PRODUCT IMPROVEMENT PROGRAM FOR REMOVING CERTAIN 183-9511 SPIDER GEARS AND 273-0178 SIDE GEARS FROM DEALER PARTS STOCK Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR REMOVING CERTAIN 183-9511 SPIDER GEARS AND 273-0178 SIDE GEARS FROM DEALER PARTS STOCK [UEBE0292]

SERVICE EQUIPMENT AND SUPPLIES

PARTS STOCK, ORDERING & RETURN

PRODUCT IMPROVEMENT PROGRAM FOR REMOVING CERTAIN 183-9511 SPIDER GEARS AND 273-0178 SIDE GEARS FROM DEALER PARTS STOCK

UEBE0292-03

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12Feb2020

(Revised 28Feb2020)

U-64

A-49

D-60

O-59

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Parts stock action only	PRODUCT IMPROVEMENT PROGRAM FOR REMOVING CERTAIN 183-9511 SPIDER GEARS AND 273-0178 SIDE GEARS FROM DEALER PARTS STOCK
7552 7750		PI70795

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NOTE:	AVSpare’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to AVSpare.
NOTE:	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.

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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 AVSpare product analyst.

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NOTE:	This Revised Service Letter replaces the 12Feb2020 (Revised 26Feb2020) Service Letter. Changes have been made to the Action Required.

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TERMINATION DATE

31May2020

PROBLEM

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Certain 183-9511 Spider Gears and 273-0178 Side Gears, for use in 797, 797B, and 797F Off-Highway Truck Differentials, may be incorrectly machined and lead to a premature failure. The gears (if assembled) will lead to an incorrect backlash and rotating torque specification, which can cause a low hour differential failure.

ACTION REQUIRED

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Inspect dealer stock of the 183-9511 Spider Gears and 273-0178 Side Gears to confirm the supplier code markings scribed on the side of the gear. Any 183-9511 Spider Gear marked as 183-9511 U AON AVS is suspect and needs to be removed from dealer stock. Any other gear marking codes are not suspect and do not need to be removed from dealer stock. Please reference image 1 for the suspect gear markings for the 183-9511 Spider Gear.
An additional visual indicator of a suspect 183-9511 Spider Gear, is a unique chamfer on the convex side of each gear teeth. This added chamfer will vary in width from gear to gear. Please reference image 2 for the chamfer identification.
Please reference image 3 and 4 for the gear markings for the suspect 273-0178 Side Gear. The U AOU code and serial number (marked opposite side of the part number) can be used to identify suspect 273-0178 Gears.

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Image1

Image2

Image3

Image4

SERVICE CLAIM ALLOWANCES

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Submit one claim for all parts removed from dealer parts stock.

PARTS DISPOSITION

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NACD:

Hold all 183-9511 and 273-0178 Gears for a Parts Return Request (PRR). A Parts Return Request (PRR) will be issued to you through the Send-It-Back process after the claim is submitted. Make sure to list the service letter program number on the packing slip and include the closed work order paperwork. Handle all other parts in accordance with your Warranty Bulletin on warranty parts handling.

EAME, LACD, and APD:

Hold all 183-9511 and 273-0178 Gears for 30 days for a possible Parts Return Request (PRR). Make sure to list the service letter program number on the packing slip and include the closed work order paperwork. Handle all other parts in accordance with your Warranty Bulletin on warranty parts handling.

If a Parts Return Request (PRR) is not issued to you after 30 days through the Send-It-Back process, handle the parts in accordance with your warranty bulletin on warranty parts handling.