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Product: TRUCK ENGINE

Model: C15 TRUCK ENGINE NXS

Configuration: C15 On-Highway Truck NXS00001-UP

Truck Engine News 2010/03/09 Media Number -SEBD6836-00 Publication Date -09/03/2010 Date Updated -09/03/2010

i03871890

An Improved Stud Is Now Used for the Variable Valve Actuator {1130}SMCS - 1130

Engine:

C15 (S/N: SDP1-UP; MXS1-UP; NXS1-UP)

Truck Engine News SEBD6820, February 2009, "An Improved Stud Is Now Used for the Variable Valve Actuator ". Disregard this article. See the article that follows.

Description of Change: An improved stud is used on the engines that are listed above. The new stud has an "elliptical fillet" underhead with "J" threads. The new stud has increased durability.

Adaptable To: The 304-9553 Stud is a direct replacement for the 233-3672 Stud and the 288-4109 Special Stud. The improved stud is adaptable back to the first production of the listed engines. The change is effective at the factory with the engine serial numbers SDP21692-UP and NXS32162-UP.

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Illustration 1 g01829373

Old 233-3672 Stud and 288-4109 Special Stud

Illustration 2 g01829414

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The improved 304-9553 Stud

(1) Elliptical Fillet

Caterpillar recommends replacing all of the studs with the improved 304-9553 Stud if a 233-3672 Stud or a 288-4109 Special Stud fails. Refer to Illustration 1 and Illustration 2.

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