PRODUCT SUPPORT PROGRAM FOR REPLACING GENERATOR ON CERTAIN 794 AC, 796 AC, AND 798 AC OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING GENERATOR ON CERTAIN 794 AC, 796 AC, AND 798 AC OFF-HIGHWAY TRUCKS [UEBE0391]

ELECTRICAL AND STARTING SYSTEM

PRODUCT SUPPORT PROGRAM FOR REPLACING GENERATOR ON CERTAIN 794 AC, 796 AC, AND 798 AC OFF-HIGHWAY TRUCKS

UEBE0391-01

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30Mar2020

(Revised 10Aug2020)

U-174

A-133

D-161

O-158

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After Failure Only	PRODUCT SUPPORT PROGRAM FOR REPLACING GENERATOR ON CERTAIN 794 AC, 796 AC, AND 798 AC OFF-HIGHWAY TRUCKS
4456 4450 4019 1404		PS54302

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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 can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS54302" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "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 30Mar2020 Service Letter. Changes have been made to the Problem, Parts Needed, Action Required, and Service Claim Allowances.

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TERMINATION DATE

31Mar2022

PROBLEM

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The existing generator group on certain 794 AC, 796 AC, and 798 AC Off-Highway Trucks can have coupling bolts improperly tightened which can cause wear on the generator rotor shaft. If the generator rotor shaft has wear it will stop the machine, lose propel, and the generator will have to be replaced.

AFFECTED PRODUCT

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Model	Identification Number
794 AC	HRT00101-00104 MT500113-00150
796 AC	HRZ00500, 503-507
798 AC	ST700401-00402

PARTS NEEDED

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Qty	Part Number	Description
12	8T4193	BOLT-HEX HEAD
1	8T6381	BOLT-HEX HEAD
1	20R6359	GENERATOR GP-PWR
16	2194481	BOLT-HEX HEAD
1	3902042	HUB-DRIVE
1	5602925	COUPLING GP-TORS
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 1% 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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If the generator shaft is found to be damaged via a coupling bolt torque inspection then this letter is to be applied to cover the generator replacement. Replace the failed 390-2000 Generator with a Reman 20R-6359 Generator.

Refer to service literature if/as necessary.

Refer to Disassembly and Assembly UENR2270, Power Generator - Remove and
Install.

Refer to Service Magazine M0095652 "An Improved Sealed Coupling Group is Now Used on Certain 794 AC Off-Highway Trucks."

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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%
0-10000 hrs, 0-30 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
10001-15000 hrs, 31-45 mo	93.0%	100.0%	0.0%	0.0%	5.0%	0.0%
15001-20000 hrs, 46-60 mo	87.0%	100.0%	0.0%	0.0%	10.0%	0.0%

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NOTE: This is a 24.0-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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