A New Aftercooler Is Used on Certain C9 Marine Engines {1063} Caterpillar

Engine

C9 (S/N: C9Y1-UP)

Generator Set

C9 MARINE GEN (S/N: SJB1-UP)

C9 MARINE GS (S/N: C9A1-UP)

Marine Engine

C9 MARINE (S/N: C9B1-UP; CSN1-UP; X9X1-UP; Z9X1-UP; X9Y1-UP)

Engine News, SEBD9688, 10, January 2011, "A New Aftercooler Is Used on Certain C9 Marine Engines". Disregard this article. Refer to the article that follows.

Description Of Change: The new aftercooler design improves reliability and durability though use of the proven shell and tube technology. This design offers a more compact package without affecting engine performance while improving the serviceability of the aftercooler core and the crankcase breather. In addition, the new aftercooler is approximately 80 lbs lighter than the previous design.

Adaptable To:

Table 1

Effective Serial Numbers

S/N:C9Y00252-UP

S/N:SJB01032-UP

S/N:X9Y00587-UP

The change is effective at the factory with the serial numbers that are listed in Table 1.

Table 2

Serial Numbers That Require an Aftercooler Repair Kit if the New Aftercooler Is Desired

S/N:C9A1-UP

S/N:C9B1-UP

S/N:C9Y1-251

S/N:SJB1-1031

S/N:X9Y1-586

S/N:CSN1-UP

S/N:X9X1-UP

S/N:Z9X1-UP

The new 303-8551 Raw Water Aftercooler Gp is adaptable back to the first production of the listed engines.

An aftercooler repair kit is available for all listed serial numbers in Table 2.

Table 3

List of Replacement Aftercoolers and Kits for Selected Serial Number Prefixes
Old Part Number	New Part Number	Description	C9 Marine Group	Serial Number Prefix
199-6887	303-8551	Raw Water Aftercooler Gp	Propulsion HEX Cooled Conversion Group	C9B, CSN, X9X, X9Y, Z9X
	361-3638	Aftercooler Repair Kit
242-5336	303-8551	Raw Water Aftercooler Gp	Auxilary/Gen. Set HEX Cooled Conversion Group	SJB, C9A, C9Y
	361-3639	Aftercooler Repair Kit
242-5336	303-8551	Raw Water Aftercooler Gp	Auxilary/Gen. Set Keel Cooled Conversion Group	SJB, C9A, C9Y
	361-3640	Aftercooler Repair Kit

Refer to Table 3 in order to find the correct replacement aftercooler and kit for the serial number prefix in question.