105636-2460 ZEXEL 9 420 617 127 BOSCH AUTOM. ADVANCE MECHANISM 9420617127 1056362460

November 10, 2003
U-307
A-211
D-227
O-256
TT-24
TM-7
Partsstock action only PRODUCT IMPROVEMENT PROGRAM FOR REMOVINGCERTAIN REMAN FUEL INJECTORS FROM DEALER PART STOCK
7750 PI70071
The information supplied in this serviceletter may not be valid after the termination date of this program. Donot perform the work outlined in this Service Letter after the terminationdate without first contacting your Caterpillar product analyst.TERMINATION DATE
February 29, 2004PROBLEM
Certain fuel injectors need to be removed fromdealer part stock. A number of fuel injectors were built with a Valve OpeningPressure (VOP) spacer that missed a hardening operation. This non-hardenedspacer allows premature wear, causing several operational problems whichmay include: engine misfire, low power, white smoke, and engine would notstart.ACTION REQUIRED
Only remove engine injectors within the suspectdate code range from your parts supply.
In order to perform this inspection, injectorsmust be removed from the packaging.
Repackage all injectors.
Illustration 1 (3406E, C15) Illustration 2 (C10, C12)SERVICE CLAIM ALLOWANCES
Submit one claim for all 0R4667, 0R4893, 0R4894,0R4895, 0R9256, 0R9257, 0R9258, 0R9259, 0R9803, 0R4986, 0R4987, 0R4988,0R7549, 0R8773, 0R8780, and 0R9530 removed from parts stock. Remove onlythose injectors from the suspect serial number range listed below. 0R4667, 0R4893, 0R4894, 0R4895, 0R9256,0R9257, 0R9258, 0R9259, and 0R9803 3406E and C15 injectors should be removedif the serial number is between 318224-371662. 0R4986, 0R4987, 0R4988, 0R7549, 0R8773,0R8780, and 0R9530 C10 and C12 injectors should be removed if the serialnumber is between 34768-47935.PARTS DISPOSITION
These remanufactured parts need to be returnedwith dealer normal core returns in order to allow for core deposit refund.