PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING ALL 1115059 AFTERCOOLER CORES WITH DATE CODES PRIOR TO 02339 AND POSSIBLY REMOVING THEM FROM DEALER PART STOCK Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING ALL 1115059 AFTERCOOLER CORES WITH DATE CODES PRIOR TO 02339 AND POSSIBLY REMOVING THEM FROM DEALER PART STOCK

Usage:

SEBE8320

March 20, 2003
U-71
A-53
D-54
O-65

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*Parts stock action only*	PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING ALL 1115059 AFTERCOOLER CORES WITH DATE CODES PRIOR TO 02339 AND POSSIBLY REMOVING THEM FROM DEALER PART STOCK
7750		PI70055

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.

TERMINATION DATE

June 30, 2003

PROBLEM

All 1115059 Aftercooler Cores with date codes prior to 02339 must be inspected to determine whether or not they should be removed from dealer part stock. If the aftercooler cores are used there is the potential of having an aftercooler core failure during engine operation and possibly causing engine damage.

ACTION REQUIRED

Inspect loose aftercooler cores within dealer inventory per the rework procedure. Remove aftercooler cores from inventory if and only if the aftercooler core meets the guidelines called out within the rework procedure. See Rework Procedure.

SERVICE CLAIM ALLOWANCES

Submit one claim for all 1115059 removed from parts stock.

PARTS DISPOSITION

NOTE: All dealers are to make sure the outside of the shipping container is marked PI70055. ***** U.S. and Canadian Dealers *****

Return all 1115059 that are removed from parts stock 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 Warranty Bulletin on warranty parts handling.

Attach. (1-Rework Procedure)

Rework Procedure

It is necessary to first locate the five digit Julian date code which is located below the Cat part number as seen in Illustration 1. This information will be located near one of the ends of the aftercooler core as shown in Illustration 2.
If and only if the Julian date code is prior to 02339 will you continue the inspection process.
If the inspection must proceed then it will be necessary to view the bottom water passage from the aftercooler core end tank water inlet/outlet area. See Illustration 2.
Since only the bottom water passage is visible through the end tank water inlet/outlet please refer to the bottom water passage for the sort criteria.
The aftercooler cores bottom water passage may have a diagonal fin present when looking into the end tank.
If you can see a large water fin passage with a diagonal fin in any of the bottom passages as seen in Illustration 3 then the aftercooler core has a small "L" shaped water fin passage on the top portion of the core and may fail.
If the aftercooler core looks like Illustration 3 or 4 then it is required that the dealer remove it from their inventory and return it for a replacement aftercooler core.
If the dealer can see a small water fin passage or an "L" shaped water fin on the bottom portion of the aftercooler core as seen in Illustration 5 then the core has the preferred water fin orientaiton.
The cores similar to what is seen in Illustration 5 do not have to be removed from dealer inventory and can be used.
If the aftercooler core has a Julian date code past 02339 then it is not necessary to inspect or replace the aftercooler core.