2010/06/15 Caterpillar

An Improved Piston Is used on 3500 Remanufactured Engines {1225}

Usage:

777B 4YC

Engines: 3508 (S/N: 5TL1027-UP; 4ZL1441-UP) 3508B (S/N: BWA188-UP; BTB268-UP; KAM333-UP; BTR505-UP; 5XS1011-UP) 3512 (S/N: 5EL416-UP; 6FL953-UP) 3512B (S/N: SDW358-UP) 3516 (S/N: 6CL637-UP; 7CL2023-UP) 3516B (S/N: KDK208-UP; MSK228-UP; KNS569-UP; 7DS1017-UP; CPW1116-UP) 3524B (S/N: CND430-UP; NPM196-UP)

Description of Change: Engineering changes have been made to build all Reman 3500 Engines with one-piece pistons and eliminate the two-piece pistons from factory builds.

Adaptable To: Beginning on 1April 2010 all 3500 Reman Engines consists and bills of materials were changed to utilize the one-piece ( 10R-9270, 10R-4377, and 10R-4342 ) pistons. Previous bills of material allowed for the use of two-piece pistons if the supply of one-piece pistons did not meet the 3500 Engine build schedules. The beginning engine serial numbers for the piston change are listed below. For engine (prefix 7DS) arrangement numbers 0R9551 and 10R-2851 , one-piece pistons were used in production starting with serial number 7DS931-UPon 6April 2009.

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Table 1
3500B HD (LS)
10R9270
Arrangement #	Effective Serial Number	Date
0R8668	S/N:CND00430-UP	20May 09
0R7568	S/N:CPW01116-UP	20May 09
10R2853	S/N:KDK00208-UP	20May 09
10R0946	S/N:KNS00569-UP	20May 09
10R2852	S/N:MSK00228-UP	20May 09
10R1433 10R1676	S/N:NPM00196-UP	20May 09

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Table 2
3500B (SS)
10R4342
Arrangement #	Effective Serial Number	Date
0R9551 10R2851	S/N:7DS000931-UP	6Apr 09
0R9551 10R2851	S/N:7DS000931-UP	6Apr 09
0R8555 0R8556 0R8557 0R8842 OR9557 0R9558 0R9845 10R6702	S/N:7DS01017-UP	1Apr 10
0R8550 0R8551 0R8552 0R8553	S/N:5XS01011-UP	1Apr 10
0R8554	S/N:6SS00221-UP	1Apr 10
0R9842	S/N:KAM00333-UP	1Apr 10
OR9840	S/N:BTB00268-UP	1Apr 10
0R9841 10R5596	S/N:BTR00505-UP	1Apr 10
0R9843	S/N:BWA00188-UP	1Apr 10
0R9844 10R6700	S/N:SDW00358-UP	1Apr 10

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Table 3
3500A (SS)
10R4377
Arrangement #	Effective Serial Number	Date
0R3983 0R9583 0R3959 0R9659	S/N:7CL02023-UP	1Apr 10
0R3980 0R3981	S/N:5TL01027-UP	1Apr 10
0R3982	S/N:6FL00953-UP	1Apr 10
0R3953 0R3954	S/N:6CL00637-UP	1Apr 10
0R3953 0R3954	S/N:6CL00637-UP	1Apr 10
0R3952	S/N:5EL00416-UP	1Apr 10
0R3950 0R3951	S/N:4ZL01441-UP	1Apr 10