PRODUCT SUPPORT PROGRAM FOR REPLACING SPRINGS WITHIN THE 137-3391 VALVE GROUP ON CERTAIN 330B UHD, 345B L UHD, 345B L II UHD, 345C AND UHD EXCAVATORS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING SPRINGS WITHIN THE 137-3391 VALVE GROUP ON CERTAIN 330B UHD, 345B L UHD, 345B L II UHD, 345C AND UHD EXCAVATORS

Usage:

REBE4393-00

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21Nov2008

U-595

O-546

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*Before/After*	PRODUCT SUPPORT PROGRAM FOR REPLACING SPRINGS WITHIN THE 137-3391 VALVE GROUP ON CERTAIN 330B UHD, 345B L UHD, 345B L II UHD, 345C AND UHD EXCAVATORS
5051		PS42840

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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 "PS42840" 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:

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

30Nov2010

PROBLEM

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The existing fore boom valve opening curve is not fitting with the pedal modulation range on certain 330B UHD, 345B L UHD, 345B L II UHD, and 345C UHD Excavators. This valve does not allow a fine positioning of the tool.

AFFECTED PRODUCT

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Model	Identification Number
330B	4RS00330-00333, 335-336, 339, 347, 351, 355-356, 358, 360-362, 367-368, 380, 383, 385, 387, 402, 412, 415-416, 419, 422-423, 425-426, 428-429, 435, 440, 442, 444-447, 450, 452, 455, 457, 459, 461, 464-466, 470-472, 474, 479, 482, 485, 491-495, 499, 501, 503, 607, 612-613, 615, 617, 619, 623-624, 626, 631, 633, 637-642 5LS00203, 237-238, 245-246
345B L	2SW00098, 101, 103-107, 110, 113, 119, 127, 131, 135, 137, 145, 150-151, 154-156, 158, 201, 206, 210, 212
345B L II	CCC00357, 363, 374, 423, 437, 444, 465, 528, 657, 686, 785, 802, 812, 823, 837, 886, 896, 984, 1000, 1092, 1131, 1196, 1214, 1240, 1248, 1296, 1343, 1364, 1369
345C	SPC00223-00227, 229-232, 235-236, 238, 241-242, 244-245, 248, 250-252, 254-257, 259, 263, 265-269, 271, 274-277, 279-280, 283

PARTS NEEDED

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Qty	Part Number	Description
2	3297253	SPRING
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 9% 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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Replace 2 former springs with new 329-7253 Springs within the 137391 Fore Boom Valve. 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, 0-48 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 2.0-hour job

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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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Place the machine in the shipping position: boom cylinder, fore boom cylinder, and stick cylinder retracted.
Release the hydraulic pressure.

Image1.1.1

Image1.1.2

Remove the pilot lines as well as the T connector in order to have easier access to the bolts for the front cover. Plug the lines to limit leak of hydraulic oil (less than 0.5l).

Image1.2.1

Image1.2.2

Remove the front cover.

Image1.3.1

Replace the former spring with a 329-7253 Spring. Make sure that the seals are not damaged, if so replace them with new seals. After that, place the front cover on the valve and take care of the 3 springs position.

Image1.4.1

Image1.4.2

Repeat the operation on the rear side of the valve. Remove the cover and replace the spring with a 329-7253 Spring. After that, place the rear cover on the valve and take care of the 3 springs position.

Image1.5.1

Tighten the cover bolts to a torque of 94 +/- 7 Nm (rear and front side of the valve). Reinstall the pilot lines and purge the pilot hydraulic circuit.