2004/07/01 Caterpillar

Engines Are Now Built with Semi-Crowned Lifter Rollers {1209}

Usage:

Caterpillar Products: All
3500B Engines

Description of Change:

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Illustration 1	g01082028
Valve lifter assembly (1) Lifter body (2) Lifter roller

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Illustration 2	g01082029
Injector lifter assembly (1) Lifter body (2) Lifter roller

Engines are now built with semi-crowned lifter rollers. Semi-crowned rollers significantly reduce the stress on each lobe of the cam.

Adaptable To: All 3500B commercial engines are now built with semi-crowned rollers in the injector and valve lifter assemblies. All 3500B engines must now use the new parts. Refer to the part numbers for the lifter assemblies in Table 1.

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Table 1
Part	New Part Number	Cancelled Part Number
Injector Lifter As	197-7004	192-8747
Injector Lifter As	10R1349	0R1368
Valve Lifter As	230-7875	192-8746
	230-7875	229-5490
	10R1903	0R1350
	10R1903	10R1505

Tables 2, 3 and 4 list the effectivity of the new lifter assemblies.

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Table 2
Effective Serial Numbers
3508
S/N:1FZ02132
S/N:1TW00359
S/N:2MB00188
S/N:2HW00263
S/N:3DM00478
S/N:3DW00178
S/N:4GM00743
S/N:5PS00321
S/N:6PN00886
S/N:7SM00977
S/N:BPX00101
S/N:CBB00213
S/N:CTC00256
S/N:2SB00108
S/N:2SD00104
S/N:2SE00130

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Table 3
Effective Serial Numbers
3512
S/N:1GZ01825
S/N:1PW00440
S/N:2AF00389
S/N:2EZ00356
S/N:2GW00420
S/N:3HD00279
S/N:3KD00279
S/N:3ZW00557
S/N:4AW00873
S/N:4TN00828
S/N:5AW00137
S/N:6WN00803
S/N:7HM00270
S/N:8DF00187
S/N:8EM00527
S/N:8RM00759
S/N:BRC00158
S/N:BRN00195
S/N:CTB00190
S/N:CTH00279
S/N:PWG00117
S/N:2SH00111
S/N:2SJ00112
S/N:2SK00106
S/N:2SL00140
S/N:2SM00104

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Table 4
Effective Serial Numbers
3516
S/N:1HZ02645
S/N:1NW00145
S/N:2FW00338
S/N:2JW00412
S/N:3CW00258
S/N:4BW00571
S/N:6HN01720
S/N:7RN01953
S/N:8CN00212
S/N:8KN00579
S/N:9AN00373
S/N:9WF00118
S/N:BCK00284
S/N:CAN00111
S/N:CBN00322
S/N:CDE00313
S/N:CTA00153
S/N:CTG00287
S/N:CTJ00200
S/N:S2S00106
S/N:S2X00117
S/N:S2Y00104