2007/06/25 Caterpillar

Engine:

3512B (S/N: PWG1-UP; 3ZW1-UP)

Description of Change: New high temperature hardware is used in order to improve the joint between the turbocharger and the exhaust manifold.

Adaptable To: The following turbocharger groups have been improved:

• 146-3739 Turbocharger Gp

• 207-1352 Turbocharger Gp

• 253-6223 Turbocharger Gp

• 145-7984 Turbocharger Gp

Table 1 lists the new parts and the former parts for the turbocharger groups.

Table 1

Former Parts and New Parts
Former Part	New Part	Description	Quantity
2N-2766	310-2233	Full Nut	8
269-0187	300-8579	Bolt	8
173-2090	298-6389	Spacer	8
8C-8491	284-0753	Washer	8

The improvements are adaptable to the engines that are listed above. Serial number effectivity is listed in Table 2.

Table 2

Serial Number Effectivity
Sales Model	Serial Number
3512B	S/N:3ZW00859-UP
3512B High Displacement	S/N:PWG00203-UP