PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REWORKING REMANUFACTURED 3508, 3512, 3516, AND 3524 CYLINDER HEADS (10R7765) THAT HAVE BEEN RECEIVED AT DEALERSHIPS WITH INCORRECT VALVE SPRINGS, ROTOCOILS, AND WASHERS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REWORKING REMANUFACTURED 3508, 3512, 3516, AND 3524 CYLINDER HEADS (10R7765) THAT HAVE BEEN RECEIVED AT DEALERSHIPS WITH INCORRECT VALVE SPRINGS, ROTOCOILS, AND WASHERS

Usage:

REBE5113-00

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01May2009

U-173

A-150

D-145

O-153

TM-14

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*Parts stock action only*	PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REWORKING REMANUFACTURED 3508, 3512, 3516, AND 3524 CYLINDER HEADS (10R7765) THAT HAVE BEEN RECEIVED AT DEALERSHIPS WITH INCORRECT VALVE SPRINGS, ROTOCOILS, AND WASHERS
7750		PI70302

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NOTE:

When submitting claim for Parts Stock Action, Use the appropriate 99Z as the s/n, the appropriate Service Letter Program Number as the Part number in the Part Causing Failure field, "7751" as the Group Number, "56" as the Description Code.

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NOTE:

The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.

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TERMINATION DATE

31Aug2009

PROBLEM

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Some 10R7765 cylinder heads were built with incorrect valve springs, rotocoils, and washers. The affected parts will be stamped with a date code ranging from "005 09 E" to "020 09 E". The correct parts will have improved reliability.

ACTION REQUIRED

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1. Inspect package labels to determine if the cylinder head was manufactured in the United Kingdom. Refer to Image1. If the package label indicates the cylinder head was not manufactured in the United Kingdom, the cylinder head can be returned to dealer parts stock.

2. If the 10R7765 cylinder head package label indicates it was manufactured in the United Kingdom, remove the head and inspect the date code. Refer to Images2 and Image3 for the location and date code stamp. The affected date code range is from "005 09 E" to "020 09 E". If the first three digits are between "5" and "20", the head must be reworked.

3. Refer to SENR1126 Disassembly and Assembly - 3500B Engines for Caterpillar Built Machines" as a guide, and disassemble the head. The four (4) 197-7055 Retainers, the four (4) 2A-4429 Retainers , the two (2) 194-4897 Exhaust Valves , and the two (2) 210-2542 Intake Valves will all be reused. Do not discard.

4. Reassemble the head with the parts included in the Parts Needed chart (Image5). Refer to Media Number SENR1126 - "Disassembly and Assembly - 3500B Engines for Caterpillar Built Machines"

NOTE: The correct 316-5976 Outer Valve Spring is identified with a yellow stripe, that may appear to be light green, on the spring (Image4). The incorrect outer valve spring (not shown), that needs replaced, is marked with a white stripe.

The date code of the head reworked must be included in the parts claim story for warranty to be paid and to ensure all affected heads are reworked to the proper engineering level.

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