PLUG-SQUARE 9U7100 - Caterpillar

January 7, 2003
(Revised March 2003)
U-8
A-5
D-4
O-6
Parts stock action only
PRODUCT IMPROVEMENT PROGRAM FOR REMOVINGCERTAIN 2J9630, 2G9349, 2G9350, 5K4985, 5K4986, 8D6138, 8D6139, AND 5T0975BRAKE CAMSHAFTS FROM DEALER PARTS STOCK
7750 PI70053
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. This Revised Service Letter replacesthe January 7, 2003 Service Letter. Changes have been made to add 2J9630,2G9349, 2G9350, 5K4985, and 5K4986 Camshafts to this program.TERMINATION DATE
April 30, 2003PROBLEM
Certain 2J9630, 2G9349, 2G9350, 5K4985, 5K4986,8D6138, 8D6139, and 5T0975 Brake Camshafts may not have received the properheat treat. These camshafts need to be removed from dealer parts stock.ACTION REQUIRED
A visual inspection can be used to separate certainnon-conformance pieces from good pieces. If a well defined dark ring ispresent on the end of the camshaft then the shaft is non-conforming. Referto the Illustration 1. If the ring is not present, then hardness test mustbe performed. Illustration 1
If the well defined dark ring is not presentthen a hardness test can be performed in order to determine conformance.Refer to the Illustration 2 for the location where a hardness test canbe performed. The part is good if the hardness level is above RK C 55. Illustration 2
SERVICE CLAIM ALLOWANCES
Submit one claim for all 2J9630, 2G9349, 2G9350,5K4985, 5K4986, 8D6138, 8D6139, and 5T0975 Brake Camshafts removed fromdealer parts stock.PARTS DISPOSITION
Handle the parts in accordance with your WarrantyBulletin on warranty parts handling.