MANIFOLD-BOTTOM 6P6877 - Caterpillar

Generator Set:
C9 GEN SET (S/N: SRB1-UP; C9E1-UP; X3R1-UP; SJB1-UP; C9A1-UP)
Industrial Engine:
3126B (S/N: DCS1-UP; BEJ1-UP)
C7 (S/N: JTF1-UP; JRA1-UP)
C9 INDUSTRIAL (S/N: JSC1-UP; MBD1-UP; JLW1-UP)
C-9 (S/N: CLJ1-UP)
Marine Engine:
C7 MARINE (S/N: C7B1-UP; C7D1-UP; C7X1-UP; C7Z1-UP)
C9 MARINE (S/N: C9B1-UP; CSN1-UP; X9X1-UP; Z9X1-UP)
Petroleum Engine:
C9 PETROLEUM (S/N: P9L1-UP)
Description of Change: The new O-rings that are used on the injector sleeve have been improved. The O-rings are now made with a more rugged material.Adaptable To:
Illustration 1 g01437338
(1) Top O-ring (2) Bottom O-ring (3) Injector SleeveWhen the injector sleeves are replaced, also replace the O-rings. Refer to Table 1 for the proper O-ring for your engine.
Table 1
New O-rings    
Location     Part Number     Sales Model    
Top O-ring     310-7255     C7    
C9
3126
Bottom O-ring     310-7257     C7    
C9
3126 Refer to your engine's Disassembly and Assembly Guide, "Unit Injector Sleeve - Install" for the proper installation procedure for the new O-rings and the new injector sleeve.