PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REPLACING THE SETSCREWS THAT HOLD THE RADIATOR FAN ONTO THE DRIVE ASSEMBLY SHAFT ON CERTAIN 3508B, 3512B, AND 3516B GENSETS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REPLACING THE SETSCREWS THAT HOLD THE RADIATOR FAN ONTO THE DRIVE ASSEMBLY SHAFT ON CERTAIN 3508B, 3512B, AND 3516B GENSETS

Usage:

REBE4474-01

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11Nov2008

(Revised 04Dec2008)

U-568

A-472

D-484

O-523

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REPLACING THE SETSCREWS THAT HOLD THE RADIATOR FAN ONTO THE DRIVE ASSEMBLY SHAFT ON CERTAIN 3508B, 3512B, AND 3516B GENSETS
1356 7553		PI31575

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI31575" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. Exception: If the repair is done after failure, use "PI31575" as the Part Number, "7751" as the Group Number, "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 Caterpillar product analyst.

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NOTE:	This Revised Service Letter replaces the 11Nov2008 Service Letter. Changes have been made to Affected Product.

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COMPLETION DATE	TERMINATION DATE
31May2009	30Nov2009

PROBLEM

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The existing setscrews can be too short on certain 3508B, 3512B, and 3516B gensets. If the existing setscrews fail it can cause the fan to fall off its shaft while the genset is being moved, damaging the radiator and other components of the cooling system. If fan slides towards the engine during operation of the genset, the fan blade mounting bolts may come in contact with the beam that supports the fan shaft.

AFFECTED PRODUCT

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Model	Identification Number
3508B	ZAD00122
3512B	ZAH00124, 126, 128, 140, 142-143, 146-147, 159, 164-166, 231, 252, 289-292, 298, 310-313, 317, 328, 342-344, 348, 355-357, 359, 365-366, 368-369, 372-374, 376, 378, 382-383, 385-387, 389, 391-394, 401, 426, 428-429, 433-434, 436, 438, 444, 447-449, 453-454, 474-475, 479-481, 484, 493-496, 500 ZAJ00140-00143
3516B	ZAP00114-00116, 118-120, 124-132, 137-140, 144, 146-147, 151-152, 157-167, 175, 177-178, 182, 192-194, 201-202, 207, 218-221, 223-224, 226-232, 235, 241-242, 244, 247-250, 252-253, 265-274, 276, 295-300, 302-303, 312, 315-316, 330, 332-335, 337-340, 342-344, 347, 349, 354, 356, 360, 365, 368, 372, 377, 380-381, 384, 386, 390-391, 395-396, 398-399, 401-402, 404-408, 411, 414-416, 418-421, 423, 427-431, 434, 437-438, 440, 442-447, 450-453, 455-460, 464-468, 470, 472, 474, 476-480, 482-486, 488-489, 492, 496, 498, 502-505, 510, 512, 514, 516-517, 519-520, 525-528, 533-541, 543-544, 546, 548-549, 551, 555-556, 558, 560, 565-567, 569-570, 572, 579-580, 583-589, 591-593, 597 ZAR00114, 148, 150, 154-155, 162, 174-179, 181, 221-222, 230

PARTS NEEDED

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Qty	Part Number	Description
2	4B1771	SETSCREW-SOCKET
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 40% 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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Fan setscrews need to be inspected and possibly replaced. Refer to the attached Rework Procedure.

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OWNER NOTIFICATION

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U.S. and Canadian owners will receive the attached Owner Notification.

SERVICE CLAIM ALLOWANCES

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Caterpillar		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
100%	100%	0%	0%	0%	0%

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NOTE: This is a 1.0-hour job
An additional 1.0 hour will be allowed if rework is required.

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PARTS DISPOSITION

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

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

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COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REPLACING THE SETSCREWS THAT HOLD THE RADIATOR FAN ONTO THE DRIVE ASSEMBLY SHAFT ON CERTAIN 3508B, 3512B, AND 3516B GENSETS

MODELS INVOLVED - 3508B, 3512B, and 3516B Gensets

Dear Caterpillar Product Owner:

The fan setscrews need to be inspected and possibly replaced on certain 3512B and 3516 gensets. The existing setscrews can be too short. If the existing setscrews fail it can cause the fan to fall of its shaft while the genset is being moved, damaging the radiator and other components of the cooling system. If fan slides towards the engine, during operation of the genset, the fan blade mounting bolts may come in contact with the beam that supports the fan shaft. You will not be charged for the service performed.

Contact your local Caterpillar dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service.

Please refer the dealer to their Service Letter dated 11Nov2008 when scheduling this service.

We regret the inconvenience this may cause you, but urge you to have this service performed as soon as possible to prevent unscheduled downtime.

Caterpillar Inc.

Identification #(s)

Attached to 11Nov2008 Service Letter

Rework Procedure

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Inspect the radiator core. If there is a yellow dot on the upper right of the core tag, the unit has been reworked at the factory and does not need to be reworked. If there is no yellow dot, proceed with rework procedure below. Refer to Image 1.1.1 for yellow dot reference.

Image1.1.1

1. Disable unit from starting, by enabling the E-Stop and removing the battery cables from the battery.

2. Remove upper right fan guard.

3. Reach through the fan and remove 2 set screws ( 1/4 " hex head). Do not reuse the two set screws.

4. Apply loctite 7649 to clean threads of 2 new 4B-1771 Set Screws.

5. Apply 2-3 drops of red loctite 262 to each set screw and install back into fan. Make sure that the fan is flush with the end of the drive shaft before tightening the set screws.

6. Tighten the set screws to a torque of 52 +/- 3 lb ft (71 +/- 4 Nm).

7. Securely replace fan guard.

8. Reinstall battery cables and enable E-Stop, allowing unit to return to service.