2014/03/07 Caterpillar

Improved Alternator Mounting Groups Are Now Used on Certain C15 and C18 Engines {1154, 1405}

Usage:

C-15 BEM

Industrial Engine: C-15 (S/N: BEM1-UP) C15 (S/N: JRE1-UP; MCW1-UP) C18 (S/N: WJH1-UP; WRH1-UP)
Petroleum Engine: C15 (S/N: JDK1-UP; JDY1-UP) C18 (S/N: WJW1-UP; WJY1-UP)

Description of Change: The new engine alternator mounting groups are used to help prevent vibration damage present in the current alternator mounting group design.

Adaptable To: The old and new groups are listed in Table 1

To view the procedures to change to the new alternator mounting groups, refer to Special Instruction, REHS9215, "Procedure to Replace the Current Alternator Mounting Groups with Improved Alternator Mounting Groups on Certain C15 and C18 Engines".

Note: If the engine in question has a support assembly that is not cast iron, the following additional parts will have to be ordered, 6L-7283 Bolt, 7X-0339 Bolt and 9S-8752 Full Nut

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Table 1
Old Part Number	New Part Number	Description	Old Group	New Group	Description
-	437-7746	Mount	-	-	-
-	444-6549	Rod As	-	-	-
332-4697	444-6557	Support As	118-3419	449-4904	Alternator Mounting Gp
9L-5134	444-7009	Rod	270-8444	444-6556	Alternator Mounting Gp
7E-6879	449-4906	Rod	135-5077	449-4905	Alternator Mounting Gp
5R-2994	451-8195	Rod	9E-6169	451-7227	Alternator Mounting Gp

The improved alternator groups are adaptable back to the first production of the listed engines.

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

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Table 2
Serial Numbers Effective at the Factory
S/N:BEM07172-UP
S/N:JDK00571-UP
S/N:JDY00707-UP
S/N:JRE14640-UP
S/N:MCW06600-UP
S/N:WJH09627-UP
S/N:WJW00297-UP
S/N:WJY00640-UP
S/N:WRH05407-UP