2007/03/12 Caterpillar

Engine:

3508B (S/N: BWA1-UP; BTB1-UP; KAM1-UP; 7SM1-UP; 6PN1-UP; BTR1-UP; 5PS1-UP; 5XS1-UP; BPX1-UP)

3516B (S/N: BCK1-UP; KDK1-UP; MSK1-UP; CAN1-UP; FDN1-UP; 6HN1-UP; 7RN1-UP; KNS1-UP; 7DS1-UP; CPW1-UP; 2JW1-UP; MSX1-UP; 6HZ1-UP)

Generator Set:

3508B (S/N: CNB1-UP; ZAD1-UP; PTN1-UP; 5KW1-UP)

3512B (S/N: CMC1-UP)

3516B (S/N: BPJ1-UP; FDN1-UP; ZAP1-UP; GAR1-UP; ZAR1-UP; GZS1-UP; 8NW1-UP; FDX1-UP)

New 10R-3139 Lifter As and new 10R-3140 Valve Lifter As are now available. The new lifter assemblies feature the following improvements.

• Longer service life

• Improved roller pin

• Stronger pin

• Improved retention of the pin inside the lifter body

Caterpillar recommends replacing the camshafts with the same part number when you replace the 10R-3139 Lifter As and the 10R-3140 Valve Lifter As .

The former part numbers listed in Table 1 have been cancelled and replaced by the new part numbers that are listed in Table 1.

The former part numbers listed in Table 2 have been cancelled and replaced by the new part numbers that are listed in Table 2.

Note: Mark the position of the lifters before the lifters are removed from the engine. If the lifters can be reused, install the lifters in the same position. Refer to Reuse and Salvage Guidelines, SEBF8146, "Visual Inspection of Camshafts" in order to see if the camshafts can be reused. Refer to Guideline For Reusable Parts And Salvage Operations, SEBF8191, "Camshaft Roller Followers 3500 Family of Engines " in order to see if the lifters can be reused.