HOSE 1281771 - Caterpillar

Parts stock action only
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING 170-0497 BEARING CUPS IN DEALER PARTS STOCK
7750 PI70312
When submitting claim for Parts Stock Action, Use the appropriate 99Z as the s/n, the appropriate Service Letter Program Number as the Part number in the Part Causing Failure field, "7751" as the Group Number, "56" as the Description Code.
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.
This Revised Service Letter replaces the 26Jun2009 Service Letter. Changes have been made to the Rework Procedure.
TERMINATION DATE
30Sep2009
PROBLEM
The potential exists for cracks to be present in 170-0497 Bearing Cups. The cracks initiate from a bolt hole located on the small face of the cup. The cracks start in the root of the top thread of the bolt hole, at the point of the thread that is closest to the outside diameter of the part, and propagate outward through the chamfer to the outside edge of the part.
ACTION REQUIRED
Sort and inspect 170-0497 Bearing Cups in dealer parts stock for cracks at the four threaded holes around the bearing cup perimeter. Image1
Refer to the attached Rework Procedure.
Image1
SERVICE CLAIM ALLOWANCES
A maximum of 2.0 hours will be allowed for each bearing cup in dealer parts stock that is inspected for cracks according to Rework Procedure Step 2 - Step 8.
Submit one claim for all parts that are inspected, or inspected and removed from dealer parts stock.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
1. Inspect the packaging date code on the outside of the wooden crate. The first nine characters of the date code indicate Day, Month, Year. Determine if the packaging date is between D30M12Y08 and D01M06Y09 (30 Dec 2008 thru 01 June 2009).
Image1.1.1
- If the packaging date IS between D30M12Y08 and D01M06Y09 (30 Dec 2008 thru 01 June 2009), proceed to step 2.
- If the packaging date IS NOT between D30M12Y08 and D01M06Y09 (30 Dec 2008 thru 01 June 2009), mark the crate to indicate the part has been inspected according to PI7#### / REBE5273 and return the part to dealer parts stock. No further action is necessary for these parts.
2. Remove the bearing cup from the crate to prepare it for inspection for cracks similar to the crack shown in Image1.2.1.
Image1.2.1
3. Clean the bearing cup surface to remove the rust preventative from the area between each of the four threaded holes and the outside edge of the bearing cup.
4. Use a penetrating dye crack detection process to check for a crack in each of these four locations. Reference Cat P/N 4C-4804 aerosol liquid penetrant and Cat P/N 4C-4805 aerosol liquid developer in the 2008-2009 One Safe Source Catalog. Follow the dye penetrant instructions carefully to avoid missing a crack.
- If a crack IS found in any of these locations, remove the part from dealer parts stock. Mark the part as defective according to