PRODUCT SUPPORT PROGRAM FOR INSPECTING THE FRONT WHEEL BRAKE COOLING PORTS AND BRAKE COOLING TUBE ASSEMBLIES ON CERTAIN 794 AC OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR INSPECTING THE FRONT WHEEL BRAKE COOLING PORTS AND BRAKE COOLING TUBE ASSEMBLIES ON CERTAIN 794 AC OFF-HIGHWAY TRUCKS

Usage:

TEBE9117-00

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03May2019

U-267

A-224

D-236

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Before/After Parts stock action needed	PRODUCT SUPPORT PROGRAM FOR INSPECTING THE FRONT WHEEL BRAKE COOLING PORTS AND BRAKE COOLING TUBE ASSEMBLIES ON CERTAIN 794 AC OFF-HIGHWAY TRUCKS
7755 4006 4251 4257 5057		PS46252

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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 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 "PS46252" 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:

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, "7755" as the Group Number, "56" as the Description Code.

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NOTE:

Although this Program is to be administered as described above on the Affected Product, parts should be removed from parts stock as soon as possible.

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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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TERMINATION DATE

31May2021

PROBLEM

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The cooling ports for the 442-2571 Front Wheel Brake, the left hand 442-3378 Brake Cooling Tube Assembly, and the right hand 442-3376 Brake Cooling Tube Assembly may contain debris or corrosion on certain 794 AC Off-Highway Trucks.

AFFECTED PRODUCT

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Model	Identification Number
794 AC	HRT00102 MT500102-00107, 121-125, 128-143

PARTS NEEDED

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Qty	Part Number	Description
6	2343544	SEAL-O-RING
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 32% 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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****Parts Stock ****

Inspect all 442-2571 Wheel Groups, 442-3378 Tube Assemblies, and 442-3376 Tube Assemblies in dealer parts stock for cleanliness. Remove any debris or corrosion such as shown in Image 1 and Image 2.

****Affected Product****

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1. Remove left hand (A) and right hand (B) brake cooling hose assembly connection to front wheel. Save bolts, washers and split flanges. Inspect front wheel port cleanliness and remove any debris or corrosion.

2. Remove left hand (C) and right hand (D) brake cooling tube assembly. Save bolts, washers, split flanges and clips. Inspect front wheel port cleanliness and remove any debris or corrosion. See Image 1. Inspect tube assemblies for cleanliness and remove any debris or corrosion. See Image 2.

3. Assemble left hand (A) and right hand (B) brake cooling hose assembly connection to front wheel using one 234-3544 Seal O-Ring and bolts, washers and split flanges removed in Step 1. Tighten bolts to 100 +/- 20 Nm (74 +/- 15 lb ft).

4. Assemble left hand (C) and right hand (D) brake cooling tube assembly to front wheel and hose assembly using two 234-3544 Seal O-Ring and bolts, washers, split flanges and clips removed in Step 2. Tighten bolts at wheel to 105 +/- 20 Nm (77 +/- 15 lb ft). Tighten all other bolts to 100 +/- 20 Nm (74 +/- 15 lb ft).

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Image1

Image2

Image3

SERVICE CLAIM ALLOWANCES

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****Parts Stock****

Submit one claim for all parts in dealer parts stock that were inspected for cleanliness and any debris or corrosion removed. One hour of labor will be allowed per part inspected and debris or corrosion removed.

****Affected Product****

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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%
0-6000 hrs, 0-12 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 4.0-hour job
When applicable, a maximum of $100 per affected branch will be allowed for materials to inspect and remove debris or corrosion.

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