PRODUCT SUPPORT PROGRAM FOR REPLACING R450 VOLTAGE REGULATOR ON CERTAIN C6.6 GENERATOR SETS AND XQ175 RENTAL GENERATOR SETS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING R450 VOLTAGE REGULATOR ON CERTAIN C6.6 GENERATOR SETS AND XQ175 RENTAL GENERATOR SETS

Usage:

REBE7299-00

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07Nov2011

U-489

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*After Failure Only*	PRODUCT SUPPORT PROGRAM FOR REPLACING R450 VOLTAGE REGULATOR ON CERTAIN C6.6 GENERATOR SETS AND XQ175 RENTAL GENERATOR SETS
4450		PS52124

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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 "PS52124" 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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TERMINATION DATE

30Nov2013

PROBLEM

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The existing R450 automatic voltage regulators (AVR) can fail on certain C6.6 Generator Sets and XQ175 Rental Generator Sets that are equipped with permanent magnet generator excitation generators in 60Hz applications. If the existing AVR fails it will result in instability in the output voltage of the generator.

AFFECTED PRODUCT

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Model	Identification Number
*****Group 1*****
C6.6	N6D02063, 2089, 2091, 2099, 2119, 2121, 2138, 2147, 2206, 2240, 2246

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*****Group 2*****
C6.6	MRW00294-00295, 297-298, 300-301, 303, 314-327

PARTS NEEDED

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Qty	Part Number	Description
*****Group 1*****
1	3526019	REGULATOR-R450
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.
*****Group 2*****
1	3526019	REGULATOR-R450
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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The problem can be resolved by replacing the R450 AVR.

1. Switch off the generator set and disconnect any auxiliary supplies.

2. Disconnect the sensing wires and volts adjust wires from the AVR.

3. Unbolt and retain the 4 off M5 bolts securing the AVR to the control panel.

4. Using the 4 off M5 bolts fit one R450 to the control panel, reconnect the sensing wires and the volts adjust wiring.

5. Using the old AVR as a reference ensure that all the original settings for rotary switches are copied over to the new AVR.

6. Reconnect any auxiliary supplies, run the generator set and check for correct operation of the AVR.

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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%
*****Group 1*****
0-1000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

NOTE: This is a 0.5-hour job for Group 1

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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%
*****Group 2*****
0-1000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%