2011/06/27 Caterpillar

Wheel Tractor-Scraper:

621G (S/N: DBB1-UP)

623G (S/N: DBC1-UP)

627G (S/N: DBD1-UP; DBZ1-UP)

631G (S/N: DFA1-UP)

637G (S/N: DFJ1-UP; DEX1-UP; DEY1-UP)

657G (S/N: W1B1-UP; W1C1-UP; W1E1-UP; W1F1-UP; GER1-UP)

Service Magazine SEPD0938, April 2008, "New Engine Software Is Now Used". Disregard the article. Refer to the article that follows. A note has been added in order to include information about a password request form.

Description of Change: New software is now used on the machines that are listed above. The new software contains improvements in the detection, warning, and engine derate that is associated with the pressure drop across the engine air filter.

The new software is adaptable back to the first production of the above listed machines.

Note: A password request form must be submitted through the Dealer Solution Network (DSN) in order to obtain factory passwords before the new software can be installed.

Adaptable To:

Table 1

New Flash files
Effectivity	Part number	Description
S/N:DBB S/N:DBC S/N:DBD	312-2917	Engine Ratings Electronic Software Gp
S/N:DBZ	305-3440	Engine Ratings Electronic Software Gp
S/N:DEX S/N:DEY	305-3461	Engine Ratings Electronic Software Gp
S/N:DFA S/N:DFJ	327-1003	Engine Ratings Electronic Software Gp
S/N:W1E S/N:GER	302-8858	Engine Ratings Electronic Software Gp
S/N:W1B S/N:W!C S/N:W1F	327-2227	Engine Ratings Electronic Software Gp

Refer to Table 1 in order to flash the latest software into the machine that is in question.

Table 2

Serial Numbers with the Latest Software
(S/N: DBB00423, 00425-00430, 00432-00476, 00478-UP)
(S/N: DBC00317-UP)
(S/N: DBD00516-00518, 00520-UP)
(S/N: DBZ00526, 00529-00577, 00579-UP)
(S/N: DEX00291, 00293-UP)
(S/N: DEY00208-UP)
(S/N: DFA00335-UP)
(S/N: DFJ00368-UP)
(S/N: W1B00128-UP)
(S/N: W1C00271-UP)
(S/N: W1E00306, 00308-UP)
(S/N: W1F00154-UP)
(S/N: GER00101-UP)

The machine serial numbers that are listed in Table 2 will have been flashed with the latest software at the factory.