PRODUCT SUPPORT PROGRAM FOR REPLACING THE 274-7942 AND 274-7943 GUARD ASSEMBLIES ON CERTAIN 773F AND 775F OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE 274-7942 AND 274-7943 GUARD ASSEMBLIES ON CERTAIN 773F AND 775F OFF-HIGHWAY TRUCKS

Usage:

REBE4478-00

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02Feb2009

U-43

A-39

D-34

O-35

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After Failure Only Parts stock action needed	PRODUCT SUPPORT PROGRAM FOR REPLACING THE 274-7942 AND 274-7943 GUARD ASSEMBLIES ON CERTAIN 773F AND 775F OFF-HIGHWAY TRUCKS
7755 1360		PS51621

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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 "PS51621" 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:

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

28Feb2011

PROBLEM

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The existing 274-7942 and 274-7943 Guard Assemblies may fail on certain 773F and 775F Off-Highway Trucks. These guard assemblies fail from sustained periods of vibration that result in guard wires breaking (see Image 1). The 274-7942 and 274-7943 Guard Assemblies are part of the 265-8058 and 250-7573 Fan Drive Group.

AFFECTED PRODUCT

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Model	Identification Number
773F	EED00273-00321, 324-999
773F OEM	EXD00100-00102
775F	DLS00275-00280, 282-295, 298-326, 328-337, 339-345, 347, 349-1021

PARTS NEEDED

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Qty	Part Number	Description
4	5C7261	NUT-HEX
4	5P4116	WASHER-HARD
4	7X0613	WASHER-HARD
4	7X0818	BOLT
1	3202411	GUARD AS-BELT
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 3% 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 ****

Remove all 274-7942 and 274-7943 Guard Assemblies from dealer parts stock.

****Affected Product****

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Refer to the Service Manual and the attached Rework Procedure to replace the failed guard assemblies with the new 320-2411 Guard Assembly.

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Image1

SERVICE CLAIM ALLOWANCES

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****Parts Stock****

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

****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%
0-15000 hrs, 0-52 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 3.0-hour job

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PARTS DISPOSITION

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****Parts Stock****

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

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****Affected Product****

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

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Rework Procedure

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Refer to the Service Manual if/as necessary.

1. Engage Engine Lockout Control. See Operation Section, Machine Operation in Operation and Maintenance Manual.

2. Remove the bolts (1), washers (2), and nuts (3) that fasten the 274-7943 Guard As. (4) and 274-7942 Guard As. (5) together. See Image 1.1.1.

Image1.1.1

3. Remove the bolts (1), washers (2), and nuts (3) that fastens the 274-7943 (4) Guard As. to the 275-1152 Bracket (6) and 275-1153 Bracket (7) and remove guard as. See Image 1.2.1 and 1.2.2.

Image1.2.1

Image1.2.2

4. Remove the bolts (1), washers (2), and nuts (3) that fastens the 274-7942 Guard As. (5) to the 276-7517 Bracket As. (8) and remove guard as. See Image 1.3.1.

Image1.3.1

5. Remove the seven 8T-4908 Bolts (9) and 7X-579 Washers (10) that fasten the 320-2411 Guard As. (11) and (12) together. See Image 1.4.1.

Image1.4.1

6. Place the two halves of the 320-2411 Guard As. (11) and (12) in position around fan belts, and assemble loosely to 276-7517 Bracket As. (8) using two 7X-0818 Bolts (13), 7X-0613 Washers (14), 5C-7261 Nuts (15), and 5P-4116 Washers (16). See Image 1.5.1.

Image1.5.1

7. Assemble top half of 320-2411 Guard As. (11) to bottom half of 320-2411 Guard As. (12) using the removed hardware from Step 5. Tighten to 7 Nm +/-1 Nm (5.2 lb-ft +/- .7 lb-ft).

8. Assemble loosely top half of 320-2411 Guard As. (11) to the 275-1152 Bracket (6) and 275-1153 Bracket (7) using two 7X-0818 Bolts (13), 7X-0613 Washers (14), 5C-7261 Nuts (15), and 5P-4116 Washers (16). See Image 1.6.1, 1.2.1 and 1.2.2.

Image1.6.1

9. Tighten four 7X-0818 Bolts to 28 Nm +/- 7 Nm (20.7 lb-ft +/- 5.2 lb-ft).

10. Remove all tools from machine area and disengage Engine Lockout Control. See Operation Section, Machine Operation in Operation and Maintenance Manual.