2012/05/14 Caterpillar

Generator Set:

3406C GEN SET (S/N: C5G1-UP)

C15 GEN SET (S/N: C5E1-UP; C5H1-UP)

C18 GEN SET (S/N: STM1-UP; EKW1-UP)

C9 GEN SET (S/N: C9E1-UP)

Description of Change: The clarified commissioning instructions listed below are to ensure that the contactor is supplied with the correct voltage. The new commissioning instructions eliminate the failure of the contactor due to either an over or under voltage condition.

• If the unit is wired with fuses then the input voltage must be 240 V Line to Neutral (2-wire). This is typically in 50 Hz regions.

• If the unit has circuit breakers then the input voltage must be wired to 240 V Line to Line (3-wire). Typically 60 Hz North America.

• Production changed to 24 VDC control scheme eliminating the opportunity for incorrect selection of voltage options.

Adaptable To: The contactor part number is listed in Table 1.

Table 1

Qty	Part Number	Description
1	169-0235	Contactor

The new commissioning instructions to ensure correct voltage applied to the 169-0235 Contactor is adaptable to and effective with the serial numbers that are listed in Table 2.

Table 2

Model	Adaptable Serial Number	Effective Serial Number
3406C GEN SET	C5G1-3724	C5G3725- Up
C15 GEN SET	C5E1-3120	C5E 3121-Up
	C5H1-1852	C5H1853-Up
C18 GEN SET	EKW1-1340	EKW1341-Up
	STM1-1776	STM1777-Up
C9 GEN SET	C9E1-2404	C9E2405-Up