ACTUATOR AS 1C4320 - Caterpillar

March 20, 2003
U-71
A-53
D-54
O-65
Partsstock action only PRODUCT IMPROVEMENT PROGRAM FOR INSPECTINGALL 1115059 AFTERCOOLER CORES WITH DATE CODES PRIOR TO 02339 AND POSSIBLYREMOVING THEM FROM DEALER PART STOCK
7750 PI70055
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
June 30, 2003PROBLEM
All 1115059 Aftercooler Cores with date codesprior to 02339 must be inspected to determine whether or not they shouldbe removed from dealer part stock. If the aftercooler cores are used thereis the potential of having an aftercooler core failure during engine operationand possibly causing engine damage.ACTION REQUIRED
Inspect loose aftercooler cores within dealerinventory per the rework procedure. Remove aftercooler cores from inventoryif and only if the aftercooler core meets the guidelines called out withinthe rework procedure. See Rework Procedure.SERVICE CLAIM ALLOWANCES
Submit one claim for all 1115059 removed fromparts stock.PARTS DISPOSITION
All dealers are to make sure the outsideof the shipping container is marked PI70055.***** U.S. and Canadian Dealers *****Return all 1115059 that are removed from partsstock and a copy of the claim to:Caterpillar Inc.
Attn: Supplier Recovery PI70055
Service Claims Room
8201 N. University
Peoria, IL 61615
Handle the parts in accordance with your WarrantyBulletin on warranty parts handling.
Attach. (1-Rework Procedure)Rework Procedure
It is necessary to first locate the five digitJulian date code which is located below the Cat part number as seen inIllustration 1. This information will be located near one of the ends ofthe aftercooler core as shown in Illustration 2.
If and only if the Julian date code is prior to02339 will you continue the inspection process.
If the inspection must proceed then it will benecessary to view the bottom water passage from the aftercooler core endtank water inlet/outlet area. See Illustration 2.
Since only the bottom water passage is visiblethrough the end tank water inlet/outlet please refer to the bottom waterpassage for the sort criteria.
The aftercooler cores bottom water passage mayhave a diagonal fin present when looking into the end tank.
If you can see a large water fin passage witha diagonal fin in any of the bottom passages as seen in Illustration 3then the aftercooler core has a small "L" shaped water fin passage on thetop portion of the core and may fail.
If the aftercooler core looks like Illustration3 or 4 then it is required that the dealer remove it from their inventoryand return it for a replacement aftercooler core.
If the dealer can see a small water fin passageor an "L" shaped water fin on the bottom portion of the aftercooler coreas seen in Illustration 5 then the core has the preferred water fin orientaiton.
The cores similar to what is seen in Illustration5 do not have to be removed from dealer inventory and can be used.
If the aftercooler core has a Julian date codepast 02339 then it is not necessary to inspect or replace the aftercoolercore.
Illustration 1Illustration 2Illustration 3Illustration 4Illustration 5