2008/07/14 Caterpillar

Caterpillar Products:

3500 Family Generator Sets and Power Modules

3500 Family Pumpers

3500C Engines

Engine: Commercial

3500 and 3500B Family All

Description of Change: New piston assemblies have an improved cover plate. The new plate is designed with new geometry that improves retention of the plate.

Adaptable To:

Illustration 1	g01603234
Section view of piston (1) 298-0306 Cover Plate

• The 282-0644 Piston has been cancelled and replaced by the 314-5005 Piston .

• The 278-0247 Piston has been cancelled and replaced by the 299-5204 Piston .

• The 281-6140 Piston has been cancelled and replaced by the 314-5006 Piston .

• The 285-1993 Piston has been cancelled and replaced by the 314-5007 Piston .

The former parts and the new parts are listed in Table 1.

Table 1

Former Parts and New Parts
Piston and Rod Gp	Former Part	New Part
282-0645 Piston and Rod Gp	282-0644 Piston	314-5005 Piston
281-6139 Piston and Rod Gp	278-0247 Piston	299-5204 Piston
281-6141 Piston and Rod Gp	281-6140 Piston	314-5006 Piston
282-9965 Piston and Rod Gp	285-1993 Piston	314-5007 Piston

The new pistons are adaptable to the 3500 Engines that are listed above. Serial number effectivity is listed in Table 2.

Table 2

Serial Number Effectivity
Model	Serial Number
3508B	S/N:2GR08218-UP
3512B	S/N:8BR02116-UP
3516B	S/N:7TR02377-UP