2012/11/30 Caterpillar

New Engine Software Is Used on Certain C27 and C32 Industrial Engines {1901, 1920}

Usage:

C32 TLD

Industrial Engine: C27 INDUSTRIAL (S/N: TWM1-2362) C32 INDUSTRIAL (S/N: TLD1-UP)

Engine News SEBD9806, 30 August 2012, "New Engine Software Is Used on Certain C27 and C32 Industrial Engines". Disregard the previous article. The effectivity has been changed. Refer to the article that follows.

Description of Change: New engine software is used on certain C27 and C32 Industrial Engines. The new software increases the fuel at engine startup when ambient temperatures are 5° C (41° F) to 10° C (50° F)

Adaptable To: The new software is a direct replacement for the current software part number. Refer to Table 1 for the correct software part number.

Note: This new engine software is not for use with a CX Transmission.

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Table 1
Engine Model	Part Number	Part Description
C27	391-9920	Engine Ratings Electronic Software Gp
C32	391-9926	Engine Ratings Electronic Software Gp

The change is effective at the factory with the serial numbers that are listed in Table 2.

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Table 2
Effective Serial Number Prefixes
S/N:TLD01005-UP

Note: Do not use the 391-9920 Engine Ratings Electronic Software Gp for the C27 Industrial TWM02363-UP since those engines utilize a different Electronic Software Gp.