2010/09/22 Caterpillar

New Engine Speed Sensors Are Now Used On Certain Generator Sets {1907}

Usage:

C4.4 D4D

Electric Power Generation: C4.4 GEN SET (S/N: NCD1-UP; XYC1-UP; D4D1-UP; N4D1-UP; XYD1-UP; GLE1-UP; N4R1-UP; N4X1-UP) C1.5 GEN SET (S/N: GBD1-UP; NCA1-UP) C2.2 GEN SET (S/N: GBE1-UP; NCB1-UP; XYE1-UP) C3.3 GEN SET (S/N: X3B1-UP; NCC1-UP; N3X1-UP) C6.6 GEN SET (S/N: MRW1-UP)

Description of Change: New sensors are now used on the Generator Sets that are listed above. The new sensors have improved signal strength.

Adaptable To: The sensors in Table 1 are adaptable to the Generator Sets that are listed above. Refer to Table 1 for direct replacement information. A Deutsch connector must be added to the harness with the use of the new sensors.

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Illustration 1	g02150123
Old Sensor

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Illustration 2	g02150124
New Sensor

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Table 1
Speed Sensors
Original	Replacement
220-1557 Speed Sensor	116-6680 Speed Sensor
249-4019 Speed Sensor	357-3053 Speed Sensor Gp

The sensors are effective with the Generator Sets that are listed in Table 2.

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Table 2
Effective Serial Numbers
Sales Model	Serial Number Range
C4.4 GEN SET	S/N:NCD1180-UP
	S/N:XYC681-UP
	S/N:D4D773-UP
	S/N:N4D1200-UP
	S/N:XYD646-UP
	S/N:GLE772-UP
	S/N:N4R403-UP
	S/N:N4X480-UP
C1.5 GEN SET	S/N:GBD225-UP
C1.5 GEN SET	S/N:NCA429-UP
C2.2 GEN SET	S/N:GBE395-UP
C2.2 GEN SET	S/N:NCB601-UP
C3.3 GEN SET	S/N:X3B211-UP
	S/N:NCC165-UP
	S/N:N3X378-UP
C6.6 GEN SET	S/N:MRW204-UP