector to deliver the fuel too late in the power stroke. The engine runs rough under the following conditions:
The engine has reached operating temperature.
Idling between 700 and 1000 rpm
No load conditionRefer to Table 1 in order to determine the injectors that are affected.
Table 1
Part Numbers for the Fuel Injectors    
10R-2780     Fuel Injector Gp    
10R-2781     Fuel Injector Gp    
10R-0957     Fuel Injector Gp    
10R-0958     Fuel Injector Gp    Not all injectors below the serial number break in Table 2 have exhibited low idle instability. Many of the injectors that were built before the serial number break work properly.
Table 2
Serial Numbers for the Injectors    
Injector Serial Number     Part Number of the Injector    
1194092     10R-0957 Fuel Injector Gp    
1196730     10R-0958 Fuel Injector Gp    The Dealer Solution Network (DSN) can be contacted in order to help identify the problem. Only replace a faulty injector with a new injector that has a serial number which is higher than the serial numbers that are listed in Table 2.Note: Injectors that pass Caterpillar performance tests will be returned to the dealer if the injectors were replaced without consulting the factory or the DSN.