2014/06/13 Caterpillar

Engine:

3612 (S/N: NZA1-UP; 9RC1-UP)

3616 (S/N: 1PD1-UP; RMN1-UP; 1FN1-UP)

C280-16 (S/N: NKB1-UP; TDX1-UP)

Marine Engine:

C280-12 (S/N: TSJ1-UP; RDW1-UP)

Engine News SEBD9655, 17 June 2010, "A New Air Shutoff Gp Is Used on Certain C280 and 3600 Engines". Disregard this article. Refer to the article that follows. Added Operation and Maintenance Manual information.

Description of Change: The new air shutoff gp has an increased service life over the existing group. The new air shutoff gp includes improvements to the internal mechanism that triggers the shutoff.

Adaptable To: The new 352-2419 Air Shutoff Gp is a direct replacement for the former 317-9554 Air Shutoff Gp which is canceled. The new air shutoff gp is adaptable to the serial numbers that are listed above back to first production.

Note: The new air shutoff gp has a minimum supply pressure of 1100 kPa (160 psi) and a maximum supply pressure of 1720 kPa (250 psi).The new air shutoff must be operated upon installation. Refer to the Operation and Maintenance Manual, "Maintenance Interval Schedule" for the correct maintenance and service intervals.

This change is effective for the serial numbers that are listed in Table 1.

Table 1

Effective Serial Numbers

S/N:9RC00519-UP

S/N:1PD00655-UP

S/N:RDW00149-UP

S/N:TSJ00132-UP

S/N:NKB00189-UP

S/N:TDX00156-UP