2010/12/13 Caterpillar

The Air Starting Motor Group Is Now Improved on Certain C9 and C18 Engines {1451}

Usage:

C18 C1J

Engine: C9 (S/N: C9Y1-UP)
Generator Set: C18 MARINE GS (S/N: CYN1-UP; GEN1-UP; MGS1-UP) C9 MARINE GS (S/N: C9A1-UP)
Marine Engine: C18 MARINE (S/N: WKB1-UP; PLE1-UP; C1J1-UP; GES1-UP) C18 MARINE ENG (S/N: J2K1-UP; T2P1-UP)

Description of Change: The design of the air starting motor group has been improved by reducing the inner diameter of the spacer. The improved air starting motor group reduces the heat generated by the lip type seal and hence increases the performance of the motor assembly. The improved air starting motor group has high durability and reliability.

Adaptable To:

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Illustration 1	g02348556
Typical example (3) 4N-4393 Lip Type Seal (4) 4N-4402 Spacer

The 246-3277 Motor As (2) is part of the 246-3274 Air Starting Motor Gp (1) and the 261-1552 Air Starting Motor Gp .

The improved 246-3277 Motor As (2) is adaptable to and is effective in production for the machines that are listed in the Table 1.

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Table 1
Sales Model	Adaptable Serial Number	Effective Serial Number
C9	S/N:C9A1-989	S/N:C9A990-UP
C9	S/N:C9Y1-169	S/N:C9Y170-UP
C18	S/N:C1J1-UP	-
	S/N:CYN1-UP	-
	S/N:GEN1-UP	-
	S/N:GES1-188	S/N:GES189-UP
	S/N:J2K1-262	S/N:J2K263-UP
	S/N:MGS1-855	S/N:MGS856-UP
	S/N:PLE1-UP	-
	S/N:T2P1-595	S/N:T2P596-UP
	S/N:WKB1-UP	-