KIT-SEAL 1540728 - Caterpillar

Generator Set:
G3406 (S/N: R7E1-UP; KAR1-UP)
G3412 (S/N: R7A1-UP; KAP1-UP)
Engine:
G3406 (S/N: 4FD1-UP; 1RK1-UP)
G3408 (S/N: 6NB1-UP; 6RJ1-UP)
G3408C (S/N: 3WR1-UP; 8YR1-UP; 6FW1-UP; BAZ1-UP)
G3412 (S/N: 7DB1-UP; 3NK1-UP)
G3412C (S/N: 6ZM1-UP; 5KR1-UP; 9RR1-UP; 8LW1-UP)
Description of Change: An improved O-Ring seal is used for the spark plug adapter on G3400 Engines. The new O-Ring seal is manufactured from a rubber compound that is more tolerant to exposure to engine oil and to engine coolant. The new seal is coated with PTFE for easy installation.Adaptable To: The 2S-2251 O-Ring Seal is replaced by the 109-0073 O-Ring Seal .The new seal will be installed in the cylinder head groups that are listed in Table 1. Lubricate the O-Ring seal lightly with 5N-5561 Silicone Lubricant prior to assembly.
Table 1
Engine Model     G3406     G3408     G3412    
Cylinder Head Group     223-6519     206-7748     206-7745    
10R-1970 10R-1137     10R-1134    
223-6521 223-6524     223-6523    
10R-1745     10R-1719    The 109-0073 O-Ring Seal is adaptable to all of the G3400 Engines that are listed above. Also use the new seal with the following serial number prefixes that are not in current production:
1RK
3WR
6FW
3NK
5KR