F510746-2 Force FUEL PUMP COVER

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PSP FOR REPAIRING THE 9N3723 FAN DRIVE GROUP ON CERTAIN 3406B TRUCK ENGINES - PS4501 - MAILED US AND CANADA, COSA, TRUCK TEP S
  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.
U-186 O-146 TT-12 1359 PS4501 This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4501" as Part Number, "7755" as Group Number, and "96" as Description Code. Termination Date
September 30, 1991
Problem
The fan drive on certain 3406B Truck Engines may not have the correct amount of bearing clearance. Improper clearance could cause the service life of the fan drive to be shortened.
Affected Product
Model Identification Number 3406B* 4MG80625-90155 8TC11172-11205 * If equipped with a 9N3723 Drive Group-Fan which is part of the 9W9292 Drive Group-Fan Belt (an attachment).
Parts Needed
Before Failure 1 - 7F2122 Seal-O-ring 2 - 8H9789 Ball Bearing 1 - 9N2116 Bracket Assembly-Fan 1 - 5S2106 Seal-Lip Type After Failure 1 - 9N3723 Drive Group-Fan
Action Required
Before Failure Loosen the belts and inspect for end clearance. Repair the fan group if end clearance is measurable. After Failure Replace the fan drive group. ****** IMAGE: SEBE4403.00001.001 CAPTION: 9N3723 Drive Group-Fan (Part of 4W9292 9W9292 Drive Group-Fan Belt - an attachment)
Service Claim Allowances
Product Caterpillar Dealer Suggested Customer Suggested smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. (C/L) (Sell) 0-100,000 100% 3 0 0 0 0 Miles This is a 3-hour job.
Parts Disposition
Any parts removed (with the exception of cores used for Caterpillar Remanufactured parts) can be rendered useless and scrapped immediately upon completion of the repair.