PRODUCT SUPPORT PROGRAM FOR REWORKING THE STICK CYLINDER ON CERTAIN 345C EXCAVATORS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REWORKING THE STICK CYLINDER ON CERTAIN 345C EXCAVATORS

Usage:

REBE4971-02

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06Jan2010

(Revised 04Oct2010)

U-5

A-5

D-4

O-6

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*After Failure Only*	PRODUCT SUPPORT PROGRAM FOR REWORKING THE STICK CYLINDER ON CERTAIN 345C EXCAVATORS
5458		PS51788

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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 "PS51788" 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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NOTE:	This Revised Service Letter replaces the 06Jan2010 (Revised 08Jan2010) Service Letter. Changes have been made to the Affected Product and Parts Needed.

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TERMINATION DATE

31Jan2012

PROBLEM

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Excessive deflection or deformation of the stick cylinder flange due to high snubbing pressures in the cylinder may cause failure of the backup ring and the seal, and result in leakage of hydraulic fluid from the head to cylinder assembly joint on certain 345C Excavators.

AFFECTED PRODUCT

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Model	Identification Number
345C	DHP00248-00353, 355-449, 452, 459-460 ESD00168-00174, 176-225, 227-232, 234-245 PJW00355, 358-425, 427-431, 433-444, 446, 448-461, 463-507, 510, 512-538, 540-549, 551-565, 567-572, 574-592, 594-601, 603-635, 639-669, 671-694, 696-704, 706-755, 758-985, 987-998, 1000-1189, 1191-1197, 1199-1264, 1266-1296, 1299-1333, 1335-1406, 1408-1474, 1477-1482, 1484, 1487, 1490-1580, 1582-1618, 1620-1683, 1686-1694, 1696-1721, 1723-1729, 1731-1770, 1772-1826, 1828-1830, 1832-1836, 1838-1839, 1841-1857, 1859-1950, 1952-1959, 1961-2095, 2097-2189, 2191-2207, 2209-2259, 2262-2303, 2305-2310, 2312-2316, 2319-2426, 2428-2442 TDG00250-00257, 259-275, 277-282, 286-325, 327, 331-336, 338-378, 380-383, 385-412 WDE00149, 157
345C L	S5M00291 TAJ00210, 287, 291, 294, 319, 363

PARTS NEEDED

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Qty	Part Number	Description
2	1P3704	SEAL-RECTANGULAR
1	1P3705	SEAL-RECTANGULAR
2	9X4597	SEAL-PIN
1	0951730	SEAL-O-RING
1	1261978	RING-BACK UP
1	3525651	CYLINDER AS
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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Rework the stick cylinder assembly per 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%
0-4000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
4001-6000 hrs, 25-36 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%

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NOTE: This is a 7.0-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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Refer to the Disassembly and Assembly Manual that is appropriate for your machine.

1. Remove the stick cylinder group from the machine.

2. Disassemble the stick cylinder group by removing the head assembly and the rod assembly from the cylinder assembly.

Image1.1.1

Image 1.1.1 - Head End Of Stick Cylinder Group

(1) 095-1730 O-Ring Seal
(2) 126-1978 Backup Ring
(A) Cylinder Barrel

Image1.2.1

Image 1.2.1 - Flange End Of old Cylinder Assembly

(A) Cylinder barrel
(B) 190.0 +/- 0.1 mm (7.4803 +/- 0.004 inch)

3. If there have been repeated seal failures or the seal failure occurred at low hours, replacement of the cylinder assembly is recommended.

4. Measure the inside diameter of the cylinder barrel at the joint for the head seal. The specification for the inside diameter is 190.0 +/- 0.1 mm (7.4803 +/- 0.004 inch). If the inside diameter of the cylinder barrel is oversize, the old cylinder assembly must be replaced by a 352-5651 Cylinder Assembly.

Image1.3.1

Image 1.3.1 - Flange End Of 352-5651 Cylinder Assembly

5. Install a new 095-1730 O-Ring Seal and a new 126-1978 Backup Ring in the cylinder head. Use 1U-6396 O-Ring Compound.

Reassemble the stick cylinder group. Perform a bench test and make sure that the stick cylinder group does not leak. Reinstall the stick cylinder group on the machine.