PRODUCT SUPPORT PROGRAM FOR REPLACING THE JACKET WATER PUMP ON CERTAIN 797, 797B, AND 797F OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE JACKET WATER PUMP ON CERTAIN 797, 797B, AND 797F OFF-HIGHWAY TRUCKS

Usage:

TEBE6876-01

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19Oct2017

(Revised 10Dec2018)

U-552

A-394

D-461

O-461

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After Failure Only	PRODUCT SUPPORT PROGRAM FOR REPLACING THE JACKET WATER PUMP ON CERTAIN 797, 797B, AND 797F OFF-HIGHWAY TRUCKS
1361		PS53593

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NOTE:	Caterpillar’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 Caterpillar.
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 "PS53593" 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 Caterpillar product analyst.

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NOTE:	This Revised Service Letter replaces the 19Oct2017 Service Letter. Changes have been made to the Termination Date, Affected Product, Parts Needed, and Action Required.

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TERMINATION DATE

30Apr2020

PROBLEM

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The existing jacket water pump shaft seal may fail on certain 797, 797B, and 797F Off-Highway Trucks. If the existing jacket water pump shaft seal fails it will result in a coolant leak from the weep hole on the pump.

AFFECTED PRODUCT

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Model	Identification Number
797	5YW00260
797B	JSM00146-00147, 151-152, 220-225, 236-237, 244, 252, 256, 293, 390
797F	LAJ00141-00658 LTZ00140-00141
797F XQ	WSP00100-00129

PARTS NEEDED

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Qty	Part Number	Description
1	9M3786	SEAL-O-RING
1	20R8733	PUMP GP-WATER -B
1	1757904	SEAL-O-RING
1	2139397	SEAL-O-RING
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 4% 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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An intermittent drip coming from the weep hole is an acceptable amount of leakage. Intermittent dripping can start and stop throughout the life of the pump, and is a normal part of the operation of the pump.

Wetness or discoloration as a result of dried coolant around the weep hole, without the presence of a continuous drip or a constant stream, is typically another indication of intermittent dripping that is part of the normal operation of the pump.

If a continuous drip is found coming from the water pump weep hole when the engine is off, or a constant stream when the engine is running, replace the pump.

If you are also experiencing low coolant levels, or having to top off coolant frequently, and there is no other source for system coolant loss, replace the pump.

Refer to the attached Rework Procedure.

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SERVICE CLAIM ALLOWANCES

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Product smu/age whichever comes first	Caterpillar		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
0-8000 hrs, 0-18 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 6.0-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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PARTS DISPOSITION

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Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

Rework Procedure

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Refer to Disassembly and Assembly, KENR6052, for water pump removal and installation procedures.

NOTE: After pump replacement, and prior to starting the engine, the cooling system must be properly vented to ensure trapped air is removed. Updates have been made to the Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" story. Proper air venting is crucial to ensure adequate water pump life.

Air Venting Procedure:

1.) Starting with a drained system, add coolant at a fill rate up to 32 L/min. Bottom or top fill methods are allowed, but bottom fill procedure is the preferred method.

2.) Start the engine with the radiator cap removed.

3.) Connect Cat ET and override the thermostat position to 50% open.

4.) Run the engine at low idle for 1 minute.

5.) Increase the engine speed to 1200 RPM for 2 minutes.

6.) Disable the thermostat override using Cat ET.

7.) Shutdown the engine.

8.) Top off coolant to the proper fill level.

9.) Install radiator fill cap.