2010/09/14 Caterpillar

New O-Rings Are Used with the Plugs for the Fuel Passages in 3500 Engines {1100, 1101, 1252, 1254}

Usage:

Engine: 3512B (S/N: MHA1-UP; BRC1-UP; 2AF1-UP; 8DF1-UP; PWG1-UP; S2G1-UP; S2H1-UP; S2J1-UP; S2K1-UP; S2L1-UP; S2M1-UP; 7HM1-UP; 8EM1-UP; 8RM1-UP; BRN1-UP; S2N1-UP; 4TN1-UP; 1PW1-UP; 2GW1-UP; 3ZW1-UP; 2EZ1-UP; 1GZ1-UP) 3512C (S/N: LLA1-UP; R1A1-UP; LLB1-UP; TTC1-UP; TTE1-UP; LLF1-UP; TTF1-UP; TTG1-UP; MLM1-UP; SLM1-UP; NJT1-UP; E3W1-UP; E3X1-UP; E3Y1-UP) 3516B (S/N: CDE1-UP; B5G1-UP; BCK1-UP; LEK1-UP; CAN1-UP; CBN1-UP; 7RN1-UP; 8CN1-UP; 8KN1-UP; 9AN1-UP; S2P1-UP; GAR1-UP; PBR1-UP; S2R1-UP; ZAR1-UP; GZS1-UP; S2S1-UP; S2T1-UP; YAT1-UP; S2W1-UP; YAW1-UP; 2FW1-UP; 3CW1-UP; 4BW1-UP; S2X1-UP; GZY1-UP; S2Y1-UP; 6HZ1-UP) 3516C (S/N: PRC1-UP; TTD1-UP; TTH1-UP; SBJ1-UP; SCJ1-UP; TTJ1-UP; JTS1-UP; PES1-UP; T2X1-UP; E3Z1-UP)

Description of Change: The new O-rings are made with a material that is better able to withstand high temperatures. The new O-rings retain elasticity and provide a longer service life.

Adaptable To: Use the new 214-7566 O-Ring Seal in place of the original 3J-7354 O-Ring Seal, which is not canceled.

If a 3J-7354 O-Ring Seal is found to be brittle, install a 214-7566 O-Ring Seal .

Also use the 214-7566 O-Ring Seal when a cylinder head is overhauled or when the engine is overhauled.

Locations of the plugs and the O-ring seals in the cylinder heads are shown in Illustrations 1 and 2. Effectivity is listed in Table 1.

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Illustration 1	g02254753
(1) Location of the plug and O-ring seal

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Illustration 2	g02254755
(1) Locations of the plugs and O-ring seals

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Table 1
Effectivity for the 214-7566 O-Ring Seal
3512B
S/N:1GZ00245
S/N:1PW00456
S/N:2AF00755
S/N:2EZ00376
S/N:2GW00432
S/N:3ZW01120
S/N:4TN00868
S/N:6EF00362
S/N:7HM00271
S/N:8DF00197
S/N:8EM00562
S/N:8RM00951
S/N:BRC00194
S/N:BRN00197
S/N:MHA00159
S/N:MKH00261
S/N:MRG00104
S/N:PWG00231
S/N:S2G00318
S/N:S2H00526
S/N:S2J00742
S/N:S2K00333
S/N:S2L00919
S/N:S2M00203
S/N:S2N00130
S/N:SPM00002
3512C
S/N:E3W00207
S/N:E3X00233
S/N:E3Y00002
S/N:LLA02335
S/N:LLB00113
S/N:LLF00371
S/N:MLM00130
S/N:NJT00109
S/N:R1A00625
S/N:SLM00236
S/N:TTC00427
S/N:TTE00204
S/N:TTF00405
S/N:TTG00239
3512C HD
S/N:F2X00113
S/N:LLK00002
S/N:R1S00152
3516B
S/N:2FW00424
S/N:3CW00258
S/N:3XS00408
S/N:4BW00519
S/N:6HZ00230
S/N:7RN12040
S/N:8CN00212
S/N:8KN00588
S/N:9AN00412
S/N:B5G00102
S/N:BCK00374
S/N:CAN00139
S/N:CBN00499
S/N:CDE00002
S/N:E5P00002
S/N:E6P00102
S/N:GAR00203
S/N:GZS00895
S/N:GZX00125
S/N:GZY00137
S/N:LEK00154
S/N:PAG00481
S/N:PBR00669
S/N:RKT00168
S/N:S2P00248
S/N:S2R00687
S/N:S2S00488
S/N:S2T00112
S/N:S2W00139
S/N:S2X01626
S/N:S2Y00117
S/N:YAT00396
S/N:YAW00200
S/N:ZAP01525
S/N:ZAR00672
3516B HD
S/N:S2Z00433
3516C
S/N:E3P00002
S/N:E3Z00202
S/N:JTS00166
S/N:PES00384
S/N:PRC00002
S/N:SBJ01103
S/N:SBK00996
S/N:SCJ00115
S/N:T2X00123
S/N:TTD00352
S/N:TTH00262
S/N:TTJ00294
3516C HD
S/N:SBM00158
S/N:SCK00117
S/N:SDX00108