PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REWORKING FRONT WHEEL BEARING RETAINER BOLTS ON CERTAIN 794 AC, 796 AC, AND 798 AC OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REWORKING FRONT WHEEL BEARING RETAINER BOLTS ON CERTAIN 794 AC, 796 AC, AND 798 AC OFF-HIGHWAY TRUCKS [UEBE0004]

BRAKING SYSTEM

BRAKE GP

PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REWORKING FRONT WHEEL BEARING RETAINER BOLTS ON CERTAIN 794 AC, 796 AC, AND 798 AC OFF-HIGHWAY TRUCKS

UEBE0004-01

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18May2020

(Revised 28May2020)

U-316

A-262

D-298

O-292

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Before/After	PRODUCT SUPPORT PROGRAM FOR INSPECTING AND REWORKING FRONT WHEEL BEARING RETAINER BOLTS ON CERTAIN 794 AC, 796 AC, AND 798 AC OFF-HIGHWAY TRUCKS
4201 4251 4006		PS46719

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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:

This Program must be administered either before or after failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS46719" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. If administered after failure, use "96" as the Warranty Claim Description Code, and "Z" as the SIMS 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 18May2020 Service Letter. Changes have been made to the Affected Product and Action Required.

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TERMINATION DATE

31May2022

PROBLEM

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The Front Wheels on certain 794 AC, 796 AC, and 798 AC Off-Highway Trucks may have been assembled with grade 5, 432-9994 Bearing Retainer Bolts. The bearing retainer bolts should be assembled only with grade 8 hardware (432-9994 Bolts, quantity 10 per wheel assembly). The grade 5 bolts used could lead to a potential bolted joint issue and poor component life.

AFFECTED PRODUCT

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Model	Identification Number
794 AC	HRT00100-00106 MN500052-00056 MT500100-00173
796 AC	HRZ00500-00507
798 AC	SKH00600-00606 ST300198-00199 ST700400-00402

PARTS NEEDED

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Qty	Part Number	Description
1	7X1548	SEAL-O RING
275	4329990	WIRE-BULK
10	4329994	BOLT-HEX HEAD
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 28% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.

ACTION REQUIRED

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Reference the proper Disassembly and Assembly Manuals as needed.
1. Remove front wheel drain plug to drain oil. Replace plug when oil is drained.
2. Remove 3613250 Cover by removing 8T4194 Bolt and 8T4223 Washer. Save cover, bolts and washers
3. Remove 7X1548 O-ring
4. Inspect wheel retaining bolts 4329994 and identify any bolts that are not Grade 8 (6 slashes) to be removed
5. Remove one bolt and replace with 4329994 bolt. Tighten to 800+/- 5Nm. Please reference UENR2271 Front Wheel, Bearing and Duo Cone Seal - Install if a full disassembly and assembly is required.
6. Repeat step 5 until all wheel retaining bolts are Grade 8 (6 slashes)
7. Replace safety wire for each bolt that was replaced using 4329990 Wire-Bulk
8. Replace 7X1548 O-ring with new part
9. Install 3613250 Cover with 8T4194 Bolt and 8T4223 Washer
10. Refill front wheel with oil

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SERVICE CLAIM ALLOWANCES

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Product smu/age whichever comes first	AVSpare		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
0-60000 hrs, 0-96 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 5.0-hour job If there has been a previous repair, part age/hours will apply. Retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim.

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